Three-Hilbert-space formulation of quantum mechanics.
Znojil, Miloslav (2009)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
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Znojil, Miloslav (2009)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
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Nesterov, Alexander I. (2009)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
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Bagchi, Bijan, Fring, Andreas (2009)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
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Carl M. Bender (2003)
Annales de l’institut Fourier
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In this paper I discuss quantum systems whose Hamiltonians are non-Hermitian but whose energy levels are all real and positive. Such theories are required to be symmetric under , but not symmetric under and separately. Recently, quantum mechanical systems having such properties have been investigated in detail. In this paper I extend the results to quantum field theories. Among the systems that I discuss are and theories. These theories all have unexpected and remarkable properties....
Znojil, Miloslav
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Znojil, Miloslav (2008)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
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Cherbal, Omar, Drir, Mahrez, Maamache, Mustapha, Trifonov, Dimitar A. (2010)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
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Kovalchuk, Vasyl, Slawianowski, Jan Jerzy (2008)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
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Robert, Didier (2008)
Serdica Mathematical Journal
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2000 Mathematics Subject Classification: 81Q60, 35Q40. A standard supersymmetric quantum system is defined by a Hamiltonian [^H] = ½([^Q]*[^Q] +[^Q][^Q]*), where the super-charge [^Q] satisfies [^Q]2 = 0, [^Q] commutes with [^H]. So we have [^H] ≥ 0 and the quantum spectrum of [^H] is non negative. On the other hand Pais-Ulhenbeck proposed in 1950 a model in quantum-field theory where the d'Alembert operator [¯] = [(∂2)/( ∂t2)] − Δx is replaced by fourth order operator [¯]([¯]...
Znojil, Miloslav
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