---
_id: '427'
abstract:
- lang: eng
text: We investigate the quantum interference induced shifts between energetically
close states in highly charged ions, with the energy structure being observed
by laser spectroscopy. In this work, we focus on hyperfine states of lithiumlike
heavy-Z isotopes and quantify how much quantum interference changes the observed
transition frequencies. The process of photon excitation and subsequent photon
decay for the transition 2s→2p→2s is implemented with fully relativistic and full-multipole
frameworks, which are relevant for such relativistic atomic systems. We consider
the isotopes Pb79+207 and Bi80+209 due to experimental interest, as well as other
examples of isotopes with lower Z, namely Pr56+141 and Ho64+165. We conclude that
quantum interference can induce shifts up to 11% of the linewidth in the measurable
resonances of the considered isotopes, if interference between resonances is neglected.
The inclusion of relativity decreases the cross section by 35%, mainly due to
the complete retardation form of the electric dipole multipole. However, the contribution
of the next higher multipoles (e.g., magnetic quadrupole) to the cross section
is negligible. This makes the contribution of relativity and higher-order multipoles
to the quantum interference induced shifts a minor effect, even for heavy-Z elements.
acknowledgement: "This work was funded by the Portuguese Fundação para a Ciência e
a Tecnologia (FCT/MCTES/PIDDAC) under Grant No. UID/FIS/04559/2013 (LIBPhys). P.A.
acknowledges the support of the FCT, under Contract No. SFRH/BPD/92329/2013. L.S.
acknowledges financial support from the People Programme (Marie Curie Actions) of
the European Union's Seventh Framework Programme (FP7/2007-2013) under REA Grant
Agreement No. (291734). Laboratoire Kastler Brossel (LKB) is “Unité Mixte de Recherche
de Sorbonne Université, de ENS-PSL Research University, du Collège de France et
du CNRS No. 8552.” APPENDIX:\r\n"
article_number: '022510'
article_processing_charge: No
article_type: original
author:
- first_name: Pedro
full_name: Amaro, Pedro
last_name: Amaro
- first_name: Ulisses
full_name: Loureiro, Ulisses
last_name: Loureiro
- first_name: Laleh
full_name: Safari, Laleh
id: 3C325E5E-F248-11E8-B48F-1D18A9856A87
last_name: Safari
- first_name: Filippo
full_name: Fratini, Filippo
last_name: Fratini
- first_name: Paul
full_name: Indelicato, Paul
last_name: Indelicato
- first_name: Thomas
full_name: Stöhlker, Thomas
last_name: Stöhlker
- first_name: José
full_name: Santos, José
last_name: Santos
citation:
ama: Amaro P, Loureiro U, Safari L, et al. Quantum interference in laser spectroscopy
of highly charged lithiumlike ions. Physical Review A - Atomic, Molecular,
and Optical Physics. 2018;97(2). doi:10.1103/PhysRevA.97.022510
apa: Amaro, P., Loureiro, U., Safari, L., Fratini, F., Indelicato, P., Stöhlker,
T., & Santos, J. (2018). Quantum interference in laser spectroscopy of highly
charged lithiumlike ions. Physical Review A - Atomic, Molecular, and Optical
Physics. American Physical Society. https://doi.org/10.1103/PhysRevA.97.022510
chicago: Amaro, Pedro, Ulisses Loureiro, Laleh Safari, Filippo Fratini, Paul Indelicato,
Thomas Stöhlker, and José Santos. “Quantum Interference in Laser Spectroscopy
of Highly Charged Lithiumlike Ions.” Physical Review A - Atomic, Molecular,
and Optical Physics. American Physical Society, 2018. https://doi.org/10.1103/PhysRevA.97.022510.
ieee: P. Amaro et al., “Quantum interference in laser spectroscopy of highly
charged lithiumlike ions,” Physical Review A - Atomic, Molecular, and Optical
Physics, vol. 97, no. 2. American Physical Society, 2018.
ista: Amaro P, Loureiro U, Safari L, Fratini F, Indelicato P, Stöhlker T, Santos
J. 2018. Quantum interference in laser spectroscopy of highly charged lithiumlike
ions. Physical Review A - Atomic, Molecular, and Optical Physics. 97(2), 022510.
mla: Amaro, Pedro, et al. “Quantum Interference in Laser Spectroscopy of Highly
Charged Lithiumlike Ions.” Physical Review A - Atomic, Molecular, and Optical
Physics, vol. 97, no. 2, 022510, American Physical Society, 2018, doi:10.1103/PhysRevA.97.022510.
short: P. Amaro, U. Loureiro, L. Safari, F. Fratini, P. Indelicato, T. Stöhlker,
J. Santos, Physical Review A - Atomic, Molecular, and Optical Physics 97 (2018).
date_created: 2018-12-11T11:46:25Z
date_published: 2018-02-21T00:00:00Z
date_updated: 2023-09-15T12:09:35Z
day: '21'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.97.022510
ec_funded: 1
external_id:
arxiv:
- '1802.07920'
isi:
- '000425601000004'
intvolume: ' 97'
isi: 1
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1802.07920
month: '02'
oa: 1
oa_version: Preprint
project:
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
publication: ' Physical Review A - Atomic, Molecular, and Optical Physics'
publication_status: published
publisher: American Physical Society
publist_id: '7396'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Quantum interference in laser spectroscopy of highly charged lithiumlike ions
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 97
year: '2018'
...
---
_id: '309'
abstract:
- lang: eng
text: 'We present an efficient algorithm for a problem in the interface between
clustering and graph embeddings. An embedding '' : G ! M of a graph G into a 2manifold
M maps the vertices in V (G) to distinct points and the edges in E(G) to interior-disjoint
Jordan arcs between the corresponding vertices. In applications in clustering,
cartography, and visualization, nearby vertices and edges are often bundled to
a common node or arc, due to data compression or low resolution. This raises the
computational problem of deciding whether a given map '' : G ! M comes from an
embedding. A map '' : G ! M is a weak embedding if it can be perturbed into an
embedding ψ: G ! M with k'' "k < " for every " > 0. A polynomial-time
algorithm for recognizing weak embeddings was recently found by Fulek and Kyncl
[14], which reduces to solving a system of linear equations over Z2. It runs in
O(n2!) O(n4:75) time, where 2:373 is the matrix multiplication exponent and n
is the number of vertices and edges of G. We improve the running time to O(n log
n). Our algorithm is also conceptually simpler than [14]: We perform a sequence
of local operations that gradually "untangles" the image ''(G) into
an embedding (G), or reports that '' is not a weak embedding. It generalizes a
recent technique developed for the case that G is a cycle and the embedding is
a simple polygon [1], and combines local constraints on the orientation of subgraphs
directly, thereby eliminating the need for solving large systems of linear equations.'
acknowledgement: '∗Research supported in part by the NSF awards CCF-1422311 and CCF-1423615,
and the Science Without Borders program. The second author gratefully acknowledges
support from Austrian Science Fund (FWF): M2281-N35.'
article_processing_charge: No
author:
- first_name: Hugo
full_name: Akitaya, Hugo
last_name: Akitaya
- first_name: Radoslav
full_name: Fulek, Radoslav
id: 39F3FFE4-F248-11E8-B48F-1D18A9856A87
last_name: Fulek
orcid: 0000-0001-8485-1774
- first_name: Csaba
full_name: Tóth, Csaba
last_name: Tóth
citation:
ama: 'Akitaya H, Fulek R, Tóth C. Recognizing weak embeddings of graphs. In: ACM;
2018:274-292. doi:10.1137/1.9781611975031.20'
apa: 'Akitaya, H., Fulek, R., & Tóth, C. (2018). Recognizing weak embeddings
of graphs (pp. 274–292). Presented at the SODA: Symposium on Discrete Algorithms,
New Orleans, LA, USA: ACM. https://doi.org/10.1137/1.9781611975031.20'
chicago: Akitaya, Hugo, Radoslav Fulek, and Csaba Tóth. “Recognizing Weak Embeddings
of Graphs,” 274–92. ACM, 2018. https://doi.org/10.1137/1.9781611975031.20.
ieee: 'H. Akitaya, R. Fulek, and C. Tóth, “Recognizing weak embeddings of graphs,”
presented at the SODA: Symposium on Discrete Algorithms, New Orleans, LA, USA,
2018, pp. 274–292.'
ista: 'Akitaya H, Fulek R, Tóth C. 2018. Recognizing weak embeddings of graphs.
SODA: Symposium on Discrete Algorithms, 274–292.'
mla: Akitaya, Hugo, et al. Recognizing Weak Embeddings of Graphs. ACM, 2018,
pp. 274–92, doi:10.1137/1.9781611975031.20.
short: H. Akitaya, R. Fulek, C. Tóth, in:, ACM, 2018, pp. 274–292.
conference:
end_date: 2018-01-10
location: New Orleans, LA, USA
name: 'SODA: Symposium on Discrete Algorithms'
start_date: 2018-01-07
date_created: 2018-12-11T11:45:45Z
date_published: 2018-01-01T00:00:00Z
date_updated: 2023-09-15T12:19:32Z
day: '01'
department:
- _id: UlWa
doi: 10.1137/1.9781611975031.20
external_id:
arxiv:
- '1709.09209'
isi:
- '000483921200021'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1709.09209
month: '01'
oa: 1
oa_version: Preprint
page: 274 - 292
project:
- _id: 261FA626-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: M02281
name: Eliminating intersections in drawings of graphs
publication_status: published
publisher: ACM
publist_id: '7556'
quality_controlled: '1'
related_material:
record:
- id: '6982'
relation: later_version
status: public
scopus_import: '1'
status: public
title: Recognizing weak embeddings of graphs
type: conference
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2018'
...
---
_id: '5794'
abstract:
- lang: eng
text: We present an approach to interacting quantum many-body systems based on the
notion of quantum groups, also known as q-deformed Lie algebras. In particular,
we show that, if the symmetry of a free quantum particle corresponds to a Lie
group G, in the presence of a many-body environment this particle can be described
by a deformed group, Gq. Crucially, the single deformation parameter, q, contains
all the information about the many-particle interactions in the system. We exemplify
our approach by considering a quantum rotor interacting with a bath of bosons,
and demonstrate that extracting the value of q from closed-form solutions in the
perturbative regime allows one to predict the behavior of the system for arbitrary
values of the impurity-bath coupling strength, in good agreement with nonperturbative
calculations. Furthermore, the value of the deformation parameter allows one to
predict at which coupling strengths rotor-bath interactions result in a formation
of a stable quasiparticle. The approach based on quantum groups does not only
allow for a drastic simplification of impurity problems, but also provides valuable
insights into hidden symmetries of interacting many-particle systems.
article_number: '255302'
article_processing_charge: No
article_type: original
author:
- first_name: Enderalp
full_name: Yakaboylu, Enderalp
id: 38CB71F6-F248-11E8-B48F-1D18A9856A87
last_name: Yakaboylu
orcid: 0000-0001-5973-0874
- first_name: Mikhail
full_name: Shkolnikov, Mikhail
id: 35084A62-F248-11E8-B48F-1D18A9856A87
last_name: Shkolnikov
orcid: 0000-0002-4310-178X
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
citation:
ama: Yakaboylu E, Shkolnikov M, Lemeshko M. Quantum groups as hidden symmetries
of quantum impurities. Physical Review Letters. 2018;121(25). doi:10.1103/PhysRevLett.121.255302
apa: Yakaboylu, E., Shkolnikov, M., & Lemeshko, M. (2018). Quantum groups as
hidden symmetries of quantum impurities. Physical Review Letters. American
Physical Society. https://doi.org/10.1103/PhysRevLett.121.255302
chicago: Yakaboylu, Enderalp, Mikhail Shkolnikov, and Mikhail Lemeshko. “Quantum
Groups as Hidden Symmetries of Quantum Impurities.” Physical Review Letters.
American Physical Society, 2018. https://doi.org/10.1103/PhysRevLett.121.255302.
ieee: E. Yakaboylu, M. Shkolnikov, and M. Lemeshko, “Quantum groups as hidden symmetries
of quantum impurities,” Physical Review Letters, vol. 121, no. 25. American
Physical Society, 2018.
ista: Yakaboylu E, Shkolnikov M, Lemeshko M. 2018. Quantum groups as hidden symmetries
of quantum impurities. Physical Review Letters. 121(25), 255302.
mla: Yakaboylu, Enderalp, et al. “Quantum Groups as Hidden Symmetries of Quantum
Impurities.” Physical Review Letters, vol. 121, no. 25, 255302, American
Physical Society, 2018, doi:10.1103/PhysRevLett.121.255302.
short: E. Yakaboylu, M. Shkolnikov, M. Lemeshko, Physical Review Letters 121 (2018).
date_created: 2019-01-06T22:59:12Z
date_published: 2018-12-17T00:00:00Z
date_updated: 2023-09-15T12:09:06Z
day: '17'
department:
- _id: MiLe
doi: 10.1103/PhysRevLett.121.255302
ec_funded: 1
external_id:
arxiv:
- '1809.00222'
isi:
- '000454178600009'
intvolume: ' 121'
isi: 1
issue: '25'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1809.00222
month: '12'
oa: 1
oa_version: Preprint
project:
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
- _id: 26031614-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P29902
name: Quantum rotations in the presence of a many-body environment
publication: Physical Review Letters
publication_identifier:
issn:
- '00319007'
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Quantum groups as hidden symmetries of quantum impurities
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 121
year: '2018'
...
