Photonic quantum simulations of coupled PT-symmetric Hamiltonians
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- PhysRevResearch.4.013051
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Parity-time-symmetric (PT-symmetric) Hamiltonians are generally non-Hermitian and give rise to exotic behavior in quantum systems at exceptional points, where eigenvectors coalesce. The recent realization of PT-symmetric Hamiltonians in quantum systems has ignited efforts to simulate and investigate many-particle quantum systems across exceptional points. Here, we use a programmable integrated photonic chip to simulate a model composed of twin pairs of PT-symmetric Hamiltonians, with each the time reverse of its twin. We simulate quantum dynamics across exceptional points including two-and three-particle interference, and a particle-trembling behavior that arises due to interference between subsystems undergoing time-reversed evolutions. These results show how programmable quantum simulators can be used to investigate foundational questions in quantum mechanics.
Original language | English |
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Article number | 013051 |
Journal | Physical Review Research |
Volume | 4 |
Issue number | 1 |
Number of pages | 14 |
ISSN | 2643-1564 |
DOIs | |
Publication status | Published - 26 Jan 2022 |
ID: 307290180