---
_id: '574'
abstract:
- lang: eng
text: 'Vaidman, in a recent article adopts the method of ''quantum weak measurements
in pre- and postselected ensembles'' to ascertain whether or not the chained-Zeno
counterfactual computation scheme proposed by Hosten et al. is counterfactual;
which has been the topic of a debate on the definition of counterfactuality. We
disagree with his conclusion, which brings up some interesting aspects of quantum
weak measurements and some concerns about the way they are interpreted. '
article_processing_charge: No
author:
- first_name: Onur
full_name: Hosten, Onur
id: 4C02D85E-F248-11E8-B48F-1D18A9856A87
last_name: Hosten
orcid: 0000-0002-2031-204X
- first_name: Paul
full_name: Kwiat, Paul
last_name: Kwiat
citation:
ama: Hosten O, Kwiat P. Weak measurements and counterfactual computation. 2006.
apa: Hosten, O., & Kwiat, P. (2006). Weak measurements and counterfactual computation.
ArXiv.
chicago: Hosten, Onur, and Paul Kwiat. “Weak Measurements and Counterfactual Computation.”
ArXiv, 2006.
ieee: O. Hosten and P. Kwiat, “Weak measurements and counterfactual computation.”
ArXiv, 2006.
ista: Hosten O, Kwiat P. 2006. Weak measurements and counterfactual computation.
mla: Hosten, Onur, and Paul Kwiat. Weak Measurements and Counterfactual Computation.
ArXiv, 2006.
short: O. Hosten, P. Kwiat, (2006).
date_created: 2018-12-11T11:47:16Z
date_published: 2006-12-19T00:00:00Z
date_updated: 2020-05-12T08:18:01Z
day: '19'
extern: '1'
external_id:
arxiv:
- '0612159'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/quant-ph/0612159
month: '12'
oa: 1
oa_version: Preprint
page: '2'
publication_status: published
publisher: ArXiv
publist_id: '7240'
status: public
title: Weak measurements and counterfactual computation
type: preprint
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2006'
...
---
_id: '578'
abstract:
- lang: eng
text: A source of single photons allows secure quantum key distribution, in addition,
to being a critical resource for linear optics quantum computing. We describe
our progress on deterministically creating single photons from spontaneous parametric
downconversion, an extension of the Pittman, Jacobs and Franson scheme [Phys.
Rev A, v66, 042303 (2002)]. Their idea was to conditionally prepare single photons
by measuring one member of a spontaneously emitted photon pair and storing the
remaining conditionally prepared photon until a predetermined time, when it would
be "deterministically" released from storage. Our approach attempts
to improve upon this by recycling the pump pulse in order to decrease the possibility
of multiple-pair generation, while maintaining a high probability of producing
a single pair. Many of the challenges we discuss are central to other quantum
information technologies, including the need for low-loss optical storage, switching
and detection, and fast feed-forward control.
alternative_title:
- Proc. SPIE
author:
- first_name: Nicholas
full_name: Peters, Nicholas A
last_name: Peters
- first_name: Keith
full_name: Arnold, Keith J
last_name: Arnold
- first_name: Aaron
full_name: VanDevender, Aaron P
last_name: Vandevender
- first_name: Evan
full_name: Jeffrey, Evan R
last_name: Jeffrey
- first_name: Radhika
full_name: Rangarajan, Radhika
last_name: Rangarajan
- first_name: Onur
full_name: Onur Hosten
id: 4C02D85E-F248-11E8-B48F-1D18A9856A87
last_name: Hosten
orcid: 0000-0002-2031-204X
- first_name: Julio
full_name: Barreiro, Julio T
last_name: Barreiro
- first_name: Joseph
full_name: Altepeter, Joseph B
last_name: Altepeter
- first_name: Paul
full_name: Kwiat, Paul G
last_name: Kwiat
citation:
ama: 'Peters N, Arnold K, Vandevender A, et al. Towards a quasi-deterministic single-photon
source. In: Vol 6305. SPIE; 2006. doi:10.1117/12.684702'
apa: Peters, N., Arnold, K., Vandevender, A., Jeffrey, E., Rangarajan, R., Hosten,
O., … Kwiat, P. (2006). Towards a quasi-deterministic single-photon source (Vol.
