High-Fidelity Resonator-Induced Phase Gate with Single-Mode Squeezing

2016/01/13 by Shruti Puri, Alexandre Blais · 1 citation
Computer Science · Physics and Astronomy · #Acoustics #Computer science #Controlled NOT gate #Dephasing #Fidelity #High fidelity #Narrowband #Neural Networks and Reservoir Computing #Optics #Optoelectronics #Phase (matter) #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum gate #Quantum mechanics #Qubit #Resonator #Telecommunications #quant-ph

paper · pdf · doi:10.1103/physrevlett.116.180501

published as Phys. Rev. Lett. 116, 180501 (2016)

arxiv created 2016/01/13 · openalex publication_date 2016/05/02 · arxiv updated 2016/05/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We propose to increase the fidelity of two-qubit resonator-induced phase gates in circuit QED by the use of narrow-band single-mode squeezing. We show that there exists an optimal squeezing angle and strength that erases qubit "which-path" information leaking out of the cavity and thereby minimizes qubit dephasing during these gates. Our analytical results for the gate fidelity are in excellent agreement with numerical simulations of a cascaded master equation that takes into account the dynamics of the source of squeezed radiation. With realistic parameters, we find that it is possible to realize a controlled-phase gate with a gate time of 200 ns and average infidelity of 10^-5.

Citations

• Quantum trajectory approach to circuit QED: Quantum jumps and the Zeno effect
• A simple all-microwave entangling gate for fixed-frequency superconducting qubits
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• A simple formula for the average gate fidelity of a quantum dynamical operation
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• Exposición sobre la reforma procesal civil a través de su aplicación práctica (1988-1993)
• Simple Pulses for Elimination of Leakage in Weakly Nonlinear Qubits
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• Quantum Computation and Quantum Information

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