Inductive coupling of two superconducting loops with three Josephson junctions

✍ Scribed by Yoshihiro Shimazu

• Book ID: 104428523
• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 73 KB
• Volume: 18
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/s1386-9477(02)00940-2

✦ Synopsis

A superconducting loop with three Josephson junctions can behave as a macroscopic quantum two-level system, which could be used as a ux qubit. Coupling of qubits is necessary to realize a quantum computer. We studied the classical states of two such loops which are inductively coupled. When the magnetic ux in each loop is near half a ux quantum, there are two classical states in which the magnetic moments of the loops are parallel and anti-parallel respectively, while the anti-parallel state is energetically favorable. The magnetic ux due to the coupled loops is calculated as a function of the frustration.