6305). Presented at the Quantum Communications and Quantum Imaging, SPIE. https://doi.org/10.1117/12.684702
chicago: Peters, Nicholas, Keith Arnold, Aaron Vandevender, Evan Jeffrey, Radhika
Rangarajan, Onur Hosten, Julio Barreiro, Joseph Altepeter, and Paul Kwiat. “Towards
a Quasi-Deterministic Single-Photon Source,” Vol. 6305. SPIE, 2006. https://doi.org/10.1117/12.684702.
ieee: N. Peters et al., “Towards a quasi-deterministic single-photon source,”
presented at the Quantum Communications and Quantum Imaging, 2006, vol. 6305.
ista: Peters N, Arnold K, Vandevender A, Jeffrey E, Rangarajan R, Hosten O, Barreiro
J, Altepeter J, Kwiat P. 2006. Towards a quasi-deterministic single-photon source.
Quantum Communications and Quantum Imaging, Proc. SPIE, vol. 6305.
mla: Peters, Nicholas, et al. Towards a Quasi-Deterministic Single-Photon Source.
Vol. 6305, SPIE, 2006, doi:10.1117/12.684702.
short: N. Peters, K. Arnold, A. Vandevender, E. Jeffrey, R. Rangarajan, O. Hosten,
J. Barreiro, J. Altepeter, P. Kwiat, in:, SPIE, 2006.
conference:
name: Quantum Communications and Quantum Imaging
date_created: 2018-12-11T11:47:17Z
date_published: 2006-01-01T00:00:00Z
date_updated: 2020-07-14T12:47:11Z
day: '01'
doi: 10.1117/12.684702
extern: 1
intvolume: ' 6305'
month: '01'
publication_status: published
publisher: SPIE
publist_id: '7234'
quality_controlled: 0
status: public
title: Towards a quasi-deterministic single-photon source
type: conference
volume: 6305
year: '2006'
...
---
_id: '577'
abstract:
- lang: eng
text: Visible light photon counters (VLPCs) and solid-state photomultipliers (SSPMs)
are high-efficiency single-photon detectors which have multi-photon counting capability.
While both the VLPCs and the SSPMs have inferred internal quantum efficiencies
above 93%, the actual measured values for both the detectors were in fact limited
to less than 88%, attributed to in-coupling losses. We are currently improving
this overall detection efficiency via a) custom anti-reflection coating the detectors
and the in-coupling fibers, b) implementing a novel cryogenic design to reduce
transmission losses and, c) using low-noise electronics to obtain a better signal-to-noise
ratio.
alternative_title:
- Proceedings of SPIE
author:
- first_name: Radhika
full_name: Rangarajan, Radhika
last_name: Rangarajan
- first_name: Joseph
full_name: Altepeter, Joseph B
last_name: Altepeter
- first_name: Evan
full_name: Jeffrey, Evan R
last_name: Jeffrey
- first_name: Micah
full_name: Stoutimore, Micah J
last_name: Stoutimore
- first_name: Nicholas
full_name: Peters, Nicholas A
last_name: Peters
- first_name: Onur
full_name: Onur Hosten
id: 4C02D85E-F248-11E8-B48F-1D18A9856A87
last_name: Hosten
orcid: 0000-0002-2031-204X
- first_name: Paul
full_name: Kwiat, Paul G
last_name: Kwiat
citation:
ama: 'Rangarajan R, Altepeter J, Jeffrey E, et al. High-efficiency single-photon
detectors. In: Vol 6372. SPIE; 2006. doi:10.1117/12.686117'
apa: Rangarajan, R., Altepeter, J., Jeffrey, E., Stoutimore, M., Peters, N., Hosten,
O., & Kwiat, P. (2006). High-efficiency single-photon detectors (Vol. 6372).
Presented at the Unknown (978-081946470-5), SPIE. https://doi.org/10.1117/12.686117
chicago: Rangarajan, Radhika, Joseph Altepeter, Evan Jeffrey, Micah Stoutimore,
Nicholas Peters, Onur Hosten, and Paul Kwiat. “High-Efficiency Single-Photon Detectors,”
Vol. 6372. SPIE, 2006. https://doi.org/10.1117/12.686117.
ieee: R. Rangarajan et al., “High-efficiency single-photon detectors,” presented
at the Unknown (978-081946470-5), 2006, vol. 6372.
ista: Rangarajan R, Altepeter J, Jeffrey E, Stoutimore M, Peters N, Hosten O, Kwiat
P. 2006. High-efficiency single-photon detectors. Unknown (978-081946470-5), Proceedings
of SPIE, vol. 6372.
mla: Rangarajan, Radhika, et al. High-Efficiency Single-Photon Detectors.
