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quant-ph2007★ 32 cited
Quantum states with strong positive partial transpose
Dariusz Chruscinski, Jacek Jurkowski, Andrzej Kossakowski
We construct a large class of bipartite M x N quantum states which defines a proper subset of states with positive partial transposes (PPT). Any state from this class is PPT but th…
quant-ph2005
Quantum damped oscillator I: dissipation and resonances
Dariusz Chruscinski, Jacek Jurkowski
Quantization of a damped harmonic oscillator leads to so called Bateman's dual system. The corresponding Bateman's Hamiltonian, being a self-adjoint operator, displays the discrete…