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- Centre National de la Recherche ScientifiqueFR19 papers
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5 papers · 1 filter
A random-coding based proof for the quantum coding theorem
Rochus Klesse
We present a proof for the quantum channel coding theorem which relies on the fact that a randomly chosen code space typically is highly suitable for quantum error correction. In t…
Casimir forces between arbitrary compact objects: Scalar and electromagnetic field
T. Emig, R. L. Jaffe
We develop an exact method for computing the Casimir energy between arbitrary compact objects, both with boundary conditions for a scalar field and dielectrics or perfect conductor…
Decoherence of encoded quantum registers
Stefan Borghoff, Rochus Klesse
In order to eliminate disturbing effects of decoherence, encoding of quantum information in decoherence-free subspaces has been suggested. We analyze the benefits of this concept f…
Coulomb analogy for nonhermitian degeneracies near quantum phase transitions
P. Cejnar, S. Heinze, M. Macek
Degeneracies near the real axis in a complex-extended parameter space of a hermitian Hamiltonian are studied. We present a method to measure distributions of such degeneracies on t…
Quantum Physics and Classical Physics - in the Light of Quantum Logic
Peter Mittelstaedt
In contrast to the Copenhagen interpretation we consider quantum mechanics as universally valid and query whether classical physics is really intuitive and plausible. - We discuss…