Zobrazeno 1 - 10
of 273
pro vyhledávání: '"Sparkes, B. A."'
Autor:
Ahern, E., Allison, J. W., Billington, C., Hébert, N. Bourbeau, Hilton, A. P., Klantsataya, E., Locke, C., Luiten, A. N., Nelligan, M., Offer, R. F., Perrella, C., Scholten, S. K., White, B., Sparkes, B. M., Beard, R., Elgin, J. D., Martin, K. W.
Atomic clocks have been at the leading edge of accuracy and precision since their inception in the 1950s. However, typically the most capable of these clocks have been confined to laboratories despite the fact that there are compelling reasons to app
Externí odkaz:
http://arxiv.org/abs/2406.03716
Autor:
Strathearn, A., Offer, R. F., Hilton, A. P., Klantsataya, E., Luiten, A. N., Anderson, R. P., Sparkes, B. M., Stace, T. M.
Atomic clocks provide a reproducible basis for our understanding of time and frequency. Recent demonstrations of compact optical clocks, employing thermal atomic beams, have achieved short-term fractional frequency instabilities in the $10^{-16}$, co
Externí odkaz:
http://arxiv.org/abs/2212.00308
Publikováno v:
Phys. Rev. A 94, 023404 (2016)
We implement high-efficiency coherent excitation to a Rydberg state using stimulated Raman adiabatic passage in a cold atom electron and ion source. We achieve an efficiency of 60% averaged over the laser excitation volume with a peak efficiency of 8
Externí odkaz:
http://arxiv.org/abs/1602.07791
Publikováno v:
Nature Physics, Vol. 7, 794-798, 2011
Just as classical information systems require buffers and memory, the same is true for quantum information systems. The potential that optical quantum information processing holds for revolutionising computation and communication is therefore driving
Externí odkaz:
http://arxiv.org/abs/1412.8235
Autor:
Geng, J., Campbell, G. T., Bernu, J., Higginbottom, D., Sparkes, B. M., Assad, S. M., Zhang, W. P., Robins, N. P., Lam, P. K., Buchler, B. C.
We report on the delay of optical pulses using electromagnetically induced transparency in an ensemble of cold atoms with an optical depth exceeding 500. To identify the regimes in which four-wave mixing impacts on EIT behaviour, we conduct the exper
Externí odkaz:
http://arxiv.org/abs/1408.2316
Autor:
Sparkes, B. M., Bernu, J., Hosseini, M., Geng, J., Glorieux, Q., Altin, P. A., Lam, P. K., Robins, N. P., Buchler, B. C.
Publikováno v:
B M Sparkes et al 2013 New J. Phys. 15 085027
Quantum memories are an integral component of quantum repeaters - devices that will allow the extension of quantum key distribution to communication ranges beyond that permissible by passive transmission. A quantum memory for this application needs t
Externí odkaz:
http://arxiv.org/abs/1211.7171
Autor:
Giner, L., Veissier, L., Sparkes, B., Sheremet, A. S., Nicolas, A., Mishina, O. S., Scherman, M., Burks, S., Shomroni, I., Kupriyanov, D. V., Lam, P. K., Giacobino, E., Laurat, J.
Publikováno v:
Physical Review A 87, 1 (2013) 013823
Two phenomena can affect the transmission of a weak signal field through an absorbing medium in the presence of a strong additional field: electromagnetically induced transparency (EIT) and Autler-Townes splitting (ATS). Being able to discriminate be
Externí odkaz:
http://arxiv.org/abs/1206.5921
The Gradient Echo Memory (GEM) scheme has potential to be a suitable protocol for storage and retrieval of optical quantum information. In this paper, we review the properties of the $\Lambda$-GEM method that stores information in the ground states o
Externí odkaz:
http://arxiv.org/abs/1203.6489
Autor:
Sparkes, B. M., Cairns, C., Hosseini, M., Higginbottom, D., Campbell, G., Lam, P. K., Buchler, B. C.
Publikováno v:
Phys. Rev. X 2, 021011 (2012)
The ability to coherently spectrally manipulate quantum information has the potential to improve qubit rates across quantum channels and find applications in optical quantum computing. In this paper we present experiments that use a multi-element sol
Externí odkaz:
http://arxiv.org/abs/1202.6096
Using a gradient echo memory, we experimentally demonstrate cross phase modulation (XPM) between two optical pulses; one stored and one freely propagating through the memory medium. We explain how this idea can be extended to enable substantial nonli
Externí odkaz:
http://arxiv.org/abs/1112.2010