Norifumi Matsumoto, Masaya Nakagawa, Masahito Ueda
Published 2020-12-24Version 1
The Yang-Lee edge singularity is a quintessential nonunitary critical phenomenon accompanied by anomalous scaling laws. However, an imaginary magnetic field involved in this critical phenomenon makes its physical realization difficult. We invoke the quantum-classical correspondence to embed the Yang-Lee edge singularity in a larger quantum system with an ancilla qubit, and demonstrate a physical realization of the nonunitary quantum criticality in an open quantum system.
Comments: 6 + 6 pages, 1 + 0 figure
Experimental observation of the Yang-Lee quantum criticality in open systems
Theory of classical metastability in open quantum systems
Speed limits of the trace distance in the interaction picture for open quantum system
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