We study atom scattering from two colliding Bose-Einstein condensates using a position sensitive, time resolved, single atom detector. In analogy to quantum optics, the process can also be thought of as spontaneous, degenerate four-wave mixing of de Broglie waves. We find a clear correlation between atoms with opposite momenta, demonstrating pair production in the scattering process. We also ob...

We have measured the trapping lifetime of magnetically trapped atoms in a cryogenic atom-chip experiment. An ultracold atomic cloud is kept at a fixed distance from a thin gold layer deposited on top of a superconducting trapping wire. The lifetime is studied as a function of the distances to the surface and to the wire. Different regimes are observed, where loss rate is determined either by th...

Journal of Modern Optics Publication details, including instructions for authors and subscription information: http://www.informaworld.com/smpp/title~content=t713191304 Uncertainty relations for the realization of macroscopic quantum superpositions and EPR paradoxes E. G. Cavalcanti a; M. D. Reid a a ARC Centre for Excellence for Atom-Optics, School of Physical Sciences, The University of Queen...

An anisotropic quantum vacuum (AQV) opens novel pathways for controlling light-matter interaction in quantum optics, condensed matter physics, etc. Here, we theoretically demonstrate a strong AQV over macroscopic distances enabled by a judiciously designed array of subwavelength-scale nanoantennas-a metasurface. We harness the phase-control ability and the polarization-dependent response of the...

We propose a scheme to create a macroscopic " Schödinger cat " state formed by two interacting Bose condensates. In analogy with quantum optics, where the control and engineering of quantum states can be maintained to a large extend, we consider the present scheme to be an example of quantum atom optics at work.

Researchers demonstrate lighter, smaller optics and vacuum components for cold-atom experiments that they hope could enable the development of portable quantum technologies.

Atom-photon dressed states are a basic concept of quantum optics. Here, we demonstrate that the non-Hermiticity open cavity can be harnessed to form bound (DBS) and identify two types DBS, vacancy-like DBS Friedrich-Wintgen in microring resonator operating at chiral exceptional point. With analytical conditions, show occurs when an atom couples standing wave mode is node photonic function, thus...

In the near field regime of diffractive atom optics, amplitude corrugations of the de Broglie wave front are important and can lead to interesting effects. One class of near field phenomena is the formation of Fresnel images. We study this effect and possible applications in atom lithography using wave packet simulations. Diffraction of atoms most clearly demonstrates the ultimate wave characte...