Zobrazeno 1 - 10
of 103
pro vyhledávání: '"Uskov D"'
Autor:
Lougovski, P., Uskov, D. B.
Publikováno v:
Phys. Rev. A 92, 022303 (2015)
Entanglement can effectively increase communication channel capacity as evidenced by dense coding that predicts a capacity gain of 1 bit when compared to entanglement-free protocols. However, dense coding relies on Bell states and when implemented us
Externí odkaz:
http://arxiv.org/abs/1502.00554
Publikováno v:
Phys. Rev. A 91, 062318 (2015)
We analyze the generation of linear optical cluster states (LOCS) via addition of one and two qubits. Existing approaches employ the stochastic linear optical two-qubit CZ gate with success rate of 1/9 per fusion operation. The question of optimality
Externí odkaz:
http://arxiv.org/abs/1407.6055
We report on theoretical research in photonic cluster-state computing. Finding optimal schemes of generating non-classical photonic states is of critical importance for this field as physically implementable photon-photon entangling operations are cu
Externí odkaz:
http://arxiv.org/abs/1306.4062
We question whether the measurement based quantum computing algorithm is in fact Grover's algorithm or simply a similar oracular search method. The two algorithms share several qualitative features especially in the case of the trivial 4 element sear
Externí odkaz:
http://arxiv.org/abs/1211.3407
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 45, 185502 (2012)
Here we propose an experiment in Linear Optical Quantum Computing (LOQC) using the framework first developed by Knill, Laflamme, and Milburn. This experiment will test the ideas of the authors' previous work on imperfect LOQC gates using number-resol
Externí odkaz:
http://arxiv.org/abs/1201.5798
Publikováno v:
Phys. Rev. A 84, 032341 (2011)
We use the numerical optimization techniques of Uskov et al. [PRA 81, 012303 (2010)] to investigate the behavior of the success rates for KLM style [Nature 409, 46 (2001)] two- and three-qubit entangling gates. The methods are first demonstrated at p
Externí odkaz:
http://arxiv.org/abs/1105.4211
We investigate the effect of exciton coupling on the optical absorption spectrum of polymer molecules under conditions of strong inhomogeneous broadening. We demonstrate that the dependence of the maximum in the rescaled absorption spectrum on the nu
Externí odkaz:
http://arxiv.org/abs/0806.4943
Autor:
Uskov, D. B., Burin, A. L.
Microscopic mechanisms of positive charge transfer in DNA remain unclear. A quantum state of electron hole in DNA is determined by the competition of a pi-stacking interaction $b$ smearing a charge between different base pairs and interaction $\lambd
Externí odkaz:
http://arxiv.org/abs/0801.3502
Autor:
Uskov, D., Rau, A. R. P.
A two-sphere ("Bloch" or "Poincare") is familiar for describing the dynamics of a spin-1/2 particle or light polarization. Analogous objects are derived for unitary groups larger than SU(2) through an iterative procedure that constructs evolution ope
Externí odkaz:
http://arxiv.org/abs/0801.2091
Publikováno v:
Phys. Rev. A 76, 063808 (2007)
We introduce schemes for linear-optical quantum state generation. A quantum state generator is a device that prepares a desired quantum state using product inputs from photon sources, linear-optical networks, and postselection using photon counters.
Externí odkaz:
http://arxiv.org/abs/quant-ph/0612154