Vol. 6372, SPIE, 2006, doi:10.1117/12.686117.
short: R. Rangarajan, J. Altepeter, E. Jeffrey, M. Stoutimore, N. Peters, O. Hosten,
P. Kwiat, in:, SPIE, 2006.
conference:
name: Unknown (978-081946470-5)
date_created: 2018-12-11T11:47:17Z
date_published: 2006-01-01T00:00:00Z
date_updated: 2020-07-14T12:47:11Z
day: '01'
doi: 10.1117/12.686117
extern: 1
intvolume: ' 6372'
month: '01'
publication_status: published
publisher: SPIE
publist_id: '7233'
quality_controlled: 0
status: public
title: High-efficiency single-photon detectors
type: conference
volume: 6372
year: '2006'
...
---
_id: '579'
abstract:
- lang: eng
text: 'The logic underlying the coherent nature of quantum information processing
often deviates from intuitive reasoning, leading to surprising effects. Counterfactual
computation constitutes a striking example: the potential outcome of a quantum
computation can be inferred, even if the computer is not run 1. Relying on similar
arguments to interaction-free measurements 2 (or quantum interrogation3), counterfactual
computation is accomplished by putting the computer in a superposition of ''running''
and ''not running'' states, and then interfering the two histories. Conditional
on the as-yet-unknown outcome of the computation, it is sometimes possible to
counterfactually infer information about the solution. Here we demonstrate counterfactual
computation, implementing Grover''s search algorithm with an all-optical approach4.
It was believed that the overall probability of such counterfactual inference
is intrinsically limited1,5, so that it could not perform better on average than
random guesses. However, using a novel ''chained'' version of the quantum Zeno
effect6, we show how to boost the counterfactual inference probability to unity,
thereby beating the random guessing limit. Our methods are general and apply to
any physical system, as illustrated by a discussion of trapped-ion systems. Finally,
we briefly show that, in certain circumstances, counterfactual computation can
eliminate errors induced by decoherence. '
author:
- first_name: Onur
full_name: Onur Hosten
id: 4C02D85E-F248-11E8-B48F-1D18A9856A87
last_name: Hosten
orcid: 0000-0002-2031-204X
- first_name: Matthew
full_name: Rakher, Matthew T
last_name: Rakher
- first_name: Julio
full_name: Barreiro, Julio T
last_name: Barreiro
- first_name: Nicholas
full_name: Peters, Nicholas A
last_name: Peters
- first_name: Paul
full_name: Kwiat, Paul G
last_name: Kwiat
citation:
ama: Hosten O, Rakher M, Barreiro J, Peters N, Kwiat P. Counterfactual quantum computation
through quantum interrogation. Nature. 2006;439(7079):949-952. doi:10.1038/nature04523
apa: Hosten, O., Rakher, M., Barreiro, J., Peters, N., & Kwiat, P. (2006). Counterfactual
quantum computation through quantum interrogation. Nature. Nature Publishing
Group. https://doi.org/10.1038/nature04523
chicago: Hosten, Onur, Matthew Rakher, Julio Barreiro, Nicholas Peters, and Paul
Kwiat. “Counterfactual Quantum Computation through Quantum Interrogation.” Nature.
Nature Publishing Group, 2006. https://doi.org/10.1038/nature04523.
ieee: O. Hosten, M. Rakher, J. Barreiro, N. Peters, and P. Kwiat, “Counterfactual
quantum computation through quantum interrogation,” Nature, vol. 439, no.
7079. Nature Publishing Group, pp. 949–952, 2006.
ista: Hosten O, Rakher M, Barreiro J, Peters N, Kwiat P. 2006. Counterfactual quantum
computation through quantum interrogation. Nature. 439(7079), 949–952.
mla: Hosten, Onur, et al. “Counterfactual Quantum Computation through Quantum Interrogation.”
