Qubit-oscillator dynamics in the dispersive regime: Analytical theory beyond the rotating-wave approximation

By D. Zueco, G. M. Reuther, S. Kohler, P. Hänggi. 2009

169 citations recorded by the source corpus.

We generalize the dispersive theory of the Jaynes-Cummings model beyond the frequently employed rotating-wave approximation (RWA) in the coupling between the two-level system and the resonator. For a detuning sufficiently larger than the qubit-oscillator coupling, we diagonalize the non-RWA Hamiltonian and discuss the differences to the known RWA results. Our results extend the regime in which dispersive qubit readout is possible. If several qubits are coupled to one resonator, an effective qubit-qubit interaction of Ising type emerges, whereas RWA leads to isotropic $XY$ interaction. This impacts on the entanglement characteristics of the qubits.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/c57fd6d500d708cc10a9af9b4953c7676974cd6c

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In Artificial Intelligence

1. Franco Nori
2. Adam Miranowicz
3. Anton Frisk Kockum
4. Yu-xi Liu
5. X. Gu
6. Sahel Ashhab
7. J. You
8. I. Georgescu

In Atomic and Molecular Physics, and Optics

1. Adam Miranowicz
2. Franco Nori
3. Yu-xi Liu
4. Anton Frisk Kockum
5. X. Gu
6. Sahel Ashhab
7. J. You
8. I. Georgescu

Citations in the corpus

• Microwave photonics with superconducting quantum circuits (2017, methodology): “For example, in the dispersive regime of the quantum Rabi model, when g |ωq − ωr|, one can apply the unitary transformation [429, 436]”