Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Mundarain, D."'
Autor:
Isasi, E., Mundarain, D.
In this work we review the entire classification of 2x2 distillable states for protocols with a finite numbers of copies. We show a distillation protocol that allows to distill Bell states with non zero probability at any time for an initial singlet
Externí odkaz:
http://arxiv.org/abs/0908.2142
In this work we study the dynamics of the maximum extractable entanglement for a system composed of two qubits interacting either with two independent thermal baths, a common thermal bath or a common squeezed bath. The states with maximum entanglemen
Externí odkaz:
http://arxiv.org/abs/0809.1912
Autor:
Mundarain, D., Stephany, J.
In this report we consider the three dimensional subset of the space of states of two qubits that may be written in the so called standard form. For those states we show that different measures of entanglement, specifically concurrence, negativity an
Externí odkaz:
http://arxiv.org/abs/0712.1015
In this work we show that is possible to obtain Total Quantum Zeno Effect in an unstable systems for times larger than the correlation time of the bath. The effect is observed for some particular systems in which one can chose appropriate observables
Externí odkaz:
http://arxiv.org/abs/0704.1605
Autor:
Mundarain, D., Orszag, M.
In this work we find explicitly the decoherence free subspace (DFS) for a two two-level system in a common squeezed vacuum bath. We also find an orthogonal basis for the DFS composed of a symmetrical and an antisymmetrical (under particle permutation
Externí odkaz:
http://arxiv.org/abs/quant-ph/0611090
In this work we show that by frequent measurements of adequately chosen observables, a complete suppression of the decay in an exponentially decaying two level system interacting with a squeezed bath is obtained. The observables for which the effect
Externí odkaz:
http://arxiv.org/abs/quant-ph/0610179
Autor:
Mundarain, D. F., Stephany, J.
We discuss the appearance of Zeno (QZE) or anti-Zeno (QAE) effect in an exponentially decaying system. We consider the quantum dynamics of a continuously monitored two level system interacting with a squeezed bath. We find that the behavior of the sy
Externí odkaz:
http://arxiv.org/abs/quant-ph/0510214
Autor:
Mundarain, D. F., Stephany, J.
We discuss a phase space description of the photon number distribution of non classical states which is based on Husimi's $Q(\alpha)$ function and does not rely in the WKB approximation. We illustrate this approach using the examples of displaced num
Externí odkaz:
http://arxiv.org/abs/quant-ph/0311151
Autor:
Mundarain, D. F., Stephany, J.
Publikováno v:
Phys Lett A 316, (2003), 357-362
Squeezed number states for a single mode Hamiltonian are investigated from two complementary points of view. Firstly the more relevant features of their photon distribution are discussed using the WKB wave functions. In particular the oscillations of
Externí odkaz:
http://arxiv.org/abs/quant-ph/0305151
Publikováno v:
J.Opt.B Quant.Semiclass.Opt. 4 (2002) 352-357
We compute the photon number distribution, the Q distribution function and the wave functions in the momentum and position representation for a single mode squeezed number state using generating functions which allow to obtain any matrix element in t
Externí odkaz:
http://arxiv.org/abs/quant-ph/0108024