Tunable quantum gate between a superconducting atom and a propagating microwave photon

Abstract

We propose a two-qubit quantum logic gate between a superconducting atom and a propagating microwave photon. The atomic qubit is encoded on its lowest two levels and the photonic qubit is encoded on its carrier frequencies. The gate operation completes deterministically upon reflection of a photon, and various two-qubit gates (SWAP, $\sqrt{\mathrm{SWAP}}$, and Identity) are realized through {\it in situ} control of the drive field. The proposed gate is applicable to construction of a network of superconducting atoms, which enables gate operations between non-neighboring atoms.

8 pages, 4 figures

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Cited by in corpus (11)

• Microwave photonics with superconducting quantum circuits
• Single-Shot Quantum Non-Demolition Detection of Itinerant Microwave Photons
• Observation of dressed states of distant atoms with delocalized photons in coupled-cavities quantum electrodynamics
• Entanglement-efficient bipartite-distributed quantum computing
• Implementations of more general solid-state (SWAP)${}^{1/m}$ and controlled-(swap)${}^{1/m}$ gates
• Generation of optical Fock and W states with single-atom-based bright quantum scissors
• Coherent population transfer with polariton states in circuit QED
• Characterising Polariton States in Non-Dispersive Regime of Circuit Quantum Electrodynamics
• Nonreciprocal microwave transmission based on Gebhard-Ruckenstein hopping
• Demonstration of deterministic SWAP gate between superconducting and frequency-encoded microwave-photon qubits
• Quantum state transfer between a frequency-encoded photonic qubit and a quantum dot spin in a nanophotonic waveguide