Nature, vol. 439, no. 7079, Nature Publishing Group, 2006, pp. 949–52,
doi:10.1038/nature04523.
short: O. Hosten, M. Rakher, J. Barreiro, N. Peters, P. Kwiat, Nature 439 (2006)
949–952.
date_created: 2018-12-11T11:47:18Z
date_published: 2006-02-23T00:00:00Z
date_updated: 2021-01-12T08:03:29Z
day: '23'
doi: 10.1038/nature04523
extern: 1
intvolume: ' 439'
issue: '7079'
month: '02'
page: 949 - 952
publication: Nature
publication_status: published
publisher: Nature Publishing Group
publist_id: '7235'
quality_controlled: 0
status: public
title: Counterfactual quantum computation through quantum interrogation
type: journal_article
volume: 439
year: '2006'
...
---
_id: '583'
abstract:
- lang: eng
text: Visible light photon counters (VLPCs) and solid-state photomultipliers (SSPMs)
facilitate efficient single-photon detection. We are attempting to improve their
efficiency, previously limited to < 88% by coupling losses, via anti-reflection
coatings, better electronics and cryogenics.
author:
- first_name: Radhika
full_name: Rangarajan, Radhika
last_name: Rangarajan
- first_name: Nicholas
full_name: Peters, Nicholas A
last_name: Peters
- first_name: Onur
full_name: Onur Hosten
id: 4C02D85E-F248-11E8-B48F-1D18A9856A87
last_name: Hosten
orcid: 0000-0002-2031-204X
- first_name: Joseph
full_name: Altepeter, Joseph B
last_name: Altepeter
- first_name: Evan
full_name: Jeffrey, Evan R
last_name: Jeffrey
- first_name: Paul
full_name: Kwiat, Paul G
last_name: Kwiat
citation:
ama: 'Rangarajan R, Peters N, Hosten O, Altepeter J, Jeffrey E, Kwiat P. Improved
single-photon detection. In: IEEE; 2006. doi:10.1109/CLEO.2006.4628641'
apa: 'Rangarajan, R., Peters, N., Hosten, O., Altepeter, J., Jeffrey, E., &
Kwiat, P. (2006). Improved single-photon detection. Presented at the CLEO/QELS:
Conference on Lasers and Electro-Optics / Quantum Electronics and Laser Science
Conference, IEEE. https://doi.org/10.1109/CLEO.2006.4628641'
chicago: Rangarajan, Radhika, Nicholas Peters, Onur Hosten, Joseph Altepeter, Evan
Jeffrey, and Paul Kwiat. “Improved Single-Photon Detection.” IEEE, 2006. https://doi.org/10.1109/CLEO.2006.4628641.
ieee: 'R. Rangarajan, N. Peters, O. Hosten, J. Altepeter, E. Jeffrey, and P. Kwiat,
“Improved single-photon detection,” presented at the CLEO/QELS: Conference on
Lasers and Electro-Optics / Quantum Electronics and Laser Science Conference,
2006.'
ista: 'Rangarajan R, Peters N, Hosten O, Altepeter J, Jeffrey E, Kwiat P. 2006.
Improved single-photon detection. CLEO/QELS: Conference on Lasers and Electro-Optics
/ Quantum Electronics and Laser Science Conference.'
mla: Rangarajan, Radhika, et al. Improved Single-Photon Detection. IEEE,
2006, doi:10.1109/CLEO.2006.4628641.
short: R. Rangarajan, N. Peters, O. Hosten, J. Altepeter, E. Jeffrey, P. Kwiat,
in:, IEEE, 2006.
conference:
name: 'CLEO/QELS: Conference on Lasers and Electro-Optics / Quantum Electronics
and Laser Science Conference'
date_created: 2018-12-11T11:47:19Z
date_published: 2006-01-01T00:00:00Z
date_updated: 2021-01-12T08:03:43Z
day: '01'
doi: 10.1109/CLEO.2006.4628641
extern: 1
month: '01'
publication_status: published
publisher: IEEE
publist_id: '7232'
quality_controlled: 0
status: public
title: Improved single-photon detection
type: conference
year: '2006'
...
