Quantum simulation of parity-time symmetry breaking with a superconducting quantum processor

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Abstract

The observation of genuine quantum effects in systems governed by non-Hermitian Hamiltonians has been an outstanding challenge in the field. Here we simulate the evolution under such Hamiltonians in the quantum regime on a superconducting quantum processor by using a dilation procedure involving an ancillary qubit. We observe the parity-time (PT)-symmetry breaking phase transition at the exceptional points, obtain the critical exponent, and show that this transition is associated with a loss of state distinguishability. In a two-qubit setting, we show that the entanglement can be modified by local operations.

Original languageEnglish
Article number26
Number of pages8
JournalCommunications physics
Volume4
Issue number1
DOIs
Publication statusPublished - Dec 2021
MoE publication typeA1 Journal article-refereed

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