Work

Half-integer Shapiro-steps in superconducting qubit with a π-Josephson junction

Year: 2021

Type: article

Abstract: A superconducting quantum interference device (SQUID) comprising 0- and π-Josephson junctions (JJs), called π-SQUID, is studied by the resistively shunted junction model. The π-SQUID shows half-integer Shapiro-steps (SS) under microwave irradiation at the voltage V = ( ℏ / 2 e ) Ω ( n / 2 ) , with angular frequency Ω and half-integer n/2 in addition to integer n. We show that the π-SQUID can be a π-qubit with spontaneous loop currents by which the half-integer SS are induced. Making the 0- and π-JJs equivalent is a key for the half-integer SS and realizing the π-qubit.

Source: Applied Physics Express

DOI: 10.35848/1882-0786/ac211d

Authors: Michiyasu Mori, Sadamichi Maekawa

Institutions: Japan Atomic Energy Agency, Advanced Science Research Center, Kavli Institute for Theoretical Sciences, RIKEN Center for Emergent Matter Science, University of Chinese Academy of Sciences

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $1,500