One-step implementation of multiqubit phase gate with one control qubit and multiple target qubits in coupled cavities

Abstract

We propose a one-step scheme to implement a multiqubit controlled phase gate of one qubit simultaneously controlling multiple qubits with three-level atoms at distant nodes in coupled cavity arrays. The selective qubit-qubit couplings are achieved by adiabatically eliminating the atomic excited states and photonic states and the required phase shifts between the control qubit and any target qubit can be realized through suitable choices of the parameters of the external fields. Moreover, the effective model is robust against decoherence because neither the atoms nor the field modes during the gate operation are excited, leading to a useful step toward scalable quantum computing networks.

10 pages, 1 figure, to appear in Optics Letters

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Cited by in corpus (10)

• Construction of robust Rydberg controlled-phase gates
• Self-error-corrected hyperparallel photonic quantum computation working with both the polarization and the spatial-mode degrees of freedom
• Single-step implementation of a hybrid controlled-NOT gate with one superconducting qubit simultaneously controlling multiple target cat-state qubits
• Circuit QED: single-step realization of a multiqubit controlled phase gate with one microwave photonic qubit simultaneously controlling $n-1$ microwave photonic qubits
• Multiplex-controlled phase gate with qubits distributed in a multi-cavity system
• One-step implementation of a multi-target-qubit controlled-phase gate with photonic qubits encoded via eigenstates of the photon-number parity operator
• Multiple multi-control unitary operations: implementation and applications
• Topological quantum walks in cavity-based quantum networks
• Transferring entangled states of photonic cat-state qubits in circuit QED
• One-step implementation of a multi-target-qubit controlled phase gate with cat-state qubits in circuit QED