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

• URL: http://arxiv.org/abs/2111.12036v1
• Date: Tue, 23 Nov 2021 17:43:44 GMT
• Title: Quantum simulation of parity-time symmetry breaking with a superconducting quantum processor
• Authors: Shruti Dogra, Artem A. Melnikov, and Gheorghe Sorin Paraoanu
• Abstract summary: We simulate the evolution under such Hamiltonians in the quantum regime on a superconducting quantum processor. In a two-qubit setting, we show that the entanglement can be modified by local operations.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• 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 ($\mathcal{PT}$)-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.

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