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Open Quantum Systems Decoherence

Qubit-oscillator system under ultrastrong coupling and extreme driving

arXiv

Authors: Johannes Hausinger, Milena Grifoni

Year

2010

Paper ID

11374

Status

Preprint

Abstract Read

~2 min

Abstract Words

102

Citations

N/A

Abstract

We introduce an approach to studying a driven qubit-oscillator system in the ultrastrong coupling regime, where the ratio g/Ω between coupling strength and oscillator frequency approaches unity or goes beyond, and simultaneously for driving strengths much bigger than the qubit energy splitting (extreme driving). Both qubit-oscillator coupling and external driving lead to a dressing of the qubit tunneling matrix element of different nature: the former can be used to suppress selectively certain oscillator modes in the spectrum, while the latter can bring the qubit's dynamics to a standstill at short times (coherent destruction of tunneling) even in the case of ultrastrong coupling.

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We introduce an approach to studying a driven qubit-oscillator system in the ultrastrong coupling regime, where the ratio g/Ω between coupling strength and oscillator frequency...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1009.1485 [2] arXiv https://arxiv.org/abs/1009.1485 [3] Publisher https://arxiv.org/abs/1009.1485

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