Real-time simulation of large open quantum spin systems driven by dissipation

Article

关键词: BOSE-EINSTEIN CONDENSATION;    LATTICE GAUGE-THEORIES;    OPTICAL LATTICES;    ATOMS;    DYNAMICS;    COMPUTATION;    FORMULATION;    OSCILLATOR;    TRANSITION;    MECHANICS;   

DOI  :  10.1103/PhysRevB.90.241104

来源: SCIE

【 摘 要 】

We consider a large quantum system with spins 1/2 whose dynamics is driven entirely by measurements of the total spin of spin pairs. This gives rise to a dissipative coupling to the environment. When one averages over the measurement results, the corresponding real-time path integral does not suffer from a sign problem. Using an efficient cluster algorithm, we study the real-time evolution from an initial antiferromagnetic state of the two-dimensional Heisenberg model, which is driven to a disordered phase, not by a Hamiltonian, but by sporadic measurements or by continuous Lindblad evolution.

【 授权许可】

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