Publications
77 results found
Rogel-Salazar J, Cash JR, Stremsdoerfer B, et al., 2005, Simulation of organic light emitting devices with the method-of-lines
We characterise the behaviour of bilayer organic light emitting devices using numerical simulations based on the Method-of-Lines. The algorithm offers rapid convergence and avoids the problem of ill-conditioned systems of differential equations. © 2005 Optical Society of America.
Rogel-Salazar J, Shuttle CG, Mello J, et al., 2005, Efficient simulations of organic light emitting devices, New York, Pacific rim conference on lasers and electro-optics, 11 - 15 July 2005, Tokyo, JAPAN, Publisher: Ieee, Pages: 673-673
Rogel-Salazar J, Choi S, New GHC, et al., 2004, Methods of quantum field theory for trapped Bose-Einstein condensates, JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS, Vol: 6, Pages: R33-R59, ISSN: 1464-4266
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- Citations: 9
Rogel-Salazar J, Hinds EA, 2004, Classification of quantum degenerate regimes in one-dimensional bose gases, Pages: 429-430, ISSN: 1094-5695
We analyse extensively some experimental parameters to achieve the different regimes of quantum degeneracy for a one-dimensional Bose gas, paying particular attention to the tunability of the radial frequency and present some interesting examples. © 2004 Optical Society of America.
Tsangaris CL, New GHC, Rogel-Salazar J, 2003, Unstable Bessel beam resonator
We propose an unstable laser resonator design consisting of a conical and a convex mirror. The intensity profile of its lowest order mode resembles a Bessel function with little inherent modulation imposed by the geometry. © 2003 IEEE.
Tsangaris CL, New GHC, Rogel-Salazar J, 2003, Unstable Bessel beam resonator, OPTICS COMMUNICATIONS, Vol: 223, Pages: 233-238, ISSN: 0030-4018
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- Citations: 25
Rogel-Salazar J, New GHC, Burnett K, 2003, Correlated pair excitations in Bose-Einstein condensates in the presence of a Raman coupling, J. Opt. B: Quantum Semiclass. Opt., Vol: 5
Rogel-Salazar J, New GHC, Burnett K, 2003, Correlated pair excitations in Bose-Einstein condensates in the presence of a Raman coupling, 7th International Workshop on Atom Optics and Interferometry, Publisher: IOP PUBLISHING LTD, Pages: S90-S95, ISSN: 1464-4266
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- Citations: 2
Rogel-Salazar J, New GHC, Burnett K, 2003, Probing correlated pair excitations in Bose-Einstein condensates with a Raman coupling
We show that the existence of correlated pairs produced by a down-conversion process in a Bose-Einstein condensate can be probed systematically by exploiting the competition between Beliaev damping and a Raman coupling.
Rogel-Salazar J, Choi S, New GHC, et al., 2002, Characterisation of the dynamical quantum state of a zero temperature Bose-Einstein condensate, PHYSICS LETTERS A, Vol: 299, Pages: 476-482, ISSN: 0375-9601
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- Citations: 12
Rogel-Salazar J, New GHC, Choi S, et al., 2002, Squeezing and entanglement in quasiparticle excitations of trapped Bose-Einstein condensates, PHYSICAL REVIEW A, Vol: 65, ISSN: 1050-2947
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- Citations: 22
Rogel-Salazar J, Choi S, Burnett K, 2002, Quantum state portrayal of a Bose condensed gas, Pages: 87-88
With the realization of Bose-Einstein condensation in dilute gases, it was possible to study the dynamics of quantum fields at finite temperatures. Thus, the Gross-Pitaevskii equation (GPE) have proved to be a very useful tool for describing Bose-Einstein condensates (BECs) and have shown very good agreement with experimental results at low temperatures. This paper applies the mean-field approximation to describe the quantum state of a Bose-Einstein condensate, using a phase-space representation to visualize such a state.
Rogel-Salazar J, New GHC, Choi S, et al., 2001, Squeezing and temperature measurement in Bose-Einstein condensates, Publisher: IoP
Rogel-Salazar J, New GHC, Chávez-Cerda S, 2001, Bessel-Gauss beam optical resonator, OPTICS COMMUNICATIONS, Vol: 190, Pages: 117-122, ISSN: 0030-4018
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- Citations: 57
Rogel-Salazar J, New GHC, Choi S, et al., 2001, Squeezed excitations in trapped Bose-Einstein condensates, Pages: 250-251
Summary form only given. The microscopic theory of interacting Bose gases developed more than 50 years ago by Bogoliubov plays an essential role in the description of these systems. However, processes such as Beliaev damping are not predicted by the mean field approximation. Recently, the observation of Beliaev damping for a scissors mode of a BEC of rubidium atoms has been reported allowing the consideration of theory beyond the mean field. The Beliaev damping process is, in a sense, analogous to parametric down conversion of light, where one photon incident on a nonlinear crystal with second order susceptibility is split into two new photons of lower frequencies. Parametric down conversion has long been considered as an important source of squeezed states. In this paper we point out that similar processes can be observed in BEC.
Rogel-Salazar J, New GHC, Muys P, et al., 2001, Bessel-Gauss laser resonators, Conference on Laser Resonators IV, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, Pages: 56-63, ISSN: 0277-786X
Rogel-Salazar J, New GHC, Chavez-Cerda S, 2000, Non-diffractive laser resonators
A Bessel-beam laser based on an optical resonator was considered and a computational model of cavity incorporating an axicon was also investigated. Parameters such as the use of plane output mirror and varied cavity length propagation were used. The simulation results confirmed the modes of the cavity as Bessel beams were simple transverse standing waves. Bessel beams representative of Hankel functions, were fundamental travelling-wave solutions of Helmholtz reduced wave equations.
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