Phys. Rev. Lett. 93, 267005 (2004) [4 pages]Entanglement Spectroscopy of a Driven Solid-State Qubit and Its DetectorReceived 11 May 2004; published 21 December 2004 We study the asymptotic dynamics of a driven quantum two-level system coupled via a quantum detector to the environment. We find multiphoton 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 nonperturbative 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. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.267005
DOI:
10.1103/PhysRevLett.93.267005
PACS:
74.50.+r, 03.65.Yz, 03.67.Lx, 42.50.Hz
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