Browsing Research publications by Author "New, G. H. C."

Now showing items 1-8 of 8

    • Bessel–Gauss beam optical resonator 

      Rogel-Salazar, J.; New, G. H. C.; Chávez-Cerda, S. (2001-04-01)
      In a simple picture, a Bessel beam is views as a transverse standing wave formed in the interference region between incoming and outgoing conical waves. Bases on this interpretation we porpose an optical resonator that ...

    • Characterisation of the dynamical quantum state of a zero temperature Bose–Einstein condensate 

      Rogel-Salazar, J.; Choi, S.; New, G. H. C.; Burnett, K. (2002-07-01)
      We describe the quantum state of a Bose–Einstein condensate at zero temperature. By evaluating theQ-function we show that the ground state of Bose–Einstein condensate under the Hartree approximation is squeezed.We find ...

    • Correlated pair excitations in Bose Einstein condensates in the presence of a Raman coupling 

      Rogel-Salazar, J.; New, G. H. C.; Burnett, K. (2003-04-01)
      We show that it is possible to determine the existence of correlated pairs produced in a down-conversion process within an atomic Bose–Einstein condensate in a systematic manner. This is achieved by measuring the competition ...

    • Methods of quantum field theory for trapped Bose–Einstein condensates 

      Rogel-Salazar, J.; Choi, S.; New, G. H. C.; Burnett, K. (2004)
      In this tutorial we present an introduction to some theoretical methods of quantum field theory applied to the description of a trapped Bose–Einstein condensate. First of all, we give a brief account of the main characteristics ...

    • Propagation invariant beams : Bessel beam resonators 

      Rogel-Salazar, Jesus; Tsangaris, C. L.; Chavez-Cerda, S.; New, G. H. C. (Nova Publishers, 2007)

    • Squeezing and entanglement in quasiparticle excitations of trapped Bose-Einstein condensates 

      Rogel-Salazar, J.; New, G. H. C.; Choi, S.; Burnett, K. (2002)
      We estimate the amount of temperature-dependent squeezing and entanglement in the collective excitations of trapped Bose-Einstein condensates. We also demonstrate an alternative method of temperature measurement for ...

    • Squeezing and temperature measurement in Bose-Einstein condensates 

      Rogel-Salazar, J.; New, G. H. C.; Choi, S.; Burnett, K. (2001)
      In this paper we review recent developments in the theory of quasi-particle coupling in trapped Bose–Einstein condensates. We discuss prospects for observing squeezed quasi-particles in finite-temperature condensates.

    • Unstable Bessel beam resonator 

      Tsangaris, C. L.; New, G. H. C.; Rogel-Salazar, J. (2003-08-01)
      We examine the properties of a Bessel–Gauss resonator design studied previously, and explain the bell-shaped modulation imposed on its lowest-order mode in terms of an equivalent linear cavity. We propose an unstable cavity ...