Quantum theory for the Josephson phase dynamics in a d-dot

Tomio Koyama; M. Machida; M. Kato; T. Ishida

doi:10.1016/j.physc.2005.01.077

Quantum theory for the Josephson phase dynamics in a d-dot

Tomio Koyama, M. Machida, M. Kato, T. Ishida

Institute for Materials Research (IMR)

Research output: Contribution to journal › Conference article › peer-review

11 Citations (Scopus)

Abstract

We formulate a canonical quantum theory for the square-shape closed 0-π junction system in the absence of an external magnetic field. When the quantum tunneling takes place between the two degenerate classical ground states having different current patterns, the system forms a quantum two-level system. The Hamiltonian which describes the quantum two-level system is derived from the generalized sine-Gordon equation.

Original language	English
Pages (from-to)	1561-1565
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	426-431
Issue number	II
DOIs	https://doi.org/10.1016/j.physc.2005.01.077
Publication status	Published - 2005 Oct 7
Event	Proceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity - Duration: 2004 Nov 23 → 2004 Nov 25

Keywords

0-π junction
Two-level system
d-dot

ASJC Scopus subject areas

Condensed Matter Physics

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10.1016/j.physc.2005.01.077

Cite this

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abstract = "We formulate a canonical quantum theory for the square-shape closed 0-π junction system in the absence of an external magnetic field. When the quantum tunneling takes place between the two degenerate classical ground states having different current patterns, the system forms a quantum two-level system. The Hamiltonian which describes the quantum two-level system is derived from the generalized sine-Gordon equation.",

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T1 - Quantum theory for the Josephson phase dynamics in a d-dot

AU - Koyama, Tomio

AU - Machida, M.

AU - Kato, M.

AU - Ishida, T.

PY - 2005/10/7

Y1 - 2005/10/7

N2 - We formulate a canonical quantum theory for the square-shape closed 0-π junction system in the absence of an external magnetic field. When the quantum tunneling takes place between the two degenerate classical ground states having different current patterns, the system forms a quantum two-level system. The Hamiltonian which describes the quantum two-level system is derived from the generalized sine-Gordon equation.

AB - We formulate a canonical quantum theory for the square-shape closed 0-π junction system in the absence of an external magnetic field. When the quantum tunneling takes place between the two degenerate classical ground states having different current patterns, the system forms a quantum two-level system. The Hamiltonian which describes the quantum two-level system is derived from the generalized sine-Gordon equation.

KW - 0-π junction

KW - Two-level system

KW - d-dot

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DO - 10.1016/j.physc.2005.01.077

M3 - Conference article

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SN - 0921-4534

VL - 426-431

SP - 1561

EP - 1565

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - II

T2 - Proceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity

Y2 - 23 November 2004 through 25 November 2004

ER -

Quantum theory for the Josephson phase dynamics in a d-dot

Abstract

Keywords

ASJC Scopus subject areas

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