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Browsing by Author "Jurkowski, Jacek"

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Browsing by Author "Jurkowski, Jacek"

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  • Jurkowski, Jacek; Chruściński, Dariusz (2010-02-18)
    We show that each entanglement witness detecting given bipartite entangled state provides an estimation of its concurrence. We illustrate our result with several well known examples of entanglement witnesses and compare ...
  • Chruściński, Dariusz; Jurkowski, Jacek (2007-12-07)
    We analyze the new equation of motion for the damped oscillator. It differs from the standard one by a damping term which is nonlocal in time and hence it gives rise to a system with memory. Both classical and quantum ...
  • Chruściński, Dariusz; Jurkowski, Jacek (2005-06-01)
    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 family of complex eigenvalues. We show ...
  • Chruściński, Dariusz; Jurkowski, Jacek; Kossakowski, Andrzej (2007-10-10)
    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 the positivity of its partial transposition ...