Real-time simulation of large open quantum spin systems driven by measurements
Real-time simulation of large open quantum spin systems driven by measurements
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.
Banerjee, D.
dcc5d706-d0ed-40b7-94f6-a4ddd7d41646
Jiang, Fu-Jiun
b7c05c06-77aa-4503-b0a3-9e5115fe09bd
Kon, Mark
402c251f-0104-40cb-937c-eae2fc593f0c
Wiese, Uwe-Jens
8eefe3bf-4b8a-4980-9d15-313982d40fe0
2 December 2014
Banerjee, D.
dcc5d706-d0ed-40b7-94f6-a4ddd7d41646
Jiang, Fu-Jiun
b7c05c06-77aa-4503-b0a3-9e5115fe09bd
Kon, Mark
402c251f-0104-40cb-937c-eae2fc593f0c
Wiese, Uwe-Jens
8eefe3bf-4b8a-4980-9d15-313982d40fe0
Banerjee, D., Jiang, Fu-Jiun, Kon, Mark and Wiese, Uwe-Jens
(2014)
Real-time simulation of large open quantum spin systems driven by measurements.
Physical Review B, 90, [241104(R)].
(doi:10.1103/PhysRevB.90.241104).
Abstract
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.
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Published date: 2 December 2014
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Local EPrints ID: 500304
URI: http://eprints.soton.ac.uk/id/eprint/500304
PURE UUID: 7bec15ad-359e-41b1-a33d-559ee026fa80
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Date deposited: 24 Apr 2025 16:37
Last modified: 25 Apr 2025 02:11
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Author:
D. Banerjee
Author:
Fu-Jiun Jiang
Author:
Mark Kon
Author:
Uwe-Jens Wiese
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