We study a flux qubit made of a superconducting loop interrupted by three Josephson junctions, which is subject to a temperature gradient. We show that the heat current induced by the temperature gradient, being sensitive to the superconducting phase differences at the junctions, depends significantly on the state of the qubit. We furthermore investigate the impact of the heat current on the coherence properties of the qubit state. We have found that even small temperature gradients can lead to dephasing times of the order of microseconds for the Delft-qubit design.

SPILLA, S., HASSLER, F., SPLETTSTOESSER, J. (2014). Measurement and dephasing of a flux qubit due to heat currents. NEW JOURNAL OF PHYSICS, 16 [10.1088/1367-2630/16/4/045020].

Measurement and dephasing of a flux qubit due to heat currents

SPILLA, Samuele;
2014-01-01

Abstract

We study a flux qubit made of a superconducting loop interrupted by three Josephson junctions, which is subject to a temperature gradient. We show that the heat current induced by the temperature gradient, being sensitive to the superconducting phase differences at the junctions, depends significantly on the state of the qubit. We furthermore investigate the impact of the heat current on the coherence properties of the qubit state. We have found that even small temperature gradients can lead to dephasing times of the order of microseconds for the Delft-qubit design.
2014
Settore FIS/03 - Fisica Della Materia
SPILLA, S., HASSLER, F., SPLETTSTOESSER, J. (2014). Measurement and dephasing of a flux qubit due to heat currents. NEW JOURNAL OF PHYSICS, 16 [10.1088/1367-2630/16/4/045020].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/92384
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