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

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2021-12
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Language
en
Pages
8
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Communications physics, Volume 4, issue 1
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.
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| openaire: EC/H2020/862644/EU//QUARTET
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Citation
Dogra , S , Melnikov , A A & Paraoanu , G S 2021 , ' Quantum simulation of parity-time symmetry breaking with a superconducting quantum processor ' , Communications Physics , vol. 4 , no. 1 , 26 . https://doi.org/10.1038/s42005-021-00534-2