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Fisher zeros and persistent temporal oscillations in non-unitary quantum circuits
- Source :
- Phys. Rev. Research 4, 013018 (2022)
- Publication Year :
- 2021
-
Abstract
- We present a quantum circuit with measurements and post-selection that exhibits a panoply of space- and/or time-ordered phases, from ferromagnetic order to spin-density waves to time crystals. Unlike the time crystals that have been found in unitary models, those that occur here are \emph{incommensurate} with the drive frequency. The period of the incommensurate time-crystal phase may be tuned by adjusting the circuit parameters. We demonstrate that the phases of our quantum circuit, including the inherently non-equilibrium dynamical ones, correspond to complex-temperature equilibrium phases of the exactly solvable square-lattice anisotropic Ising model.<br />Comment: v1-->v2: significantly revised, new co-author added; small typo fixed in the most recent version 3
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Research 4, 013018 (2022)
- Publication Type :
- Report
- Accession number :
- edsarx.2103.10628
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevResearch.4.013018