---
_id: '8383'
abstract:
- lang: eng
text: We introduce extension-based proofs, a class of impossibility proofs that
includes valency arguments. They are modelled as an interaction between a prover
and a protocol. Using proofs based on combinatorial topology, it has been shown
that it is impossible to deterministically solve k-set agreement among n > k ≥
2 processes in a wait-free manner. However, it was unknown whether proofs based
on simpler techniques were possible. We explain why this impossibility result
cannot be obtained by an extension-based proof and, hence, extension-based proofs
are limited in power.
article_processing_charge: No
author:
- first_name: Dan-Adrian
full_name: Alistarh, Dan-Adrian
id: 4A899BFC-F248-11E8-B48F-1D18A9856A87
last_name: Alistarh
orcid: 0000-0003-3650-940X
- first_name: James
full_name: Aspnes, James
last_name: Aspnes
- first_name: Faith
full_name: Ellen, Faith
last_name: Ellen
- first_name: Rati
full_name: Gelashvili, Rati
last_name: Gelashvili
- first_name: Leqi
full_name: Zhu, Leqi
last_name: Zhu
citation:
ama: 'Alistarh D-A, Aspnes J, Ellen F, Gelashvili R, Zhu L. Brief Announcement:
Why Extension-Based Proofs Fail. In: Proceedings of the 39th Symposium on Principles
of Distributed Computing. Association for Computing Machinery; 2020:54-56.
doi:10.1145/3382734.3405743'
apa: 'Alistarh, D.-A., Aspnes, J., Ellen, F., Gelashvili, R., & Zhu, L. (2020).
Brief Announcement: Why Extension-Based Proofs Fail. In Proceedings of the
39th Symposium on Principles of Distributed Computing (pp. 54–56). Virtual,
Italy: Association for Computing Machinery. https://doi.org/10.1145/3382734.3405743'
chicago: 'Alistarh, Dan-Adrian, James Aspnes, Faith Ellen, Rati Gelashvili, and
Leqi Zhu. “Brief Announcement: Why Extension-Based Proofs Fail.” In Proceedings
of the 39th Symposium on Principles of Distributed Computing, 54–56. Association
for Computing Machinery, 2020. https://doi.org/10.1145/3382734.3405743.'
ieee: 'D.-A. Alistarh, J. Aspnes, F. Ellen, R. Gelashvili, and L. Zhu, “Brief Announcement:
Why Extension-Based Proofs Fail,” in Proceedings of the 39th Symposium on Principles
of Distributed Computing, Virtual, Italy, 2020, pp. 54–56.'
ista: 'Alistarh D-A, Aspnes J, Ellen F, Gelashvili R, Zhu L. 2020. Brief Announcement:
Why Extension-Based Proofs Fail. Proceedings of the 39th Symposium on Principles
of Distributed Computing. PODC: Principles of Distributed Computing, 54–56.'
mla: 'Alistarh, Dan-Adrian, et al. “Brief Announcement: Why Extension-Based Proofs
Fail.” Proceedings of the 39th Symposium on Principles of Distributed Computing,
Association for Computing Machinery, 2020, pp. 54–56, doi:10.1145/3382734.3405743.'
short: D.-A. Alistarh, J. Aspnes, F. Ellen, R. Gelashvili, L. Zhu, in:, Proceedings
of the 39th Symposium on Principles of Distributed Computing, Association for
Computing Machinery, 2020, pp. 54–56.
conference:
end_date: 2020-08-07
location: Virtual, Italy
name: 'PODC: Principles of Distributed Computing'
start_date: 2020-08-03
date_created: 2020-09-13T22:01:18Z
date_published: 2020-07-31T00:00:00Z
date_updated: 2024-02-28T12:54:19Z
day: '31'
department:
- _id: DaAl
doi: 10.1145/3382734.3405743
language:
- iso: eng
month: '07'
oa_version: None
page: 54-56
publication: Proceedings of the 39th Symposium on Principles of Distributed Computing
publication_identifier:
isbn:
- '9781450375825'
publication_status: published
publisher: Association for Computing Machinery
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Brief Announcement: Why Extension-Based Proofs Fail'
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2020'
...
