Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Klesse, Rochus"'
Autor:
Kleinbölting, Stephan, Klesse, Rochus
Publikováno v:
Phys. Rev. E 91, 052101, 2015
We consider thermalization of a microscopic quantum system by interaction with a thermal bath. Our interest is the minimal size the bath can have while still being able to thermalize the system. Within a specific thermalization scheme we show that a
Externí odkaz:
http://arxiv.org/abs/1411.2489
We investigate the generation of quantum mechanical entanglement of two remote oscillators that are locally coupled to a common bosonic bath. Starting with a Lagrangian formulation of a suitable model, we derive two coupled Quantum Langevin Equations
Externí odkaz:
http://arxiv.org/abs/1111.5531
Within a generalized Caldeira-Leggett model we analyze the conditions under which a bosonic heat bath can entangle two microscopic quantum systems at a distance $r$. We find that the attainable entanglement is extremely distance-sensitive. Significan
Externí odkaz:
http://arxiv.org/abs/0812.3782
Autor:
Klesse, Rochus
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 this sense, the proof is close to Shannon's original treatment of infor
Externí odkaz:
http://arxiv.org/abs/0712.2558
Autor:
Borghoff, Stefan, Klesse, Rochus
Publikováno v:
Phys. Rev. A 77, 012306 (2007)
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 for a quantum register that is realized in a spin chain in contact with
Externí odkaz:
http://arxiv.org/abs/0708.3775
Autor:
Klesse, Rochus
Publikováno v:
Phys. Rev. A 75, 062315 (2007)
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 given in terms of Kraus operators of the quantum noise. This result is the
Externí odkaz:
http://arxiv.org/abs/quant-ph/0701102
Autor:
Klesse, Rochus, Frank, Sandra
Publikováno v:
Phys. Rev. Lett. 95, 230503 (2005)
We consider quantum error correction of quantum-noise that is created by a local interaction of qubits with a common bosonic bath. The possible exchange of bath bosons between qubits gives rise to spatial and temporal correlations in the noise. We fi
Externí odkaz:
http://arxiv.org/abs/quant-ph/0505153
We study the way back-scattering electron--electron interaction generates Coulomb drag between quantum wires with different densities. At low temperature $T$ the system can undergo a commensurate-- incommensurate transition as the potential differenc
Externí odkaz:
http://arxiv.org/abs/cond-mat/0408118
Autor:
Klesse, Rochus, Merz, Florian
We address the origin of the residual resistance observed in microwave irradiated two-dimensional electron gases in a weak magnetic field. We study charge modulations arising from negative photo-conductivity and show that dissipative currents are exp
Externí odkaz:
http://arxiv.org/abs/cond-mat/0305492
Autor:
Klesse, Rochus
We analyze two scattering mechanisms that might cause intrinsic electronic resistivity in multi-wall carbon nanotubes: scattering by dopant impurities, and scattering by inter-tube electron-electron interaction. We find that for typically doped multi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0206264