Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Patrick M. Ledingham"'
Autor:
Alessandro Seri, Andreas Lenhard, Daniel Rieländer, Mustafa Gündoğan, Patrick M. Ledingham, Margherita Mazzera, Hugues de Riedmatten
Publikováno v:
Physical Review X, Vol 7, Iss 2, p 021028 (2017)
Quantum correlations between long-lived quantum memories and telecom photons that can propagate with low loss in optical fibers are an essential resource for the realization of large-scale quantum information networks. Significant progress has been r
Externí odkaz:
https://doaj.org/article/356dea667ad04fac95064d785552033f
Autor:
T. M. Hird, Dylan J. Saunders, Benjamin Brecht, Joshua Nunn, J. H. D. Munns, S. E. Thomas, Ian A. Walmsley, Patrick M. Ledingham
We demonstrate strong suppression of noise on the output of a Raman quantum memory.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::471d91bd35400d13559664919700696f
https://ora.ox.ac.uk/objects/uuid:21b8081d-a20a-47d9-8b3e-3b17fa988a21
https://ora.ox.ac.uk/objects/uuid:21b8081d-a20a-47d9-8b3e-3b17fa988a21
Autor:
T. M. Hird, Ian A. Walmsley, Dylan J. Saunders, Shaobo Gao, Patrick M. Ledingham, D. Main, E. Oguz
Publikováno v:
Physical Review A
Quantum memories are a crucial technology for enabling large-scale quantum networks through synchronisation of probabilistic operations. Such networks impose strict requirements on quantum memory, such as storage time, retrieval efficiency, bandwidth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9811a87fac7b7f8e1693e61bb7b4c4a4
Publikováno v:
Optics Letters
We demonstrate coherent storage and retrieval of pulsed light using the atomic frequency comb protocol in a room temperature alkali vapor. We utilize velocity-selective optical pumping to prepare multiple velocity classes in the F = 4 hyperfine groun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e92f1ca95c63c4374ee70780c19e8f5b
https://doi.org/10.1364/ol.426753
https://doi.org/10.1364/ol.426753
Publikováno v:
Optics Letters
We experimentally study a broadband implementation of the atomic frequency comb (AFC) rephasing protocol with a cryogenically cooled P r 3 + : Y 2 S i O 5 crystal. To allow for storage of broadband pulses, we explore a novel, to the best of our knowl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b28b86a0c7f1fdf9da1ce86b59a6f27c
https://doi.org/10.1364/ol.423642
https://doi.org/10.1364/ol.423642
Autor:
Krzysztof T. Kaczmarek, O. Lazo-Arjona, Dylan J. Saunders, Benjamin Brecht, Joshua Nunn, S. E. Thomas, Ian A. Walmsley, Shaobo Gao, Patrick M. Ledingham
Publikováno v:
Physical Review Letters
Gao, S, Lazo-Arjona, O, Brecht, B, Kaczmarek, K T, Thomas, S E, Nunn, J, Ledingham, P M, Saunders, D J & Walmsley, I A 2019, ' Optimal Coherent Filtering for Single Noisy Photons ', Physical Review Letters, vol. 123, no. 21, 213604 . https://doi.org/10.1103/PhysRevLett.123.213604
Gao, S, Lazo-Arjona, O, Brecht, B, Kaczmarek, K T, Thomas, S E, Nunn, J, Ledingham, P M, Saunders, D J & Walmsley, I A 2019, ' Optimal Coherent Filtering for Single Noisy Photons ', Physical Review Letters, vol. 123, no. 21, 213604 . https://doi.org/10.1103/PhysRevLett.123.213604
We introduce a filter using a noise-free quantum buffer with large optical bandwidth that can both filter temporal-spectral modes, as well as inter-convert them and change their frequency. We show that such quantum buffers optimally filter out tempor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65c1a517114c51f82c5dffbae07f7461
http://ora.ox.ac.uk/objects/uuid:
http://ora.ox.ac.uk/objects/uuid:
Autor:
J. H. D. Munns, Benjamin Brecht, Patrick M. Ledingham, T. M. Hird, Joshua Nunn, S. E. Thomas, Ian A. Walmsley, Dylan J. Saunders
Publikováno v:
Physical Review A
Quantum memories are essential for large-scale quantum information networks. Along with high efficiency, storage lifetime and optical bandwidth, it is critical that the memory add negligible noise to the recalled signal. A common source of noise in o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ac1bd71403235206ed38586c10a2628
http://ora.ox.ac.uk/objects/uuid:
http://ora.ox.ac.uk/objects/uuid:
Autor:
Patrick M. Ledingham, Dylan J. Saunders, Krzysztof T. Kaczmarek, Benjamin Brecht, S. E. Thomas, O. Lazo-Arjona, Joshua Nunn, I. A. Walmsley, Shaobo Gao
Publikováno v:
Quantum Information and Measurement (QIM) V: Quantum Technologies.
We propose a quantum buffer which optimally filters the temporal-spectral mode of single photon source. We theoretically show that using a Cs vapour, an increase of indistinguishably with minimal loss of brightness can be achieved.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::824c47e9f7e6bc8f3d32a75a78e8ab3e
https://doi.org/10.1364/qim.2019.s4a.3
https://doi.org/10.1364/qim.2019.s4a.3
Autor:
I. A. Walmsley, Joshua Nunn, Raam Uzdin, Krzysztof T. Kaczmarek, C. Weinzetl, Eilon Poem, Jonas Nils Becker, Dylan J. Saunders, J. Klatzow, Patrick M. Ledingham
Publikováno v:
Symposium Latsis 2019 on Diamond Photonics - Physics, Technologies and Applications.
We use an ensemble of nitrogen-vacancy centers in diamond for implementing two types of quantum heat engines. We experimentally demonstrate: (i) a power increase due to coherence, and (ii) the equivalence of the two engine types at small actions. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e88ca990122895292e1a3e04a4bcb137
https://doi.org/10.1364/dp.2019.17
https://doi.org/10.1364/dp.2019.17
Autor:
Nicolas Maring, Kutlu Kutluer, Joachim Cohen, Matteo Cristiani, Margherita Mazzera, Patrick M Ledingham, Hugues de Riedmatten
Publikováno v:
New Journal of Physics, Vol 16, Iss 11, p 113021 (2014)
We report on an experiment that demonstrates the frequency up-conversion of telecommunication wavelength single-photon-level pulses to be resonant with a ${{{\rm Pr} }^{3+}}$ : ${{{\rm Y}}_{2}}{\rm Si}{{{\rm O}}_{5}}$ crystal. We convert the telecom
Externí odkaz:
https://doaj.org/article/4cf3f070fab4471eb2a2d98c051386ca