Realization of quantum gates with multiple control qubits or multiple target qubits in a cavity

Abstract

In this paper, we propose a scheme to realize three-qubit controlled phase gate and multiqubit controlled-NOT gate of one qubit simultaneously controlling n target qubit with four level quantum system in a cavity. Adjustment of level spacing during the gates implementation is not required. Implementation time for multiqubit controlled NOT gate is independent of number of qubit. Three-qubit phase gate is generalized to n-qubit phase gate with multiple control qubit and the number of steps (complexity) reduces linearly as compare to conventional gate decomposition method. Our scheme can be applied to various types of physical systems such as superconducting qubits coupled to resonator and trapped atoms in a cavity. Experimental possibility of our approach is also presented.

9 pages, 8 figures, Quantum Inf Process, 2015

References in corpus (7)

• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Implementation of a Toffoli Gate with Superconducting Circuits
• Realization of the quantum Toffoli gate with trapped ions
• Using Sideband Transitions for Two-Qubit Operations in Superconducting Circuits
• Quantum two-level systems in Josephson junctions as naturally formed qubits
• Three qubit Grover's algorithm using superconducting quantum interference devices in cavity QED
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Cited by in corpus (4)

• Single-step implementation of a hybrid controlled-NOT gate with one superconducting qubit simultaneously controlling multiple target cat-state qubits
• Quantum-accelerated algorithms for generating random primitive polynomials over finite fields
• Vibration-Assisted Multi-Photon Resonance and Multi-Ion Excitation
• Dynamics and multiqubit entanglement in distant resonators