---
_id: '8385'
abstract:
- lang: eng
text: 'We present a method for animating yarn-level cloth effects using a thin-shell
solver. We accomplish this through numerical homogenization: we first use a large
number of yarn-level simulations to build a model of the potential energy density
of the cloth, and then use this energy density function to compute forces in a
thin shell simulator. We model several yarn-based materials, including both woven
and knitted fabrics. Our model faithfully reproduces expected effects like the
stiffness of woven fabrics, and the highly deformable nature and anisotropy of
knitted fabrics. Our approach does not require any real-world experiments nor
measurements; because the method is based entirely on simulations, it can generate
entirely new material models quickly, without the need for testing apparatuses
or human intervention. We provide data-driven models of several woven and knitted
fabrics, which can be used for efficient simulation with an off-the-shelf cloth
solver.'
acknowledged_ssus:
- _id: ScienComp
acknowledgement: "We wish to thank the anonymous reviewers and the members of the
Visual Computing Group at IST Austria for their valuable feedback. We also thank
the creators of the Berkeley Garment Library [de Joya et al. 2012] for providing
garment meshes, [Krishnamurthy and Levoy 1996] and [Turk and Levoy 1994] for the
armadillo and bunny meshes, the creators of libWetCloth [Fei et al. 2018] for their
implementation of discrete elastic rod forces, and Tomáš Skřivan for\r\ninspiring
discussions and help with Mathematica code generation. This research was supported
by the Scientific Service Units (SSU) of IST Austria through resources provided
by Scientific Computing. This project has received funding from the European Research
Council (ERC) under the European Union’s Horizon 2020 research and innovation programme
under grant agreement No. 638176. Rahul Narain is supported by a Pankaj Gupta Young
Faculty Fellowship and a gift from Adobe Inc."
article_number: '48'
article_processing_charge: No
article_type: original
author:
- first_name: Georg
full_name: Sperl, Georg
id: 4DD40360-F248-11E8-B48F-1D18A9856A87
last_name: Sperl
- first_name: Rahul
full_name: Narain, Rahul
last_name: Narain
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
citation:
ama: Sperl G, Narain R, Wojtan C. Homogenized yarn-level cloth. ACM Transactions
on Graphics. 2020;39(4). doi:10.1145/3386569.3392412
apa: Sperl, G., Narain, R., & Wojtan, C. (2020). Homogenized yarn-level cloth.
ACM Transactions on Graphics. Association for Computing Machinery. https://doi.org/10.1145/3386569.3392412
chicago: Sperl, Georg, Rahul Narain, and Chris Wojtan. “Homogenized Yarn-Level Cloth.”
ACM Transactions on Graphics. Association for Computing Machinery, 2020.
https://doi.org/10.1145/3386569.3392412.
ieee: G. Sperl, R. Narain, and C. Wojtan, “Homogenized yarn-level cloth,” ACM
Transactions on Graphics, vol. 39, no. 4. Association for Computing Machinery,
2020.
ista: Sperl G, Narain R, Wojtan C. 2020. Homogenized yarn-level cloth. ACM Transactions
on Graphics. 39(4), 48.
mla: Sperl, Georg, et al. “Homogenized Yarn-Level Cloth.” ACM Transactions on
Graphics, vol. 39, no. 4, 48, Association for Computing Machinery, 2020, doi:10.1145/3386569.3392412.
short: G. Sperl, R. Narain, C. Wojtan, ACM Transactions on Graphics 39 (2020).
date_created: 2020-09-13T22:01:18Z
date_published: 2020-07-08T00:00:00Z
date_updated: 2024-02-28T12:57:47Z
day: '08'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1145/3386569.3392412
ec_funded: 1
external_id:
isi:
- '000583700300021'
file:
- access_level: open_access
checksum: cf4c1d361c3196c4bd424520a5588205
content_type: application/pdf
creator: dernst
date_created: 2020-11-23T09:01:22Z
date_updated: 2020-11-23T09:01:22Z
file_id: '8794'
file_name: 2020_hylc_submitted.pdf
file_size: 38922662
relation: main_file
success: 1
file_date_updated: 2020-11-23T09:01:22Z
has_accepted_license: '1'
intvolume: ' 39'
isi: 1
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1145/3386569.3392412
month: '07'
oa: 1
oa_version: Submitted Version
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '638176'
name: Efficient Simulation of Natural Phenomena at Extremely Large Scales
publication: ACM Transactions on Graphics
publication_identifier:
eissn:
- '15577368'
issn:
- '07300301'
publication_status: published
publisher: Association for Computing Machinery
quality_controlled: '1'
related_material:
record:
- id: '12358'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Homogenized yarn-level cloth
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 39
year: '2020'
...
