Microwave-based arbitrary cphase gates for transmon qubits

Published

January 17, 2020

Author(s)

George S. Barron, Fernando A. Calderon-Vargas, Junling Long, David P. Pappas, Sophia E. Economou

Abstract

Superconducting transmon qubits are of great interest for quantum computing and quantum simulation. A key component of quantum chemistry simulation algorithms is breaking up the evolution into small steps, which naturally leads to the need for nonmaximally entangling, arbitrary cphase gates. Here we design such microwave-based gates using an analytically solvable approach leading to smooth, simple pulses. We use the local invariants of the evolution operator in SU(4) to develop a method of constructing pulse protocols, which allows for the continuous tuning of the phase. We find cphase fidelities of more than 0.999 and gate times as low as 100ns.

Citation

Physical Review B

Volume

101

Pub Type

Journals

Download Paper

https://doi.org/10.1103/PhysRevB.101.054508

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Keywords

superconducting transmon qubits, quantum computing, quantum simulation, nonmaximally entangling, arbitrary cphase gates, analytically solvable approach, pulse protocols

Citation

Barron, G. , Calderon-Vargas, F. , Long, J. , Pappas, D. and Economou, S. (2020), Microwave-based arbitrary cphase gates for transmon qubits, Physical Review B, [online], https://doi.org/10.1103/PhysRevB.101.054508, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=929691 (Accessed October 15, 2025)