---
_id: '87'
abstract:
- lang: eng
text: Using the geodesic distance on the n-dimensional sphere, we study the expected
radius function of the Delaunay mosaic of a random set of points. Specifically,
we consider the partition of the mosaic into intervals of the radius function
and determine the expected number of intervals whose radii are less than or equal
to a given threshold. We find that the expectations are essentially the same as
for the Poisson–Delaunay mosaic in n-dimensional Euclidean space. Assuming the
points are not contained in a hemisphere, the Delaunay mosaic is isomorphic to
the boundary complex of the convex hull in Rn+1, so we also get the expected number
of faces of a random inscribed polytope. As proved in Antonelli et al. [Adv. in
Appl. Probab. 9–12 (1977–1980)], an orthant section of the n-sphere is isometric
to the standard n-simplex equipped with the Fisher information metric. It follows
that the latter space has similar stochastic properties as the n-dimensional Euclidean
space. Our results are therefore relevant in information geometry and in population
genetics.
article_processing_charge: No
article_type: original
author:
- first_name: Herbert
full_name: Edelsbrunner, Herbert
id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
last_name: Edelsbrunner
orcid: 0000-0002-9823-6833
- first_name: Anton
full_name: Nikitenko, Anton
id: 3E4FF1BA-F248-11E8-B48F-1D18A9856A87
last_name: Nikitenko
orcid: 0000-0002-0659-3201
citation:
ama: Edelsbrunner H, Nikitenko A. Random inscribed polytopes have similar radius
functions as Poisson-Delaunay mosaics. Annals of Applied Probability. 2018;28(5):3215-3238.
doi:10.1214/18-AAP1389
apa: Edelsbrunner, H., & Nikitenko, A. (2018). Random inscribed polytopes have
similar radius functions as Poisson-Delaunay mosaics. Annals of Applied Probability.
Institute of Mathematical Statistics. https://doi.org/10.1214/18-AAP1389
chicago: Edelsbrunner, Herbert, and Anton Nikitenko. “Random Inscribed Polytopes
Have Similar Radius Functions as Poisson-Delaunay Mosaics.” Annals of Applied
Probability. Institute of Mathematical Statistics, 2018. https://doi.org/10.1214/18-AAP1389.
ieee: H. Edelsbrunner and A. Nikitenko, “Random inscribed polytopes have similar
radius functions as Poisson-Delaunay mosaics,” Annals of Applied Probability,
vol. 28, no. 5. Institute of Mathematical Statistics, pp. 3215–3238, 2018.
ista: Edelsbrunner H, Nikitenko A. 2018. Random inscribed polytopes have similar
radius functions as Poisson-Delaunay mosaics. Annals of Applied Probability. 28(5),
3215–3238.
mla: Edelsbrunner, Herbert, and Anton Nikitenko. “Random Inscribed Polytopes Have
Similar Radius Functions as Poisson-Delaunay Mosaics.” Annals of Applied Probability,
vol. 28, no. 5, Institute of Mathematical Statistics, 2018, pp. 3215–38, doi:10.1214/18-AAP1389.
short: H. Edelsbrunner, A. Nikitenko, Annals of Applied Probability 28 (2018) 3215–3238.
date_created: 2018-12-11T11:44:33Z
date_published: 2018-10-01T00:00:00Z
date_updated: 2023-09-15T12:10:35Z
day: '01'
department:
- _id: HeEd
doi: 10.1214/18-AAP1389
external_id:
arxiv:
- '1705.02870'
isi:
- '000442893500018'
intvolume: ' 28'
isi: 1
issue: '5'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1705.02870
month: '10'
oa: 1
oa_version: Preprint
page: 3215 - 3238
project:
- _id: 2561EBF4-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: I02979-N35
name: Persistence and stability of geometric complexes
publication: Annals of Applied Probability
publication_status: published
publisher: Institute of Mathematical Statistics
publist_id: '7967'
quality_controlled: '1'
related_material:
record:
- id: '6287'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Random inscribed polytopes have similar radius functions as Poisson-Delaunay
mosaics
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 28
year: '2018'
...
---
_id: '192'
abstract:
- lang: eng
text: The phytohormone auxin is the information carrier in a plethora of developmental
and physiological processes in plants(1). It has been firmly established that
canonical, nuclear auxin signalling acts through regulation of gene transcription(2).
Here, we combined microfluidics, live imaging, genetic engineering and computational
modelling to reanalyse the classical case of root growth inhibition(3) by auxin.
