Physics – Quantum Physics
Scientific paper
2006-07-15
Physics Letters B 640 (2006) 52 - 56
Physics
Quantum Physics
13 pages
Scientific paper
10.1016/j.physletb.2006.07.028
For a specific exactly solvable 2 by 2 matrix model with a PT-symmetric
Hamiltonian possessing a real spectrum, we construct all the eligible physical
metrics and show that none of them admits a factorization CP in terms of an
involutive charge operator C. Alternative ways of restricting the physical
metric to a unique form are briefly discussed.
Geyer Hendrik B.
Znojil Miloslav
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