Quantum adiabatic elimination at arbitrary order for photon number measurement
Quantum Physics
2020-01-09 v1
Abstract
Adiabatic elimination is a perturbative model reduction technique based on timescale separation and often used to simplify the description of composite quantum systems. We here analyze a quantum experiment where the perturbative expansion can be carried out to arbitrary order, such that: (i) we can formulate in the end an exact reduced model in quantum form; (ii) as the series provides accuracy for ever larger parameter values, we can discard any condition on the timescale separation, thereby analyzing the intermediate regime where the actual experiment is performing best; (iii) we can clarify the role of some gauge degrees of freedom in this model reduction technique.
Cite
@article{arxiv.2001.02550,
title = {Quantum adiabatic elimination at arbitrary order for photon number measurement},
author = {Alain Sarlette and Pierre Rouchon and Antoine Essig and Quentin Ficheux and Benjamin Huard},
journal= {arXiv preprint arXiv:2001.02550},
year = {2020}
}