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The massless conformally coupled scalar field is characterized by the so-called ''new improved stress-energy tensor'', which is capable of classically violating the null energy condition. When coupled to Einstein gravity we find a three-parameter class of exact solutions. These exact solutions include the Schwarzschild geometry, assorted naked… (More)

- Carlos Barceló, Stefano Liberati, Matt Visser
- Living reviews in relativity
- 2005

Analogue gravity is a research programme which investigates analogues of general relativistic gravitational fields within other physical systems, typically but not exclusively condensed matter systems, with the aim of gaining new insights into their corresponding problems. Analogue models of (and for) gravity have a long and distinguished history dating… (More)

We analyse prospects for the use of Bose–Einstein condensates as condensed-matter systems suitable for generating a generic 'effective metric', and for mimicking kinematic aspects of general relativity. We extend the analysis due to Garay et al Taking a long-term view, we ask what the ultimate limits of such a system might be. To this end, we consider a… (More)

We demonstrate that the emergence of a curved spacetime 'effective Lorentzian geometry' is a common and generic result of linearizing a classical scalar field theory around some non-trivial background configuration. This investigation is motivated by considering the large number of 'analogue models' of general relativity that have recently been developed… (More)

- CARLOS BARCELÓ, D. V. Ahluwalia
- 2002

The tension, if not outright inconsistency, between quantum physics and general rela-tivity is one of the great problems facing physics at the turn of the millennium. Most often, the problems arising in merging Einstein gravity and quantum physics are viewed as Planck scale issues (10 19 GeV, 10 −34 m, 10 −45 s), and so safely beyond the reach of… (More)

Bose-Einstein condensates ͑BEC's͒ have recently been the subject of considerable study as possible analog models of general relativity. In particular it was shown that the propagation of phase perturbations in a BEC can, under certain conditions, closely mimic the dynamics of scalar quantum fields in curved space times. In two previous papers ͓Int. D ͑to be… (More)

Acoustic analogues of black holes (dumb holes) are generated when a supersonic fluid flow entrains sound waves and forms a trapped region from which sound cannot escape. The surface of no return, the acoustic horizon, is qualitatively very similar to the event horizon of a general relativity black hole. In particular Hawking radiation (a thermal bath of… (More)

In a previous paper [Barceló C et al 2001 Class. Quantum Grav. 18 3595– 610 (Preprint gr-qc/0104001)] we have shown that the occurrence of curved spacetime 'effective Lorentzian geometries' is a generic result of linearizing an arbitrary classical field theory around some nontrivial background configuration. This observation explains the ubiquitous nature… (More)

- Jerry Spiegel, Carlos Barceló, Eric B Loucks, Mariano Bonet, Alfredo Aldama, Annalee Yassi
- Journal of public health
- 2004

BACKGROUND
From extensive participatory research in inner city communities in Central Havana, Cuba, we found housing to be the largest perceived source of health risk. The objective of this study, therefore, was to ascertain the feasibility of conducting a multi-method longitudinal evaluation of the impact of housing improvements on health.
METHODS… (More)

- CARLOS BARCELÓ
- 2003

It is by now well known that various condensed matter systems may be used to mimic many of the kinematic aspects of general relativity, and in particular of curved-spacetime quantum field theory. In this essay we will take a look at what would be needed to mimic a cosmological spacetime — to be precise a spatially flat FRW cosmology — in one of these… (More)