Entanglement spectroscopy of a driven solid-state qubit and its detector

Details Entanglement spectroscopy of a driven solid-state qubit and its detector Entanglement spectroscopy of a driven solid-state qubit and its detector

2004-05-11

arxiv.org/abs/cond-mat/0405220v2

Phys. Rev. Lett. 93, 267005 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.93.267005

We study the asymptotic dynamics of a driven quantum two level system coupled via a quantum detector to the environment. We find multi-photon resonances which are due to the entanglement of the qubit and the detector. Different regimes are studied by employing a perturbative Floquet-Born-Markov approach for the qubit+detector system, as well as non-perturbative real-time path integral schemes for the driven spin-boson system. We find analytical results for the resonances, including the red and the blue sidebands. They agree well with those of exact ab-initio calculations.

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