Evidence map›Paper›PMID 31993125›Full record

ArticleLight, science & applications2020

Measuring a dynamical topological order parameter in quantum walks.

Xiao-Ye Xu, Qin-Qin Wang, Markus Heyl, Jan Carl Budich, Wei-Wei Pan, Zhe Chen, Munsif Jan, Kai Sun, Jin-Shi Xu, Yong-Jian Han and 2 more

Abstract read
In one paragraph

Article in Light, science & applications, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

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2 · The registry

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3 · Its place in the literature

Who cites it

5 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors.

Xiao-Ye Xu1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026 China.
Qin-Qin Wang1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026 China.
Markus Heyl3Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Straße 38, D-01187 Dresden, Germany.
Jan Carl Budich4Institute of Theoretical Physics, Technische Universität Dresden, 01062 Dresden, Germany.
Wei-Wei Pan1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026 China.
Zhe Chen1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026 China.
Munsif Jan1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026 China.
Kai Sun1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026 China.
Jin-Shi Xu1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026 China.
Yong-Jian Han1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026 China.
Chuan-Feng Li1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026 China.
Guang-Can Guo1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026 China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Quantum processes of inherent dynamical nature, such as quantum walks, defy a description in terms of an equilibrium statistical physics ensemble. Until now, identifying the general principles behind the underlying unitary quantum dynamics has remained a key challenge. Here, we show and experimentally observe that split-step quantum walks admit a characterization in terms of a dynamical topological order parameter (DTOP). This integer-quantized DTOP measures, at a given time, the winding of the geometric phase accumulated by the wavefunction during a quantum walk. We observe distinct dynamical regimes in our experimentally realized quantum walks, and each regime can be attributed to a qualitatively different temporal behavior of the DTOP. Upon identifying an equivalent many-body problem, we reveal an intriguing connection between the nonanalytic changes of the DTOP in quantum walks and the occurrence of dynamical quantum phase transitions.

Indexed as

Quantum opticsSingle photons and quantum effectsUltrafast photonics

Identifiers

PMID31993125
PMCPMC6971032

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