Photonic quantum simulations of coupled PT-symmetric Hamiltonians

Nicola Maraviglia, Patrick Yard, Ross Wakefield, Jacques Carolan, Chris Sparrow, Levon Chakhmakhchyan, Chris Harrold, Toshikazu Hashimoto, Nobuyuki Matsuda, Andrew K. Harter, Yogesh N. Joglekar, Anthony Laing

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

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 languageEnglish
Article number013051
JournalPhysical Review Research
Volume4
Issue number1
DOIs
Publication statusPublished - 2022 Mar

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