---
_id: '6151'
author:
- first_name: Iris
full_name: Salecker, Iris
last_name: Salecker
- first_name: Michael
full_name: Häusser, Michael
last_name: Häusser
- first_name: Mario
full_name: de Bono, Mario
id: 4E3FF80E-F248-11E8-B48F-1D18A9856A87
last_name: de Bono
orcid: 0000-0001-8347-0443
citation:
ama: 'Salecker I, Häusser M, de Bono M. On the axonal road to circuit function and
behaviour: Workshop on the assembly and function of neuronal circuits. EMBO
reports. 2006;7(6):585-589. doi:10.1038/sj.embor.7400713'
apa: 'Salecker, I., Häusser, M., & de Bono, M. (2006). On the axonal road to
circuit function and behaviour: Workshop on the assembly and function of neuronal
circuits. EMBO Reports. Wiley. https://doi.org/10.1038/sj.embor.7400713'
chicago: 'Salecker, Iris, Michael Häusser, and Mario de Bono. “On the Axonal Road
to Circuit Function and Behaviour: Workshop on the Assembly and Function of Neuronal
Circuits.” EMBO Reports. Wiley, 2006. https://doi.org/10.1038/sj.embor.7400713.'
ieee: 'I. Salecker, M. Häusser, and M. de Bono, “On the axonal road to circuit function
and behaviour: Workshop on the assembly and function of neuronal circuits,” EMBO
reports, vol. 7, no. 6. Wiley, pp. 585–589, 2006.'
ista: 'Salecker I, Häusser M, de Bono M. 2006. On the axonal road to circuit function
and behaviour: Workshop on the assembly and function of neuronal circuits. EMBO
reports. 7(6), 585–589.'
mla: 'Salecker, Iris, et al. “On the Axonal Road to Circuit Function and Behaviour:
Workshop on the Assembly and Function of Neuronal Circuits.” EMBO Reports,
vol. 7, no. 6, Wiley, 2006, pp. 585–89, doi:10.1038/sj.embor.7400713.'
short: I. Salecker, M. Häusser, M. de Bono, EMBO Reports 7 (2006) 585–589.
date_created: 2019-03-21T08:50:43Z
date_published: 2006-06-01T00:00:00Z
date_updated: 2021-01-12T08:06:23Z
day: '01'
doi: 10.1038/sj.embor.7400713
extern: '1'
external_id:
pmid:
- '16729018'
intvolume: ' 7'
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://europepmc.org/articles/pmc1479602
month: '06'
oa: 1
oa_version: Published Version
page: 585-589
pmid: 1
publication: EMBO reports
publication_identifier:
issn:
- 1469-221X
- 1469-3178
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: 'On the axonal road to circuit function and behaviour: Workshop on the assembly
and function of neuronal circuits'
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 7
year: '2006'
...
---
_id: '6152'
author:
- first_name: Candida
full_name: Rogers, Candida
last_name: Rogers
- first_name: Annelie
full_name: Persson, Annelie
last_name: Persson
- first_name: Benny
full_name: Cheung, Benny
last_name: Cheung
- first_name: Mario
full_name: de Bono, Mario
id: 4E3FF80E-F248-11E8-B48F-1D18A9856A87
last_name: de Bono
orcid: 0000-0001-8347-0443
citation:
ama: Rogers C, Persson A, Cheung B, de Bono M. Behavioral motifs and neural pathways
coordinating O2 responses and aggregation in C. elegans. Current Biology.
2006;16(7):649-659. doi:10.1016/j.cub.2006.03.023
apa: Rogers, C., Persson, A., Cheung, B., & de Bono, M. (2006). Behavioral motifs
and neural pathways coordinating O2 responses and aggregation in C. elegans. Current
Biology. Elsevier. https://doi.org/10.1016/j.cub.2006.03.023
chicago: Rogers, Candida, Annelie Persson, Benny Cheung, and Mario de Bono. “Behavioral
Motifs and Neural Pathways Coordinating O2 Responses and Aggregation in C. Elegans.”
Current Biology. Elsevier, 2006. https://doi.org/10.1016/j.cub.2006.03.023.
ieee: C. Rogers, A. Persson, B. Cheung, and M. de Bono, “Behavioral motifs and neural
pathways coordinating O2 responses and aggregation in C. elegans,” Current
Biology, vol. 16, no. 7. Elsevier, pp. 649–659, 2006.
ista: Rogers C, Persson A, Cheung B, de Bono M. 2006. Behavioral motifs and neural
pathways coordinating O2 responses and aggregation in C. elegans. Current Biology.
