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Josephson vortex interaction mediated by cavity modes : Tunable coupling for superconducting qubits

Fistul, M. V.; Ustinov, A. V.

A quantum-mechanical model for the interaction of Josephson vortices (fluxons) embedded in a superconducting transmission line is presented. The vortices interact through emission and absorption of linear waves (electromagnetic cavity modes). We show that in a classical regime this peculiar type of interaction is determined by the product of instantaneous velocities of fluxons. In a quantum regime, this property provides tunable coupling between vortices which can be used for entanglement of vortex qubits. The physical mechanism of the vortex interaction is similar to that proposed for qubits based on trapped ions. Different types of transmission lines mediating the vortex interaction are proposed.

Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2003
Sprache Englisch
Identifikator DOI: 10.1103/PhysRevB.68.132509
ISSN: 0163-1829, 0556-2805, 1094-1622, 1095-3795, 1098-0121, 1550-235X, 2469-9950, 2469-9969
KITopen ID: 1000074310
Erschienen in Physical review / B
Band 68
Heft 13
Seiten Art. Nr. 132509
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