References & Citations
Quantum Physics
Title: Demonstration of a parity-time symmetry breaking phase transition using superconducting and trapped-ion qutrits
(Submitted on 31 Oct 2023 (v1), last revised 27 Mar 2024 (this version, v3))
Abstract: Scalable quantum computers hold the promise to solve hard computational problems, such as prime factorization, combinatorial optimization, simulation of many-body physics, and quantum chemistry. While being key to understanding many real-world phenomena, simulation of non-conservative quantum dynamics presents a challenge for unitary quantum computation. In this work, we focus on simulating non-unitary parity-time symmetric systems, which exhibit a distinctive symmetry-breaking phase transition as well as other unique features that have no counterpart in closed systems. We show that a qutrit, a three-level quantum system, is capable of realizing this non-equilibrium phase transition. By using two physical platforms -- an array of trapped ions and a superconducting transmon -- and by controlling their three energy levels in a digital manner, we experimentally simulate the parity-time symmetry-breaking phase transition. Our results indicate the potential advantage of multi-level (qudit) processors in simulating physical effects, where additional accessible levels can play the role of a controlled environment.
Submission history
From: Aleksey Fedorov [view email][v1] Tue, 31 Oct 2023 13:10:43 GMT (4915kb,D)
[v2] Fri, 1 Mar 2024 14:33:26 GMT (5130kb,D)
[v3] Wed, 27 Mar 2024 08:46:42 GMT (5130kb,D)
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