Universal cooling dynamics toward a quantum critical point

Abstract

We investigate the loss of adiabaticity when cooling a many-body quantum system from an initial thermal state toward a quantum critical point. The excitation density, which quantifies the degree of adiabaticity of the dynamics, is found to obey scaling laws in the cooling velocity as well as in the initial and final temperatures of the cooling protocol. The scaling laws are universal, governed by the critical exponents of the quantum phase transition. The validity of these statements is shown analytically for a Kitaev quantum wire coupled to Markovian baths and argued to be valid under rather general conditions. Our results establish that quantum critical properties can be probed dynamically at finite temperature, without even varying the control parameter of the quantum phase transition.

6+5 pages, 2+3 figures; companion paper to arXiv:2204.07594

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Cited by in corpus (6)

• Kibble-Zurek scaling due to environment temperature quench in the transverse field Ising model
• Kibble-Zurek scaling immune to anti-Kibble-Zurek behavior in driven open systems at the limit of loss difference
• Reducing defect production in random transverse-field Ising chains by inhomogeneous driving fields
• Universal Quench Dynamics of an Open Quantum System
• Long-range Kitaev chain in a thermal bath: Analytic techniques for time-dependent systems and environments
• Optimized adiabatic-impulse protocol preserving Kibble-Zurek scaling with attenuated anti-Kibble-Zurek behavior