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Open Quantum Systems Decoherence
Embedding the Yang-Lee Quantum Criticality in Open Quantum Systems
arXiv
Authors: Norifumi Matsumoto, Masaya Nakagawa, Masahito Ueda
Year
2020
Paper ID
551
Status
Preprint
Abstract Read
~2 min
Abstract Words
83
Citations
N/A
Abstract
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 implementation difficult. By invoking the quantum-classical correspondence to embed the Yang-Lee edge singularity in a quantum system with an ancilla qubit, we demonstrate a physical realization of the nonunitary quantum criticality in an open quantum system. Here the nonunitary criticality is identified with the singularity at an exceptional point caused by postselection of quantum measurement.
Why This Paper Matters
- This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
- It adds a 2020 reference point for readers tracking recent quantum research.
- The Yang-Lee edge singularity is a quintessential nonunitary critical phenomenon accompanied by anomalous scaling laws.
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