We show that Arabidopsis roots react to addition and removal of auxin by extremely
rapid adaptation of growth rate. This process requires intracellular auxin perception
but not transcriptional reprogramming. The formation of the canonical TIR1/AFB-Aux/IAA
co-receptor complex is required for the growth regulation, hinting to a novel,
non-transcriptional branch of this signalling pathway. Our results challenge the
current understanding of root growth regulation by auxin and suggest another,
presumably non-transcriptional, signalling output of the canonical auxin pathway.
article_processing_charge: No
article_type: original
author:
- first_name: Matyas
full_name: Fendrych, Matyas
id: 43905548-F248-11E8-B48F-1D18A9856A87
last_name: Fendrych
orcid: 0000-0002-9767-8699
- first_name: Maria
full_name: Akhmanova, Maria
id: 3425EC26-F248-11E8-B48F-1D18A9856A87
last_name: Akhmanova
orcid: 0000-0003-1522-3162
- first_name: Jack
full_name: Merrin, Jack
id: 4515C308-F248-11E8-B48F-1D18A9856A87
last_name: Merrin
orcid: 0000-0001-5145-4609
- first_name: Matous
full_name: Glanc, Matous
last_name: Glanc
- first_name: Shinya
full_name: Hagihara, Shinya
last_name: Hagihara
- first_name: Koji
full_name: Takahashi, Koji
last_name: Takahashi
- first_name: Naoyuki
full_name: Uchida, Naoyuki
last_name: Uchida
- first_name: Keiko U
full_name: Torii, Keiko U
last_name: Torii
- first_name: Jirí
full_name: Friml, Jirí
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
citation:
ama: Fendrych M, Akhmanova M, Merrin J, et al. Rapid and reversible root growth
inhibition by TIR1 auxin signalling. Nature Plants. 2018;4(7):453-459.
doi:10.1038/s41477-018-0190-1
apa: Fendrych, M., Akhmanova, M., Merrin, J., Glanc, M., Hagihara, S., Takahashi,
K., … Friml, J. (2018). Rapid and reversible root growth inhibition by TIR1 auxin
signalling. Nature Plants. Springer Nature. https://doi.org/10.1038/s41477-018-0190-1
chicago: Fendrych, Matyas, Maria Akhmanova, Jack Merrin, Matous Glanc, Shinya Hagihara,
Koji Takahashi, Naoyuki Uchida, Keiko U Torii, and Jiří Friml. “Rapid and Reversible
Root Growth Inhibition by TIR1 Auxin Signalling.” Nature Plants. Springer
Nature, 2018. https://doi.org/10.1038/s41477-018-0190-1.
ieee: M. Fendrych et al., “Rapid and reversible root growth inhibition by
TIR1 auxin signalling,” Nature Plants, vol. 4, no. 7. Springer Nature,
pp. 453–459, 2018.
ista: Fendrych M, Akhmanova M, Merrin J, Glanc M, Hagihara S, Takahashi K, Uchida
N, Torii KU, Friml J. 2018. Rapid and reversible root growth inhibition by TIR1
auxin signalling. Nature Plants. 4(7), 453–459.
mla: Fendrych, Matyas, et al. “Rapid and Reversible Root Growth Inhibition by TIR1
Auxin Signalling.” Nature Plants, vol. 4, no. 7, Springer Nature, 2018,
pp. 453–59, doi:10.1038/s41477-018-0190-1.
short: M. Fendrych, M. Akhmanova, J. Merrin, M. Glanc, S. Hagihara, K. Takahashi,
N. Uchida, K.U. Torii, J. Friml, Nature Plants 4 (2018) 453–459.
date_created: 2018-12-11T11:45:07Z
date_published: 2018-06-25T00:00:00Z
date_updated: 2023-09-15T12:11:03Z
day: '25'
department:
- _id: JiFr
- _id: DaSi
- _id: NanoFab
doi: 10.1038/s41477-018-0190-1
external_id:
isi:
- '000443221200017'
pmid:
- '29942048'
intvolume: ' 4'
isi: 1
issue: '7'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.ncbi.nlm.nih.gov/pubmed/29942048
month: '06'
oa: 1
oa_version: Submitted Version
page: 453 - 459
pmid: 1
publication: Nature Plants
publication_status: published
publisher: Springer Nature
publist_id: '7728'
quality_controlled: '1'
related_material:
link:
- description: News on IST Homepage
relation: press_release
url: https://ist.ac.at/en/news/new-mechanism-for-the-plant-hormone-auxin-discovered/
scopus_import: '1'
status: public
title: Rapid and reversible root growth inhibition by TIR1 auxin signalling
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 4
year: '2018'
...