Analogue gravity is a research programme which investigates analogues of general
relativistic gravitational fields within other physical systems, typically but not exclusively …

In most cosmological models, rapid expansion of space marks the first moments of the
Universe and leads to the amplification of quantum fluctuations. The description of …

We review phase-space techniques based on the Wigner representation that provide an
approximate description of dilute ultra-cold Bose gases. In this approach the quantum field …

Physics is living an era of unprecedented cross-fertilization among the different areas of
science. In this perspective review, we discuss the manifold impact that state-of-the-art cold …

We study the dynamics of a supersonically expanding, ring-shaped Bose-Einstein
condensate both experimentally and theoretically. The expansion redshifts long-wavelength …

Efforts to develop alternative transport fuels and vehicles are found in countries varying
tremendously in their level of economic development. In this paper, we compare the …

We have modulated the density of a trapped Bose-Einstein condensate by changing the trap
stiffness, thereby modulating the speed of sound. We observe the creation of correlated …

We report numerical evidence of Hawking emission of Bogoliubov phonons from a sonic
horizon in a flowing one-dimensional atomic Bose–Einstein condensate. The presence of …

There has been a significant surge of interest in Hořava's model for 3+ 1 dimensional
quantum gravity, this model being based on anisotropic scaling at az= 3 Lifshitz point …

The rapid expansion of the early universe resulted in the spontaneous production of
cosmological particles from vacuum fluctuations, some of which are observable today in the …