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Engineering entangled microwave photon states through multiphoton interactions between two cavity fields and a superconducting qubit.

ABSTRACT: It has been shown that there are not only transverse but also longitudinal couplings between microwave fields and a superconducting qubit with broken inversion symmetry of the potential energy. Using multiphoton processes induced by longitudinal coupling fields and frequency matching conditions, we design a universal algorithm to produce arbitrary superpositions of two-mode photon states of microwave fields in two separated transmission line resonators, which are coupled to a superconducting qubit. Based on our algorithm, we analyze the generation of evenly-populated states and NOON states. Compared to other proposals with only single-photon process, we provide an efficient way to produce entangled microwave photon states when the interactions between superconducting qubits and microwave fields are in the strong and ultrastrong regime.

SUBMITTER: Zhao YJ

PROVIDER: S-EPMC4817062 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature

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Engineering entangled microwave photon states through multiphoton interactions between two cavity fields and a superconducting qubit.

Zhao Yan-Jun YJ Wang Changqing C Zhu Xiaobo X Liu Yu-xi YX

Scientific reports 20160401

It has been shown that there are not only transverse but also longitudinal couplings between microwave fields and a superconducting qubit with broken inversion symmetry of the potential energy. Using multiphoton processes induced by longitudinal coupling fields and frequency matching conditions, we design a universal algorithm to produce arbitrary superpositions of two-mode photon states of microwave fields in two separated transmission line resonators, which are coupled to a superconducting qub ...[more]

PMID: 27033558

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