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- University of GdańskPL161 papers
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15 papers · 1 filter
Degree of entanglement as a physically ill-posed problem: The case of entanglement with vacuum
Marcin Pawlowski, Marek Czachor
We analyze an example of a photon in superposition of different modes, and ask what is the degree of their entanglement with vacuum. The problem turns out to be ill-posed since we…
Direct measurement of non-linear properties of bipartite quantum states
Fabio Antonio Bovino, Giuseppe Castagnoli, Artur Ekert +3
Non-linear properties of quantum states, such as entropy or entanglement, quantify important physical resources and are frequently used in quantum information science. They are usu…
Ca_25Co_22O_56(OH)_28: a layered misfit compound
T. Klimczuk, H. W. Zandbergen, N. M. van der Pers +4
The high pressure synthesis, structure and magnetic properties of Ca_25Co_22O_56(OH)_28 are reported. The compound has a misfit structure, consisting of double, square calcium oxid…
Combining Tight-binding and Molecular dynamics Methods to Model the Behaviour of Metals in the Plastic Regime
Maciej Bobrowski, Jacek Dziedzic, Jaroslaw Rybicki
Ultra-precision machining of metals, the breaking of nanowires under tensile stress and fracture of nanoscale materials are examples of technologically important processes which ar…
Cavity-QED tests of representations of canonical commutation relations employed in field quantization
Marek Czachor, Marcin Wilczewski
Various aspects of dissipative and nondissipative decoherence of Rabi oscillations are discussed in the context of field quantization in alternative representations of CCR. Theory…
Low dimensional bound entanglement with one-way distillable cryptographic key
Karol Horodecki, Lukasz Pankowski, Michal Horodecki +1
We provide a class of bound entangled states that have positive distillable secure key rate. The smallest state of this kind is , which shows that peculiar security co…