Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Brion, Etienne"'
Autor:
Vylegzhanin, Alexey, Brown, Dylan J., Raj, Aswathy, Kornovan, Danil F., Everett, Jesse L., Brion, Etienne, Robert, Jacques, Chormaic, Síle Nic
Cold Rydberg atoms are a promising platform for quantum technologies and combining them with optical waveguides has the potential to create robust quantum information devices. Here, we experimentally observe the excitation of cold rubidium atoms to a
Externí odkaz:
http://arxiv.org/abs/2305.05186
Publikováno v:
Phys. Rev. A 100, 013820 (2019)
We study the propagation and storage of a quantum field using ultra-narrow Coherent Population Oscillations (CPO) in a $\Lambda-$type atomic medium. The predictions for classical fields are checked experimentally in a metastable vapor at room tempera
Externí odkaz:
http://arxiv.org/abs/1902.01120
Autor:
Neveu, Pascal, Banerjee, Chitram, Lugani, Jasleen, Bretenaker, Fabien, Brion, Etienne, Goldfarb, Fabienne
Publikováno v:
New J. Phys. 20, 083043 (2018)
We isolate a novel four-wave mixing process, enabled by Coherent Population Trapping (CPT), leading to efficient phase sensitive amplification. This process is permitted by the exploitation of two transitions starting from the same twofold degenerate
Externí odkaz:
http://arxiv.org/abs/1803.05435
We question the microcanonical hypothesis, often made to account for the thermalization of complex closed quantum systems, on the specific example of a chain of two-level atoms optically driven by a resonant laser beam and strongly interacting via Ry
Externí odkaz:
http://arxiv.org/abs/1601.01554
Autor:
Boddeda, Rajiv, Usmani, Imam, Bimbard, Erwan, Grankin, Andrey, Ourjoumtsev, Alexei, Brion, Etienne, Grangier, Philippe
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 49 084005 (2016)
We experimentally characterize the optical nonlinear response of a cold atomic medium placed inside an optical cavity, and excited to Rydberg states. The excitation to S and D Rydberg levels is carried out via a two-photon transition in an EIT (elect
Externí odkaz:
http://arxiv.org/abs/1512.08480
Publikováno v:
Phys. Rev. A 93, 023815 (2016)
A method is presented to transfer a system of two-level atoms from a spin coherent state to a maximally spin squeezed Dicke state, relevant for quantum metrology and quantum information processing. The initial state is the ground state of an initial
Externí odkaz:
http://arxiv.org/abs/1510.07261
Autor:
Das, Sumanta, Grankin, Andrey, Iakoupov, Ivan, Brion, Etienne, Borregaard, Johannes, Boddeda, Rajiv, Usmani, Imam, Ourjoumtsev, Alexei, Grangier, Philippe, Sørensen, Anders S.
Publikováno v:
Phys. Rev. A 93, 040303 (2016)
We propose a novel scheme for high fidelity photonic controlled phase gates using Rydberg blockade in an ensemble of atoms in an optical cavity. The gate operation is obtained by first storing a photonic pulse in the ensemble and then scattering a se
Externí odkaz:
http://arxiv.org/abs/1506.04300
Autor:
Brion, Etienne
Le contrôle quantique constitue un enjeu majeur de la Physique contemporaine. Après un bref tour d'horizon du domaine, nous présentons une méthode, appelée contrôle non holonôme, qui permet d'imposer à système quantique quelconque une évolu
Externí odkaz:
http://tel.archives-ouvertes.fr/tel-00007910
http://tel.archives-ouvertes.fr/docs/00/04/81/11/PDF/tel-00009428.pdf
http://tel.archives-ouvertes.fr/docs/00/04/81/11/PDF/tel-00009428.pdf
We propose to implement the Jaynes-Cummings model by coupling a few-micrometer large atomic ensemble to a quantized cavity mode and classical laser fields. A two-photon transition resonantly couples the single-atom ground state |g> to a Rydberg state
Externí odkaz:
http://arxiv.org/abs/1006.3633
Publikováno v:
Phys. Rev. Lett. 100, 110506 (2008)
We propose to use a collective excitation blockade mechanism to identify errors that occur due to disturbances of single atoms in ensemble quantum registers where qubits are stored in the collective population of different internal atomic states. A s
Externí odkaz:
http://arxiv.org/abs/0710.1717