Phase gate of one superconducting qubit simultaneously controlling n qubits in a cavity

Abstract

We propose how to realize a three-step controlled-phase gate of one superconducting qubit simultaneously controlling n qubits selected from N qubits in a cavity (1<n<N). The operation time of this gate is independent of the number n of qubits involved in the gate operation. This phase gate controlling at once n qubits is insensitive to the initial state of the cavity mode and can be used to produce an analogous CNOT gate simultaneously acting on n qubits.

This paper arXiv:0907.4201 is the shorter (just four pages) version of our published paper arXiv:0912.4242 (which has 21 pages)

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• One-step implementation of multiqubit phase gate with one control qubit and multiple target qubits in coupled cavities
• Preparation of n-qubit Greenberger-Horne-Zeilinger entangled states in cavity QED: An approach with tolerance to nonidentical qubit-cavity coupling constants
• Single-step implementation of a multiple-target-qubit controlled phase gate without need of classical pulses
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• Circuit QED with qutrit: coupling three or more atoms via virtual photon exchange
• Single-step implementation of a hybrid controlled-NOT gate with one superconducting qubit simultaneously controlling multiple target cat-state qubits
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• Transferring arbitrary d-dimensional quantum states of a superconducting qudit in circuit QED
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• Multiqubit quantum phase gate using four-level superconducting quantum interference devices coupled to superconducting resonator
• Realization of quantum gates with multiple control qubits or multiple target qubits in a cavity
• Landau-Zener-Stückelberg Spectroscopy of a Superconducting Flux Qubit
• Quantum non-demolition measurement of an electron spin qubit through its low-energy many-body spin environment
• Realizing flexible two-qubit controlled phase gate with a hybrid solid-state system
• A proposal for implementing an n-qubit controlled-rotation gate with three-level superconducting qubit systems in cavity QED
• Simplify proposal for realizing multiqubit tunable phase gate in circuit QED
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• Proposal for implementing the three-qubit refined Deutsch-Jozsa quantum algorithm
• Realizing an $n$-target-qubit controlled phase gate in cavity QED: An approach without classical pulses
• Transferring entangled states of photonic cat-state qubits in circuit QED
• Circuit QED: Implementation of the three-qubit refined Deutsch-Jozsa quantum algorithm
• Multi-target-qubit unconventional geometric phase gate in a multi-cavity system