Quantum Mpemba Effect in Long-Range Spin Systems
University of Electro-Communications · Scuola Internazionale Superiore di Studi Avanzati
Abstract
One of the manifestations of the quantum Mpemba effect (QME) is that a tilted ferromagnet exhibits faster restoration of the spin-rotational symmetry after a quantum quench when starting from a larger tilt angle. This phenomenon has recently been observed experimentally in an ion trap that simulates a long-range spin chain. However, the underlying mechanism of the QME in the presence of long-range interactions remains unclear. Using the time-dependent spin-wave theory, we investigate the dynamical restoration of the spin-rotational symmetry and the QME in generic long-range spin systems. We show that quantum fluctuations of the magnetization drive the restoration of symmetry by melting the initial…
Citation impact
- FWCI
- 103.21
- Percentile
- 100%
- References
- 84
Authors
2Topics & keywords
- Ferromagnetism
- Quantum
- Symmetry (geometry)
- Spin (aerodynamics)
- Quantum fluctuation
- Tilt (camera)
- Magnetization
- Symmetry breaking