16(7), 649–659.
mla: Rogers, Candida, et al. “Behavioral Motifs and Neural Pathways Coordinating
O2 Responses and Aggregation in C. Elegans.” Current Biology, vol. 16,
no. 7, Elsevier, 2006, pp. 649–59, doi:10.1016/j.cub.2006.03.023.
short: C. Rogers, A. Persson, B. Cheung, M. de Bono, Current Biology 16 (2006) 649–659.
date_created: 2019-03-21T09:15:27Z
date_published: 2006-04-04T00:00:00Z
date_updated: 2021-01-12T08:06:23Z
day: '04'
doi: 10.1016/j.cub.2006.03.023
extern: '1'
external_id:
pmid:
- '16581509'
intvolume: ' 16'
issue: '7'
language:
- iso: eng
month: '04'
oa_version: None
page: 649-659
pmid: 1
publication: Current Biology
publication_identifier:
issn:
- 0960-9822
publication_status: published
publisher: Elsevier
quality_controlled: '1'
status: public
title: Behavioral motifs and neural pathways coordinating O2 responses and aggregation
in C. elegans
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 16
year: '2006'
...
---
_id: '7328'
abstract:
- lang: eng
text: An experimental technique for measuring the current density distribution with
a resolution smaller than the channel/rib scale of the flow field in polymer electrolyte
fuel cells (PEFCs) is presented. The electron conductors in a plane perpendicular
to the channel direction are considered as two-dimensional resistors. Hence, the
current density is obtained from the solution of Laplace's equation with the potentials
at current collector and reaction layer as boundary conditions. Using ohmic drop
for calculating the local current, detailed knowledge of all resistances involved
is of prime importance. In particular, the contact resistance between the gas
diffusion layer (GDL) and flow field rib, as well as GDL bulk conductivity, are
strongly dependent on clamping pressure. They represent a substantial amount of
the total ohmic drop and therefore require careful consideration. The detailed
experimental setup as well as the concise procedure for quantitative data evaluation
is described. Finally, the method is applied successfully to a cell operated on
pure oxygen and air up to high current densities. The results show that electrical
and ionic resistances seem to govern the current distribution at low current regimes,
whereas mass transport limitations locally hamper the current production at high
loads.
article_number: A2158
article_processing_charge: No
article_type: original
author:
- first_name: Stefan Alexander
full_name: Freunberger, Stefan Alexander
id: A8CA28E6-CE23-11E9-AD2D-EC27E6697425
last_name: Freunberger
orcid: 0000-0003-2902-5319
- first_name: Mathias
full_name: Reum, Mathias
last_name: Reum
- first_name: Jörg
full_name: Evertz, Jörg
last_name: Evertz
- first_name: Alexander
full_name: Wokaun, Alexander
last_name: Wokaun
- first_name: Felix N.
full_name: Büchi, Felix N.
last_name: Büchi
citation:
ama: Freunberger SA, Reum M, Evertz J, Wokaun A, Büchi FN. Measuring the current
distribution in PEFCs with sub-millimeter resolution. Journal of The Electrochemical
Society. 2006;153(11). doi:10.1149/1.2345591
apa: Freunberger, S. A., Reum, M., Evertz, J., Wokaun, A., & Büchi, F. N. (2006).
Measuring the current distribution in PEFCs with sub-millimeter resolution. Journal
of The Electrochemical Society. The Electrochemical Society. https://doi.org/10.1149/1.2345591
chicago: Freunberger, Stefan Alexander, Mathias Reum, Jörg Evertz, Alexander Wokaun,
and Felix N. Büchi. “Measuring the Current Distribution in PEFCs with Sub-Millimeter
Resolution.” Journal of The Electrochemical Society. The Electrochemical
Society, 2006. https://doi.org/10.1149/1.2345591.
ieee: S. A. Freunberger, M. Reum, J. Evertz, A. Wokaun, and F. N. Büchi, “Measuring
the current distribution in PEFCs with sub-millimeter resolution,” Journal
of The Electrochemical Society, vol. 153, no. 11. The Electrochemical Society,
2006.
ista: Freunberger SA, Reum M, Evertz J, Wokaun A, Büchi FN. 2006. Measuring the
current distribution in PEFCs with sub-millimeter resolution. Journal of The Electrochemical
Society. 153(11), A2158.