---
_id: '7956'
abstract:
- lang: eng
text: When short-range attractions are combined with long-range repulsions in colloidal
particle systems, complex microphases can emerge. Here, we study a system of isotropic
particles, which can form lamellar structures or a disordered fluid phase when
temperature is varied. We show that, at equilibrium, the lamellar structure crystallizes,
while out of equilibrium, the system forms a variety of structures at different
shear rates and temperatures above melting. The shear-induced ordering is analyzed
by means of principal component analysis and artificial neural networks, which
are applied to data of reduced dimensionality. Our results reveal the possibility
of inducing ordering by shear, potentially providing a feasible route to the fabrication
of ordered lamellar structures from isotropic particles.
article_number: '204905'
article_processing_charge: No
article_type: original
author:
- first_name: J.
full_name: Pȩkalski, J.
last_name: Pȩkalski
- first_name: Wojciech
full_name: Rzadkowski, Wojciech
id: 48C55298-F248-11E8-B48F-1D18A9856A87
last_name: Rzadkowski
orcid: 0000-0002-1106-4419
- first_name: A. Z.
full_name: Panagiotopoulos, A. Z.
last_name: Panagiotopoulos
citation:
ama: 'Pȩkalski J, Rzadkowski W, Panagiotopoulos AZ. Shear-induced ordering in systems
with competing interactions: A machine learning study. The Journal of chemical
physics. 2020;152(20). doi:10.1063/5.0005194'
apa: 'Pȩkalski, J., Rzadkowski, W., & Panagiotopoulos, A. Z. (2020). Shear-induced
ordering in systems with competing interactions: A machine learning study. The
Journal of Chemical Physics. AIP Publishing. https://doi.org/10.1063/5.0005194'
chicago: 'Pȩkalski, J., Wojciech Rzadkowski, and A. Z. Panagiotopoulos. “Shear-Induced
Ordering in Systems with Competing Interactions: A Machine Learning Study.” The
Journal of Chemical Physics. AIP Publishing, 2020. https://doi.org/10.1063/5.0005194.'
ieee: 'J. Pȩkalski, W. Rzadkowski, and A. Z. Panagiotopoulos, “Shear-induced ordering
in systems with competing interactions: A machine learning study,” The Journal
of chemical physics, vol. 152, no. 20. AIP Publishing, 2020.'
ista: 'Pȩkalski J, Rzadkowski W, Panagiotopoulos AZ. 2020. Shear-induced ordering
in systems with competing interactions: A machine learning study. The Journal
of chemical physics. 152(20), 204905.'
mla: 'Pȩkalski, J., et al. “Shear-Induced Ordering in Systems with Competing Interactions:
A Machine Learning Study.” The Journal of Chemical Physics, vol. 152, no.
20, 204905, AIP Publishing, 2020, doi:10.1063/5.0005194.'
short: J. Pȩkalski, W. Rzadkowski, A.Z. Panagiotopoulos, The Journal of Chemical
Physics 152 (2020).
date_created: 2020-06-14T22:00:49Z
date_published: 2020-05-29T00:00:00Z
date_updated: 2024-02-28T13:00:28Z
day: '29'
department:
- _id: MiLe
doi: 10.1063/5.0005194
ec_funded: 1
external_id:
arxiv:
- '2002.07294'
isi:
- '000537900300001'
intvolume: ' 152'
isi: 1
issue: '20'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1063/5.0005194
month: '05'
oa: 1
oa_version: Published Version
project:
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '665385'
name: International IST Doctoral Program
publication: The Journal of chemical physics
publication_identifier:
eissn:
- '10897690'
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
related_material:
record:
- id: '10759'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: 'Shear-induced ordering in systems with competing interactions: A machine learning
study'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 152
year: '2020'
...
---
_id: '7428'
abstract:
- lang: eng
text: In the superconducting regime of FeTe(1−x)Sex, there exist two types of vortices
which are distinguished by the presence or absence of zero-energy states in their
core. To understand their origin, we examine the interplay of Zeeman coupling
and superconducting pairings in three-dimensional metals with band inversion.
