Search Results - "Sparkes, B M"

Increasing the Brightness of Cold Ion Beams by Suppressing Disorder-Induced Heating with Rydberg Blockade by Murphy, D, Scholten, R E, Sparkes, B M

“…A model for the equilibrium coupling of an ion system with varying initial hard-sphere Rydberg blockade correlations is used to quantify the suppression of…”
Get full text

Gradient echo memory in an ultra-high optical depth cold atomic ensemble by Sparkes, B M, Bernu, J, Hosseini, M, Geng, J, Glorieux, Q, Altin, P A, Lam, P K, Robins, N P, Buchler, B C

“…Quantum memories are an integral component of quantum repeaters-devices that will allow the extension of quantum key distribution to communication ranges…”
Get full text

Suppression of Emittance Growth Using a Shaped Cold Atom Electron and Ion Source by Thompson, D J, Murphy, D, Speirs, R W, van Bijnen, R M W, McCulloch, A J, Scholten, R E, Sparkes, B M

“…We demonstrate precise control of charged particle bunch shape with a cold atom electron and ion source to create bunches with linear and, therefore,…”
Get full text

Electromagnetically induced transparency and four-wave mixing in a cold atomic ensemble with large optical depth by Geng, J, Campbell, G T, Bernu, J, Higginbottom, D B, 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 (EIT) in an ensemble of cold atoms with an optical depth exceeding 500…”
Get full text

Precision Spectral Manipulation: A Demonstration Using a Coherent Optical Memory by Sparkes, B. M., Hosseini, M., Cairns, C., Higginbottom, D., Campbell, G. T., Lam, P. K., Buchler, B. C.

“…The ability to coherently spectrally manipulate quantum information has the potential to improve qubit rates across quantum channels and find applications in…”
Get full text

Unconditional room-temperature quantum memory by Hosseini, M., Campbell, G., Sparkes, B. M., Lam, P. K., Buchler, B. C.

“…Just as classical information systems require buffers and memory, the same is true for quantum information systems. The potential that optical quantum…”
Get full text

High efficiency coherent optical memory with warm rubidium vapour by Buchler, B.C, Hosseini, M, Sparkes, B.M, Campbell, G, Lam, P.K

“…By harnessing aspects of quantum mechanics, communication and information processing could be radically transformed. Promising forms of quantum information…”
Get full text

Detailed observation of space–charge dynamics using ultracold ion bunches by Murphy, D., Speirs, R. W., Sheludko, D. V., Putkunz, C. T., McCulloch, A. J., Sparkes, B. M., Scholten, R. E.

“…Control of Coulomb expansion in charged particle beams is of critical importance for applications including electron and ion microscopy, injectors for particle…”
Get full text

Electromagnetically induced transparency and fourwave mixing in a cold atomic ensemble with large optical depth by Geng, J, Campbell, G T, Bernu, J, Higginbottom, D B, 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 (EIT) in an ensemble of cold atoms with an optical depth exceeding 500…”
Get full text

Time- and frequency-domain polariton interference by Campbell, G, Hosseini, M, Sparkes, B M, Lam, P K, Buchler, B C

“…We present experimental observations of interference between an atomic spin coherence and an optical field in a Λ-type gradient echo memory. The interference…”
Get full text

Dual-rail optical gradient echo memory by Higginbottom, D B, Geng, J, Campbell, G T, Hosseini, M, Cao, M T, Sparkes, B M, Bernu, J, Robins, N P, Lam, P K, Buchler, B C

“…We introduce a scheme for the parallel storage of frequency separated signals in an optical memory and demonstrate that this dual-rail storage is a suitable…”
Get full text

Photon-number discrimination without a photon counter and its application to reconstructing non-Gaussian states by Chrzanowski, H. M., Bernu, J., Sparkes, B. M., Hage, B., Lund, A. P., Ralph, T. C., Lam, P. K., Symul, T.

“…The nonlinearity of a conditional photon-counting measurement can be used to ''de-Gaussify'' a Gaussian state of light. Here we present and experimentally…”
Get full text

Spatial-mode storage in a gradient-echo memory by Higginbottom, D. B., Sparkes, B. M., Rancic, M., Pinel, O., Hosseini, M., Lam, P. K., Buchler, B. C.

Get full text

Wavefront Curvature in Optical Atomic Beam Clocks by 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…”
Get full text

Stimulated Raman Adiabatic Passage for Improved Performance of a Cold Atom Electron and Ion Source by Sparkes, B. M, Murphy, D, Taylor, R. J, Speirs, R. W, McCulloch, A. J, Scholten, R. E

“…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…”
Get full text

Unconditional Room Temperature Quantum Memory by Hosseini, M, Campbell, G, Sparkes, B. M, Lam, P. K, Buchler, B. C

“…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…”
Get full text

Time- and frequency-domain polariton interference by Campbell, G. T, Hosseini, M, Sparkes, B. M, Lam, P. K, Buchler, B. C

“…2012 New J. Phys. 14 033022 We present experimental observations of interference between an atomic spin coherence and an optical field in a {\Lambda}-type…”
Get full text

Electromagnetically induced transparency and four-wave mixing in a cold atomic ensemble with large optical depth by 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…”
Get full text

Storage and Manipulation of Light Using a Raman Gradient Echo Process by Hosseini, M, Sparkes, B. M, Campbell, G. T, Lam, P. K, Buchler, B. C

“…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…”
Get full text

Gradient echo memory in an ultra-high optical depth cold atomic ensemble by Sparkes, B. M, Bernu, J, Hosseini, M, Geng, J, Glorieux, Q, Altin, P. A, Lam, P. K, Robins, N. P, Buchler, B. C

“…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…”
Get full text