mla: Freunberger, Stefan Alexander, et al. “Measuring the Current Distribution in
PEFCs with Sub-Millimeter Resolution.” Journal of The Electrochemical Society,
vol. 153, no. 11, A2158, The Electrochemical Society, 2006, doi:10.1149/1.2345591.
short: S.A. Freunberger, M. Reum, J. Evertz, A. Wokaun, F.N. Büchi, Journal of
The Electrochemical Society 153 (2006).
date_created: 2020-01-15T12:23:12Z
date_published: 2006-09-20T00:00:00Z
date_updated: 2021-01-12T08:13:06Z
day: '20'
doi: 10.1149/1.2345591
extern: '1'
intvolume: ' 153'
issue: '11'
language:
- iso: eng
month: '09'
oa_version: None
publication: Journal of The Electrochemical Society
publication_identifier:
issn:
- 0013-4651
publication_status: published
publisher: The Electrochemical Society
quality_controlled: '1'
status: public
title: Measuring the current distribution in PEFCs with sub-millimeter resolution
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 153
year: '2006'
...
---
_id: '7327'
abstract:
- lang: eng
text: "Propagation of performance changes to adjacent cells in polymer electrolyte
fuel cell stacks is studied by means of voltage monitoring and local current density
measurements in peripheral cells of the stack. A technical fuel cell stack has
been modified by implementing two independent reactant and coolant supplies in
order to deliberately change the performance of one cell (anomalous cell) and
study the coupling phenomena to adjacent cells (coupling cells), while keeping
the working conditions of the later cell-group unaltered.\r\nTwo anomalies are
studied: (i) air starvation and (ii) thermal anomaly, in a single anomalous cell
in the stack and their coupling to adjacent cells. The results have shown that
anomalies inducing considerable changes in the local current density of the anomalous
cell (such as air starvation) propagate to adjacent cells affecting their performance.
The propagation of local current density changes takes place via the common bipolar
plate due to its finite thickness and in-plane conductivity. Consequently, anomalies
which do not strongly influence the local current density distribution (such as
a thermal anomaly under the studied working conditions) do not propagate to adjacent
cells."
article_processing_charge: No
article_type: original
author:
- first_name: Marco
full_name: Santis, Marco
last_name: Santis
- first_name: Stefan Alexander
full_name: Freunberger, Stefan Alexander
id: A8CA28E6-CE23-11E9-AD2D-EC27E6697425
last_name: Freunberger
orcid: 0000-0003-2902-5319
- first_name: Matthias
full_name: Papra, Matthias
last_name: Papra
- first_name: Alexander
full_name: Wokaun, Alexander
last_name: Wokaun
- first_name: Felix N.
full_name: Büchi, Felix N.
last_name: Büchi
citation:
ama: Santis M, Freunberger SA, Papra M, Wokaun A, Büchi FN. Experimental investigation
of coupling phenomena in polymer electrolyte fuel cell stacks. Journal of Power
Sources. 2006;161(2):1076-1083. doi:10.1016/j.jpowsour.2006.06.007
apa: Santis, M., Freunberger, S. A., Papra, M., Wokaun, A., & Büchi, F. N. (2006).
Experimental investigation of coupling phenomena in polymer electrolyte fuel cell
stacks. Journal of Power Sources. Elsevier. https://doi.org/10.1016/j.jpowsour.2006.06.007
chicago: Santis, Marco, Stefan Alexander Freunberger, Matthias Papra, Alexander
Wokaun, and Felix N. Büchi. “Experimental Investigation of Coupling Phenomena
in Polymer Electrolyte Fuel Cell Stacks.” Journal of Power Sources. Elsevier,
2006. https://doi.org/10.1016/j.jpowsour.2006.06.007.
ieee: M. Santis, S. A. Freunberger, M. Papra, A. Wokaun, and F. N. Büchi, “Experimental
investigation of coupling phenomena in polymer electrolyte fuel cell stacks,”
Journal of Power Sources, vol. 161, no. 2. Elsevier, pp. 1076–1083, 2006.
ista: Santis M, Freunberger SA, Papra M, Wokaun A, Büchi FN. 2006. Experimental
investigation of coupling phenomena in polymer electrolyte fuel cell stacks. Journal
of Power Sources. 161(2), 1076–1083.
