Topological quantum interference in a pumped Su-Schrieffer-Heeger lattice
Abstract
Topological quantum interference emerges from the interplay between quantum mechanics and topology. We present evidence for two types of such interference phenomenon that can result from the quantum dynamics of initial topological states. We realize both types of topological quantum interference in a pumped non-Hermitian Su-Schrieffer-Heeger lattice that can be implemented by creation and coherent control of excitonic states of trapped neutral atoms. On quenching the system from the topological to the gapless phases and then back again, we find that interference patterns develop in the gapless phase and also after switching back to the topological phase. These patterns occur both as many-excitation interferences generated in the presence of pumping the atoms at the end sites, and as one- and two-excitation interferences seen in the absence of pumping when starting with edge excitations. Investigation of the excitation dynamics shows that these interference patterns originate from the topological nature of the initial states and are very different from quantum interferences originating from nontopological states of the lattice. Our results also reveal that unlike well-known situations where topological states are protected against local perturbations, in the non-Hermitian SSH systems resulting from driving the excited-state populations, a local dissipation at each lattice sitemore »
- Authors:
-
- University of California, Berkeley, CA (United States); Berkeley Center for Quantum Information and Computation, Berkeley, CA (United States)
- University of California, Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1969181
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review A
- Additional Journal Information:
- Journal Volume: 105; Journal Issue: 5; Journal ID: ISSN 2469-9926
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 74 ATOMIC AND MOLECULAR PHYSICS; lattice dynamics; quantum information processing; quantum interference effects; topological phases of matter
Citation Formats
Li, Zeng-Zhao, Atalaya, Juan, and Whaley, K. Birgitta. Topological quantum interference in a pumped Su-Schrieffer-Heeger lattice. United States: N. p., 2022.
Web. doi:10.1103/physreva.105.052418.
Li, Zeng-Zhao, Atalaya, Juan, & Whaley, K. Birgitta. Topological quantum interference in a pumped Su-Schrieffer-Heeger lattice. United States. https://doi.org/10.1103/physreva.105.052418
Li, Zeng-Zhao, Atalaya, Juan, and Whaley, K. Birgitta. Thu .
"Topological quantum interference in a pumped Su-Schrieffer-Heeger lattice". United States. https://doi.org/10.1103/physreva.105.052418. https://www.osti.gov/servlets/purl/1969181.
@article{osti_1969181,
title = {Topological quantum interference in a pumped Su-Schrieffer-Heeger lattice},
author = {Li, Zeng-Zhao and Atalaya, Juan and Whaley, K. Birgitta},
abstractNote = {Topological quantum interference emerges from the interplay between quantum mechanics and topology. We present evidence for two types of such interference phenomenon that can result from the quantum dynamics of initial topological states. We realize both types of topological quantum interference in a pumped non-Hermitian Su-Schrieffer-Heeger lattice that can be implemented by creation and coherent control of excitonic states of trapped neutral atoms. On quenching the system from the topological to the gapless phases and then back again, we find that interference patterns develop in the gapless phase and also after switching back to the topological phase. These patterns occur both as many-excitation interferences generated in the presence of pumping the atoms at the end sites, and as one- and two-excitation interferences seen in the absence of pumping when starting with edge excitations. Investigation of the excitation dynamics shows that these interference patterns originate from the topological nature of the initial states and are very different from quantum interferences originating from nontopological states of the lattice. Our results also reveal that unlike well-known situations where topological states are protected against local perturbations, in the non-Hermitian SSH systems resulting from driving the excited-state populations, a local dissipation at each lattice site can suppress both the topological interference and the total population of the lattice.},
doi = {10.1103/physreva.105.052418},
journal = {Physical Review A},
number = 5,
volume = 105,
place = {United States},
year = {Thu May 12 00:00:00 EDT 2022},
month = {Thu May 12 00:00:00 EDT 2022}
}
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