Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Wodkiewicz, Krzysztof"'
According to the Gottesmann-Knill theorem the non-Gaussian states are necessary component for a nontrivial quantum computation. We show two efficient and deterministic methods of $\chi^{(3)}$ non-Gaussian state generation for a cavity mode using a si
Externí odkaz:
http://arxiv.org/abs/0810.2618
We present an analysis of noisy atomic channels involving qutrits. We choose a three-level atom with V-configuration to be the qutrit state. Gell-Mann matrices and a generalized Bloch vector (8-dimensional) are used to describe the qutrit density ope
Externí odkaz:
http://arxiv.org/abs/0705.2162
Publikováno v:
Open Systems and Information Dynamics 14, 81 (2007)
We present an effective method of coherent state superposition (cat state) generation using single trapped ion in a Paul trap. The method is experimentally feasible for coherent states with amplitude $\alpha \le 2$ using available technology. It work
Externí odkaz:
http://arxiv.org/abs/quant-ph/0610256
Publikováno v:
Acta Physica Hungarica A 26, 301 (2006)
We propose to use Stokes parameter as an entanglement witness for correlated EPR mixed states of light. Such states can be generated with a beam splitter acting on two mixed squeezed states of light. Stokes witness operators are closely related to th
Externí odkaz:
http://arxiv.org/abs/quant-ph/0608006
Publikováno v:
Phys. Rev. Lett. 98, 063901 (2007)
We present experimental data of the frequency resolved optical gating (FROG) measurements of light pulses revealing interference features corresponding to sub-Planck structures in phase space. For superpositions of pulses a small, sub-Fourier shift i
Externí odkaz:
http://arxiv.org/abs/physics/0607141
Publikováno v:
Phys. Rev. A 78, 013810 (2008)
A Fokker-Planck equation for the Wigner function evolution in a noisy Kerr medium ($\chi^{(3)}$ non-linearity) is presented. We numerically solved this equation taking a coherent state as an initial condition. The dissipation effects are discussed. W
Externí odkaz:
http://arxiv.org/abs/quant-ph/0605166
Publikováno v:
International Journal of Modern Physics B 20, 1504, (2006)
The separability of the continuous-variable EPR state can be tested with Hanbury-Brown and Twiss type interference. The second-order visibility of such interference can provide an experimental test of entanglement. It is shown that time-resolved inte
Externí odkaz:
http://arxiv.org/abs/quant-ph/0508146
Publikováno v:
Laser Physics, vol. 15, No. 10, 1477, (2005)
The connection between the time-dependent physical spectrum of light and the phase space overlap of Wigner functions is investigated for optical pulses. Time and frequency properties of optical pulses with chirp are analyzed using the phase space Wig
Externí odkaz:
http://arxiv.org/abs/physics/0502079
A noisy Gaussian channel is defined as a channel in which an input field mode is subjected to random Gaussian displacements in phase space. We introduce the quantum fidelity of a Gaussian channel for pure and mixed input states, and we derive a unive
Externí odkaz:
http://arxiv.org/abs/quant-ph/0409063
Publikováno v:
Phys. Rev. A 71, 032304, (2005)
Second-order interference and Hanbury-Brown and Twiss type experiments can provide an operational framework for the construction of witness operators that can test classical and nonclassical properties of a Gaussian squeezed state (GSS), and provide
Externí odkaz:
http://arxiv.org/abs/quant-ph/0408047