mla: Santis, Marco, et al. “Experimental Investigation of Coupling Phenomena in
Polymer Electrolyte Fuel Cell Stacks.” Journal of Power Sources, vol. 161,
no. 2, Elsevier, 2006, pp. 1076–83, doi:10.1016/j.jpowsour.2006.06.007.
short: M. Santis, S.A. Freunberger, M. Papra, A. Wokaun, F.N. Büchi, Journal of
Power Sources 161 (2006) 1076–1083.
date_created: 2020-01-15T12:22:56Z
date_published: 2006-10-27T00:00:00Z
date_updated: 2021-01-12T08:13:06Z
day: '27'
doi: 10.1016/j.jpowsour.2006.06.007
extern: '1'
intvolume: ' 161'
issue: '2'
language:
- iso: eng
month: '10'
oa_version: None
page: 1076-1083
publication: Journal of Power Sources
publication_identifier:
issn:
- 0378-7753
publication_status: published
publisher: Elsevier
status: public
title: Experimental investigation of coupling phenomena in polymer electrolyte fuel
cell stacks
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 161
year: '2006'
...
---
_id: '7326'
abstract:
- lang: eng
text: 'Often the properties of a single cell are considered as representative for
a complete polymer electrolyte fuel cell stack or even a fuel cell system. In
some cases this comes close, however, in many real cases differences on several
scales become important. Cell interaction phenomena in fuel cell stacks that arise
from inequalities between adjacent cells are investigated in detail experimentally.
For that, a specialized 2-cell stack with advanced localized diagnostics was developed.
The results show that inequalities propagate by electrical coupling, inhomogeneous
cell polarization and inducing in-plane current in the common bipolar plate. The
effects of the different loss-mechanisms are analyzed and quantified. '
article_processing_charge: No
author:
- first_name: Felix N.
full_name: Büchi, Felix N.
last_name: Büchi
- first_name: Stefan Alexander
full_name: Freunberger, Stefan Alexander
id: A8CA28E6-CE23-11E9-AD2D-EC27E6697425
last_name: Freunberger
orcid: 0000-0003-2902-5319
- first_name: Marco
full_name: Santis, Marco
last_name: Santis
citation:
ama: 'Büchi FN, Freunberger SA, Santis M. What is learned beyond the scale of single
cells? In: ECS Transactions. Vol 3. ECS; 2006:963-968. doi:10.1149/1.2356215'
apa: 'Büchi, F. N., Freunberger, S. A., & Santis, M. (2006). What is learned
beyond the scale of single cells? In ECS Transactions (Vol. 3, pp. 963–968).
Cancun, Mexico: ECS. https://doi.org/10.1149/1.2356215'
chicago: Büchi, Felix N., Stefan Alexander Freunberger, and Marco Santis. “What
Is Learned beyond the Scale of Single Cells?” In ECS Transactions, 3:963–68.
ECS, 2006. https://doi.org/10.1149/1.2356215.
ieee: F. N. Büchi, S. A. Freunberger, and M. Santis, “What is learned beyond the
scale of single cells?,” in ECS Transactions, Cancun, Mexico, 2006, vol.
3, no. 1, pp. 963–968.
ista: Büchi FN, Freunberger SA, Santis M. 2006. What is learned beyond the scale
of single cells? ECS Transactions. ECS Meeting vol. 3, 963–968.
mla: Büchi, Felix N., et al. “What Is Learned beyond the Scale of Single Cells?”
ECS Transactions, vol. 3, no. 1, ECS, 2006, pp. 963–68, doi:10.1149/1.2356215.
short: F.N. Büchi, S.A. Freunberger, M. Santis, in:, ECS Transactions, ECS, 2006,
pp. 963–968.
conference:
end_date: 2006-11-03
location: Cancun, Mexico
name: ECS Meeting
start_date: 2006-10-29
date_created: 2020-01-15T12:22:44Z
date_published: 2006-11-03T00:00:00Z
date_updated: 2021-01-12T08:13:05Z
day: '03'
doi: 10.1149/1.2356215
extern: '1'
intvolume: ' 3'
issue: '1'
language:
- iso: eng
month: '11'
oa_version: None
page: 963-968
publication: ECS Transactions
publication_status: published
publisher: ECS
quality_controlled: '1'
status: public
title: What is learned beyond the scale of single cells?
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 3
year: '2006'
...