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- Centre National de la Recherche ScientifiqueFR39 papers
- Max Planck Institute for Radio AstronomyDE21 papers
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- Center for Astrophysics Harvard & SmithsonianUS19 papers
- Hiroshima UniversityJP19 papers
- Max Planck Institute for Extraterrestrial PhysicsDE14 papers
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- National Defense UniversityTW14 papers
- The University of TokyoJP13 papers
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- European Southern ObservatoryCL12 papers
- Ludwig-Maximilians-Universität MünchenDE12 papers
6 papers · 2 filters
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…
Universal tunneling time for all fields
G. Nimtz, A. A. Stahlhofen
Tunneling is an important physical process. The observation that particles surmount a high mountain in spite of the fact that they don't have the necessary energy cannot be explain…
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…
Approximate quantum error correction, random codes, and quantum channel capacity
Rochus Klesse
We work out a theory of approximate quantum error correction that allows us to derive a general lower bound for the entanglement fidelity of a quantum code. The lower bound is give…