Thursday, July 4, 2013

1307.0906 (Feng Mei et al.)

Analog Superconducting Quantum Simulator for Holstein Polarons    [PDF]

Feng Mei, Vladimir M. Stojanovic, Irfan Siddiqi, Lin Tian
We propose an analog quantum simulator for the Holstein molecular-crystal model based on a dispersive superconducting circuit QED system composed of transmon qubits and microwave resonators. By varying the circuit parameters, one can readily access both the adiabatic and the anti-adiabatic regimes of this model, and realize the coupling strengths required for small-polaron formation. We present a pumping scheme for preparing small-polaron states of arbitrary quasimomentum within time scales much shorter than the qubit decoherence time. The ground state of the system is characterized by anomalous amplitude fluctuation and measurement-based momentum squeezing in the resonator modes.
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