Experimental Demonstration of a Resonator-Induced Phase Gate in a Multiqubit Circuit-QED System.

Autor: Paik H; IBM T. J. Watson Research Center, Yorktown Heights, New York 10598-0218, USA., Mezzacapo A; IBM T. J. Watson Research Center, Yorktown Heights, New York 10598-0218, USA., Sandberg M; IBM T. J. Watson Research Center, Yorktown Heights, New York 10598-0218, USA., McClure DT; IBM T. J. Watson Research Center, Yorktown Heights, New York 10598-0218, USA., Abdo B; IBM T. J. Watson Research Center, Yorktown Heights, New York 10598-0218, USA., Córcoles AD; IBM T. J. Watson Research Center, Yorktown Heights, New York 10598-0218, USA., Dial O; IBM T. J. Watson Research Center, Yorktown Heights, New York 10598-0218, USA., Bogorin DF; Department of Physics, Syracuse University, Syracuse, New York 13244-1130, USA., Plourde BL; Department of Physics, Syracuse University, Syracuse, New York 13244-1130, USA., Steffen M; IBM T. J. Watson Research Center, Yorktown Heights, New York 10598-0218, USA., Cross AW; IBM T. J. Watson Research Center, Yorktown Heights, New York 10598-0218, USA., Gambetta JM; IBM T. J. Watson Research Center, Yorktown Heights, New York 10598-0218, USA., Chow JM; IBM T. J. Watson Research Center, Yorktown Heights, New York 10598-0218, USA.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2016 Dec 16; Vol. 117 (25), pp. 250502. Date of Electronic Publication: 2016 Dec 13.
DOI: 10.1103/PhysRevLett.117.250502
Abstrakt: The resonator-induced phase (RIP) gate is an all-microwave multiqubit entangling gate that allows a high degree of flexibility in qubit frequencies, making it attractive for quantum operations in large-scale architectures. We experimentally realize the RIP gate with four superconducting qubits in a three-dimensional circuit-QED architecture, demonstrating high-fidelity controlled-z (cz) gates between all possible pairs of qubits from two different 4-qubit devices in pair subspaces. These qubits are arranged within a wide range of frequency detunings, up to as large as 1.8 GHz. We further show a dynamical multiqubit refocusing scheme in order to isolate out 2-qubit interactions, and combine them to generate a 4-qubit Greenberger-Horne-Zeilinger state.
Databáze: MEDLINE
Externí odkaz: