Dynamics of Coupled Qubits Interacting with an Off-Resonant Cavity

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dc.creatorGywat, Oliver
dc.creatorMeier, Florian
dc.creatorLoss, Daniel
dc.creatorAwschalom, D. D.
dc.date2005-11-24
dc.date2006-03-27
dc.date.accessioned2026-07-07T06:49:23Z
dc.date.available2026-07-07T06:49:23Z
dc.descriptionWe study a model for a pair of qubits which interact with a single off-resonant cavity mode and, in addition, exhibit a direct inter-qubit coupling. Possible realizations for such a system include coupled superconducting qubits in a line resonator as well as exciton states or electron spin states of quantum dots in a cavity. The emergent dynamical phenomena are strongly dependent on the relative energy scales of the inter-qubit coupling strength, the coupling strength between qubits and cavity mode, and the cavity mode detuning. We show that the cavity mode dispersion enables a measurement of the state of the coupled-qubit system in the perturbative regime. We discuss the effect of the direct inter-qubit interaction on a cavity-mediated two-qubit gate. Further, we show that for asymmetric coupling of the two qubits to the cavity, the direct inter-qubit coupling can be controlled optically via the ac Stark effect.
dc.description13 pages, 5 figures. v2: minor additions and minor numerical error in Eq. (32) corrected
dc.identifierhttps://arxiv.org/abs/cond-mat/0511592
dc.identifierhttp://arxiv.org/abs/cond-mat/0511592
dc.identifierPhys. Rev. B 73, 125336 (2006)
dc.identifierdoi:10.1103/PhysRevB.73.125336
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/104322
dc.subjectMesoscale and Nanoscale Physics
dc.subjectQuantum Physics
dc.titleDynamics of Coupled Qubits Interacting with an Off-Resonant Cavity
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