Weak Zeeman fields are found to suppress intraorbital spin-singlet pairing, known
to localize the states at the ends of the vortices on the surface. On the other
hand, an orbital-triplet pairing is shown to be stable against Zeeman interactions,
but leads to delocalized zero-energy Majorana modes which extend through the vortex.
In contrast, the finite-energy vortex modes remain localized at the vortex ends
even when the pairing is of orbital-triplet form. Phenomenologically, this manifests
as an observed disappearance of zero-bias peaks within the cores of topological
vortices upon an increase of the applied magnetic field. The presence of magnetic
impurities in FeTe(1−x)Sex, which are attracted to the vortices, would lead to
such Zeeman-induced delocalization of Majorana modes in a fraction of vortices
that capture a large enough number of magnetic impurities. Our results provide
an explanation for the dichotomy between topological and nontopological vortices
recently observed in FeTe(1−x)Sex.
article_number: '020504'
article_processing_charge: No
article_type: original
author:
- first_name: Areg
full_name: Ghazaryan, Areg
id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87
last_name: Ghazaryan
orcid: 0000-0001-9666-3543
- first_name: P. L.S.
full_name: Lopes, P. L.S.
last_name: Lopes
- first_name: Pavan
full_name: Hosur, Pavan
last_name: Hosur
- first_name: Matthew J.
full_name: Gilbert, Matthew J.
last_name: Gilbert
- first_name: Pouyan
full_name: Ghaemi, Pouyan
last_name: Ghaemi
citation:
ama: Ghazaryan A, Lopes PLS, Hosur P, Gilbert MJ, Ghaemi P. Effect of Zeeman coupling
on the Majorana vortex modes in iron-based topological superconductors. Physical
Review B. 2020;101(2). doi:10.1103/PhysRevB.101.020504
apa: Ghazaryan, A., Lopes, P. L. S., Hosur, P., Gilbert, M. J., & Ghaemi, P.
(2020). Effect of Zeeman coupling on the Majorana vortex modes in iron-based topological
superconductors. Physical Review B. American Physical Society. https://doi.org/10.1103/PhysRevB.101.020504
chicago: Ghazaryan, Areg, P. L.S. Lopes, Pavan Hosur, Matthew J. Gilbert, and Pouyan
Ghaemi. “Effect of Zeeman Coupling on the Majorana Vortex Modes in Iron-Based
Topological Superconductors.” Physical Review B. American Physical Society,
2020. https://doi.org/10.1103/PhysRevB.101.020504.
ieee: A. Ghazaryan, P. L. S. Lopes, P. Hosur, M. J. Gilbert, and P. Ghaemi, “Effect
of Zeeman coupling on the Majorana vortex modes in iron-based topological superconductors,”
Physical Review B, vol. 101, no. 2. American Physical Society, 2020.
ista: Ghazaryan A, Lopes PLS, Hosur P, Gilbert MJ, Ghaemi P. 2020. Effect of Zeeman
coupling on the Majorana vortex modes in iron-based topological superconductors.
Physical Review B. 101(2), 020504.
mla: Ghazaryan, Areg, et al. “Effect of Zeeman Coupling on the Majorana Vortex Modes
in Iron-Based Topological Superconductors.” Physical Review B, vol. 101,
no. 2, 020504, American Physical Society, 2020, doi:10.1103/PhysRevB.101.020504.
short: A. Ghazaryan, P.L.S. Lopes, P. Hosur, M.J. Gilbert, P. Ghaemi, Physical Review
B 101 (2020).
date_created: 2020-02-02T23:01:01Z
date_published: 2020-01-13T00:00:00Z
date_updated: 2024-02-28T13:11:13Z
day: '13'
department:
- _id: MiLe
doi: 10.1103/PhysRevB.101.020504
external_id:
arxiv:
- '1907.02077'
isi:
- '000506843500001'
intvolume: ' 101'
isi: 1
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1907.02077
month: '01'
oa: 1
oa_version: Preprint
publication: Physical Review B
publication_identifier:
eissn:
- '24699969'
issn:
- '24699950'
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Effect of Zeeman coupling on the Majorana vortex modes in iron-based topological
superconductors
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 101
year: '2020'
...
---
_id: '8319'
abstract:
- lang: eng
text: We demonstrate that releasing atoms into free space from an optical lattice
does not deteriorate cavity-generated spin squeezing for metrological purposes.
