TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.17.5.139
TI  - Out-of-equilibrium full counting statistics in Gaussian theories of quantum magnets
PY  - 2024/11/20
UR  - https://scipost.org/SciPostPhys.17.5.139
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 17
IS  - 5
SP  - 139
A1  - Senese, Riccardo
AU  - Robertson, Jacob
AU  - Essler, Fabian
AB  - We consider the probability distributions of the subsystem (staggered) magnetization in ordered and disordered models of quantum magnets in D dimensions. We focus on Heisenberg antiferromagnets and long-range transverse-field Ising models as particular examples. By employing a range of self-consistent time-dependent mean-field approximations in conjunction with Holstein-Primakoff, Dyson-Maleev, Schwinger boson and modified spin-wave theory representations we obtain results in thermal equilibrium as well as during non-equilibrium evolution after quantum quenches. To extract probability distributions we derive a simple formula for the characteristic function of generic quadratic observables in any Gaussian theory of bosons.
ER  -

@Article{10.21468/SciPostPhys.17.5.139,
	title={{Out-of-equilibrium full counting statistics in Gaussian theories of quantum magnets}},
	author={Riccardo Senese and Jacob H. Robertson and Fabian H. L. Essler},
	journal={SciPost Phys.},
	volume={17},
	pages={139},
	year={2024},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.17.5.139},
	url={https://scipost.org/10.21468/SciPostPhys.17.5.139},
}