Engineering entangled microwave photon states via 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 states when the interactions between superconducting qubits and microwave fields are in the ultrastrong regime.

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Cited by in corpus (8)

• Microwave photonics with superconducting quantum circuits
• One-step implementation of a hybrid Fredkin gate with quantum memories and single superconducting qubit in circuit QED and its applications
• Entangling two oscillators with arbitrary asymmetric initial states
• Frequency-renormalized multipolaron expansion for the quantum Rabi model
• Genuine non-Gaussian entanglement of light and quantum coherence for an atom from noisy multiphoton spin-boson interactions
• Parity-assisted generation of nonclassical states of light in circuit quantum electrodynamics
• Creation of superposition of arbitrary states encoded in two three-dimensional cavities
• Circuit QED: Cross-Kerr-effect induced by a superconducting qutrit without classical pulses