Work

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

Year: 2014

Type: article

Abstract: We consider a large quantum system with spins $\frac{1}{2}$ 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.

Source: Physical Review B

DOI: 10.1103/physrevb.90.241104

Authors: D. Banerjee, F.-J. Jiang, M. Kon, U.-J. Wiese

Institutions: University of Bern, National Taiwan Normal University, Boston University

Language: English

Topic: Quantum many-body systems

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: European Research Council, Seventh Framework Programme

Awards: G297885364, G6211040728