Quantum Critical Scaling under Periodic Driving

Abstract

Universality is key to the theory of phase transition stating that the equilibrium properties of observables near a phase transition can be classified according to few critical exponents. These exponents rule an universal scaling behaviour that witnesses the irrelevance of the model's microscopic details at criticality. Here we discuss the persistence of such a scaling in a one-dimensional quantum Ising model under sinusoidal modulation in time of its transverse magnetic field. We show that scaling of various quantities (concurrence, entanglement entropy, magnetic and fidelity susceptibility) endures up to a stroboscopic time ${\tau }_{bd}$, proportional to the size of the system. This behaviour is explained by noticing that the low-energy modes, responsible for the scaling properties, are resilient to the absorption of energy. Our results suggest that relevant features of the universality do hold also when the system is brought out-of-equilibrium by a periodic driving.

11 pages, 7 figures

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• Entanglement Measures in a Nonequilibrium Steady State: Exact Results in One Dimension
• Dynamics of spin-momentum entanglement from superradiant phase transitions
• State-dependent mobility edge in kinetically constrained models
• Enhancing the Charging Performance of Many-Body Quantum Batteries through Landau-Zener Driving
• Coexistence of different scaling laws for the entanglement entropy in a periodically driven system