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arXiv · quant-ph/0410029

Nanomechanical Quantum Memory for Superconducting Qubits

Emily J. Pritchett·Michael R. Geller
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Abstract

Many protocols for quantum computation require a quantum memory element to store qubits. We discuss the accuracy with which quantum states prepared in a Josephson junction qubit can be stored in a nanoelectromechanical resonator and then transfered back to the junction. We find that the fidelity of the memory operation depends on both the junction-resonator coupling strength and the location of the state on the Bloch sphere. Although we specifically focus on a large-area, current-biased Josesphson junction phase qubit coupled to the dilatational mode of a piezoelectric nanoelectromechanical disk resonator, many our results will apply to other qubit-oscillator models.

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Emily J. Pritchett, Michael R. Geller. 2004-10-04. Nanomechanical Quantum Memory for Superconducting Qubits. https://doi.org/10.1103/physreva.72.010301

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