Quantum logical gates with four-level SQUIDs coupled to a superconducting resonator

Abstract

We propose a way for realizing a two-qubit controlled phase gate with superconducting quantum interference devices (SQUIDs) coupled to a superconducting resonator. In this proposal, the two lowest levels of each SQUID serve as the logical states and two intermediate levels of each SQUID are used for the gate realization. We show that neither adjustment of SQUID level spacings during the gate operation nor uniformity in SQUID parameters is required by this proposal. In addition, this proposal does not require the adiabatic passage or a second-order detuning and thus the gate is much faster.

6 pages, 3 figures

References in corpus (3)

• Possible realization of entanglement, logical gates and quantum information transfer with superconducting-quantum-interference-device qubits in cavity QED
• Quantum Process Tomography of a Universal Entangling Gate Implemented with Josephson Phase Qubits
• Spectroscopy on two coupled flux qubits

Cited by in corpus (4)

• Hamiltonian design to prepare arbitrary states of four-level systems
• Three qubit Grover's algorithm using superconducting quantum interference devices in cavity QED
• Multiqubit quantum phase gate using four-level superconducting quantum interference devices coupled to superconducting resonator
• Transferring multiqubit entanglement onto memory qubits in a decoherence-free subspace