Zobrazeno 1 - 10
of 333
pro vyhledávání: '"Bachor, H. A."'
Autor:
Hage, B., Janoušek, J., Armstrong, S., Symul, T., Bernu, J., Chrzanowski, H. M., Lam, P. K., Bachor, H. A.
We report on the preparation of entangled two mode squeezed states of yet unseen quality. Based on a measurement of the covariance matrix we found a violation of the Reid and Drummond EPR-criterion at a value of only 0.36\pm0.03 compared to the thres
Externí odkaz:
http://arxiv.org/abs/1103.4199
A setup is proposed to enhance tracking of very small particles, by using optical tweezers embedded within a Sagnac interferometer. The achievable signal-to-noise ratio is shown to be enhanced over that for a standard optical tweezers setup. The enha
Externí odkaz:
http://arxiv.org/abs/1006.0777
Autor:
Döring, D., McDonald, G., Debs, J. E., Figl, C., Altin, P. A., Bachor, H. -A., Robins, N. P., Close, J. D.
Publikováno v:
Phys. Rev. A 81, 043633 (2010)
Every measurement of the population in an uncorrelated ensemble of two-level systems is limited by what is known as the quantum projection noise limit. Here, we present quantum projection noise limited performance of a Ramsey type interferometer usin
Externí odkaz:
http://arxiv.org/abs/1002.3624
Squeezing experiments which are capable of creating a minimum uncertainty state during the nonlinear process, for example optical parametric amplification, are commonly used to produce light far below the quantum noise limit. This report presents a m
Externí odkaz:
http://arxiv.org/abs/0901.3309
Optical entanglement is a key requirement for many quantum communication protocols. Conventionally entanglement is formed between two distinct beams, with the quantum correlations being measured at separate locations. We show entanglement between the
Externí odkaz:
http://arxiv.org/abs/0812.4686
Autor:
Reid, M. D., Drummond, P. D., Cavalcanti, E. G., Bowen, W. P., Lam, P. K., Bachor, H. A., Andersen, U. L., Leuchs, G.
Publikováno v:
Rev.Mod. Phys. 81, 1727 (2009)
This Colloquium examines the field of the EPR Gedankenexperiment, from the original paper of Einstein, Podolsky and Rosen, through to modern theoretical proposals of how to realize both the continuous-variable and discrete versions of the EPR paradox
Externí odkaz:
http://arxiv.org/abs/0806.0270
Autor:
Hétet, G., Buchler, B. C., Glöckl, O., Hsu, M. T. L., Akulshin, A. M., Bachor, H. -A., Lam, P. K.
We demonstrate experimentally the delay of squeezed light and entanglement using Electromagnetically Induced Transparency (EIT) in a rubidium vapour cell. We perform quadrature amplitude measurements of the probe field and find no appreciable excess
Externí odkaz:
http://arxiv.org/abs/0803.2097
Publikováno v:
Optics Express, Vol. 17, Issue 21, pp. 18693-18702 (2009)
We obtain criteria for entanglement and the EPR paradox for spin-entangled particles and analyse the effects of decoherence caused by absorption and state purity errors. For a two qubit photonic state, entanglement can occur for all transmission effi
Externí odkaz:
http://arxiv.org/abs/0711.3798
Autor:
Hétet, G., Glöckl, O., Pilypas, K. A., Harb, C. C., Buchler, B. C., Bachor, H. -A., Lam, P. K.
We report on the generation of more than 5 dB of vacuum squeezed light at the Rubidium D1 line (795 nm) using periodically poled KTiOPO$_{4}$ (PPKTP) in an optical parametric oscillator. We demonstrate squeezing at low sideband frequencies, making th
Externí odkaz:
http://arxiv.org/abs/quant-ph/0611204
Autor:
Hetet, G., Peng, A., Johnsson, M. T., Hsu, M. T. L., Gloeckl, O., Lam, P. K., Bachor, H . A., Hope, J. J.
An inconsistency was found in the equations used to calculate the variance of the quadrature fluctuations of a field propagating through a medium demonstrating electromagnetically induced transparency (EIT). The decoherence term used in our original
Externí odkaz:
http://arxiv.org/abs/quant-ph/0605238