Preparation of multi-photon Fock states and quantum entanglement properties in circuit QED

doi:10.1088/1674-1056/23/4/040307

Abstract We demonstrate the controllable generation of multi-photon Fock states in circuit quantum electrodynamics (circuit QED). The external bias flux regulated by a counter can effectively adjust the bias time on each superconducting flux qubit so that each flux qubit can pass in turn through the circuit cavity and thereby avoid the effect of decoherence. We further investigate the quantum correlation dynamics of coupling superconducting qubits in a Fock state. The results reveal that the lower the photon number of the light field in the number state, the stronger the interaction between qubits is, then the more beneficial to maintaining entanglement between qubits it will be.

Keywords: circuit quantum electrodynamics multi-photon Fock state preparation of quantum state concurrence

Received: 09 July 2013
Revised: 30 September 2013
Accepted manuscript online:

PACS:	03.65.Ta	(Foundations of quantum mechanics; measurement theory)
	03.65.Ud	(Entanglement and quantum nonlocality)
	03.67.-a	(Quantum information)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11264015).

Corresponding Authors: Hu Ju-Ju
E-mail: ahmxhxtt@aliyun.com

About author: 03.65.Ta; 03.65.Ud; 03.67.-a

Cite this article:

Ji Ying-Hua (嵇英华), Hu Ju-Ju (胡菊菊) Preparation of multi-photon Fock states and quantum entanglement properties in circuit QED 2014 Chin. Phys. B 23 040307

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