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Reviewing phase operator from the aspect of quantum field theory(Fundamental Problems and Applications of Quantum Field Theory-Topological Aspects of Quantum Field Theory-)

Takayoshi Ootsuka

素粒子論研究Apr 20, 20070 citations

Zeros of the dispersion relation of the elementary excitation and the correlation length of strongly correlated quantum systems(Fundamental Problems and Applications of Quantum Field Theory-Topological Aspects of Quantum Field Theory-)

Yuichi Nakamura, Naomichi Hatano

素粒子論研究Apr 20, 20070 citations

Topological order and fractionalization(Fundamental Problems and Applications of Quantum Field Theory-Topological Aspects of Quantum Field Theory-)

Masaki Oshikawa

素粒子論研究Apr 20, 20070 citations

COHERENT STATES SOME APPLICATIONS IN QUANTUM FIELD THEORY AND PARTICLE PHYSICS

Bo-Sture Skagerstam

May 1, 19949 citations

Study of Quantum Decoherence in a Finite System -- Three Schroedinger Cats and Crossing of Classical Orbits

Takuji Ishikawa

Nuclei are rather classical systems in a sense. In the old days, their phenomena were roughly explained in classical rules such as the liquid drop model. This fact may be understood that when we see an finite quantum many body system like nucleus, though which is a group of quantum mechanical particles, its any collective degree of freedom has any classicality. Getting a classicality does not depend on spatial scales of objects. It is made by a phenomenon called Quantum Decoherence. We have studied about Quantum Decoherence in a finite system as nucleus. In this paper, at the harmonic three body problem (3 Schroedinger cats), it is shown that one degree of freedom as a sub-system would get classicality because of the other two degrees of freedom. Therefore we can assume that a nuclear collective degree of freedom would get classicality when it couples with any other internal degrees of freedom. In this paper, we also note that there is some relationship between the Quantum Decoherence and Crossing of classical orbits in 3 Schroedinger cats model.Nuclei are rather classical systems in a sense. In the old days, their phenomena were roughly explained in classical rules such as the liquid drop model. This fact may be understood that when we see an finite quantum many body system like nucleus, though which is a group of quantum mechanical particles, its any collective degree of freedom has any classicality. Getting a classicality does not depend on spatial scales of objects. It is made by a phenomenon called Quantum Decoherence. We have studied about Quantum Decoherence in a finite system as nucleus. In this paper, at the harmonic three body problem (3 Schroedinger cats), it is shown that one degree of freedom as a sub-system would get classicality because of the other two degrees of freedom. Therefore we can assume that a nuclear collective degree of freedom would get classicality when it couples with any other internal degrees of freedom. In this paper, we also note that there is some relationship between the Quantum Decoherence and Crossing of classical orbits in 3 Schroedinger cats model.

arXiv:0903.3374Mar 19, 20090 citations

Theoretical study of decoherence mechanisms and entanglement dynamics with specific application to materials like superconductors, magnets, etc., and quantum computation

Philip C. E. Stamp, Jeroen Wiemer

Nov 1, 20000 citations

Study of Quantum Decoherence in a finite system : Three Schrodinger cats, Nuclear collective motion, Crossing of Classical orbits and Decoherence(Fundamental Problems and Applications of Quantum Field Theory-Topological Aspects of Quantum Field Theory-)

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Study of Quantum Decoherence in a finite system : Three Schrodinger cats, Nuclear collective motion, Crossing of Classical orbits and Decoherence(Fundamental Problems and Applications of Quantum Field Theory-Topological Aspects of Quantum Field Theory-)

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