In this work, an ensemble of 500000 spin-squeezed atoms in a high-finesse optical
cavity with near-uniform atom-cavity coupling is prepared, released into free
space, recaptured in the cavity, and probed. Up to ∼10 dB of metrologically relevant
squeezing is retrieved for 700μs free-fall times, and decaying levels of squeezing
are realized for up to 3 ms free-fall times. The degradation of squeezing results
from loss of atom-cavity coupling homogeneity between the initial squeezed state
generation and final collective state readout. A theoretical model is developed
to quantify this degradation and this model is experimentally validated.
acknowledgement: We thank N. Engelsen for comments on the manuscript. This work was
supported by the Office of Naval Research, Vannevar Bush Faculty Fellowship, Department
of Energy, and Defense Threat Reduction Agency. R.K. was partly supported by the
AQT/INQNET program at Caltech.
article_number: '012224'
article_processing_charge: No
article_type: original
author:
- first_name: Yunfan
full_name: Wu, Yunfan
last_name: Wu
- first_name: Rajiv
full_name: Krishnakumar, Rajiv
last_name: Krishnakumar
- first_name: Julián
full_name: Martínez-Rincón, Julián
last_name: Martínez-Rincón
- first_name: Benjamin K.
full_name: Malia, Benjamin K.
last_name: Malia
- first_name: Onur
full_name: Hosten, Onur
id: 4C02D85E-F248-11E8-B48F-1D18A9856A87
last_name: Hosten
orcid: 0000-0002-2031-204X
- first_name: Mark A.
full_name: Kasevich, Mark A.
last_name: Kasevich
citation:
ama: Wu Y, Krishnakumar R, Martínez-Rincón J, Malia BK, Hosten O, Kasevich MA. Retrieval
of cavity-generated atomic spin squeezing after free-space release. Physical
Review A. 2020;102(1). doi:10.1103/PhysRevA.102.012224
apa: Wu, Y., Krishnakumar, R., Martínez-Rincón, J., Malia, B. K., Hosten, O., &
Kasevich, M. A. (2020). Retrieval of cavity-generated atomic spin squeezing after
free-space release. Physical Review A. American Physical Society. https://doi.org/10.1103/PhysRevA.102.012224
chicago: Wu, Yunfan, Rajiv Krishnakumar, Julián Martínez-Rincón, Benjamin K. Malia,
Onur Hosten, and Mark A. Kasevich. “Retrieval of Cavity-Generated Atomic Spin
Squeezing after Free-Space Release.” Physical Review A. American Physical
Society, 2020. https://doi.org/10.1103/PhysRevA.102.012224.
ieee: Y. Wu, R. Krishnakumar, J. Martínez-Rincón, B. K. Malia, O. Hosten, and M.
A. Kasevich, “Retrieval of cavity-generated atomic spin squeezing after free-space
release,” Physical Review A, vol. 102, no. 1. American Physical Society,
2020.
ista: Wu Y, Krishnakumar R, Martínez-Rincón J, Malia BK, Hosten O, Kasevich MA.
2020. Retrieval of cavity-generated atomic spin squeezing after free-space release.
Physical Review A. 102(1), 012224.
mla: Wu, Yunfan, et al. “Retrieval of Cavity-Generated Atomic Spin Squeezing after
Free-Space Release.” Physical Review A, vol. 102, no. 1, 012224, American
Physical Society, 2020, doi:10.1103/PhysRevA.102.012224.
short: Y. Wu, R. Krishnakumar, J. Martínez-Rincón, B.K. Malia, O. Hosten, M.A. Kasevich,
Physical Review A 102 (2020).
date_created: 2020-08-30T22:01:10Z
date_published: 2020-07-30T00:00:00Z
date_updated: 2024-02-28T13:11:28Z
day: '30'
department:
- _id: OnHo
doi: 10.1103/PhysRevA.102.012224
external_id:
arxiv:
- '1912.08334'
isi:
- '000555104200011'
intvolume: ' 102'
isi: 1
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1912.08334
month: '07'
oa: 1
oa_version: Preprint
publication: Physical Review A
publication_identifier:
eissn:
- '24699934'
issn:
- '24699926'
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Retrieval of cavity-generated atomic spin squeezing after free-space release
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 102
year: '2020'
...