121 citations · 238 across the 13 of their papers we have counts for
13 papers
The Zero-Age Massive Stellar Population of W49A from VLA Observations
M. Juárez-Gama, R. Galván-Madrid, G. Suárez +14
We use all-configuration VLA data at 3.3 cm with a physical resolution of ~2000 AU to infer the embedded zero-age massive stellar population of the W49A protocluster, as traced by…
Influence of spatial curvature in cosmological particle production
Jose A. R. Cembranos, Luis J. Garay, Álvaro Parra-López
We analyze cosmological particle production driven by spacetime expansion in the early universe for homogeneous and isotropic cosmologies with positive, negative, and zero spatial…
Estimation of gravitational production uncertainties
Jose A. R. Cembranos, Luis J. Garay, Álvaro Parra-López +1
Cosmological production of scalar, non-minimally coupled dark matter depends on the specifics of the inflationary model under consideration. We analyze both Starobinsky inflation a…
Experimental particle production in time-dependent spacetimes: a one-dimensional scattering problem
Marius Sparn, Elinor Kath, Nikolas Liebster +7
We experimentally study cosmological particle production in a two-dimensional Bose-Einstein condensate, whose density excitations map to an analog cosmology. The expansion of space…
Toward the Observation of Entangled Pairs in BEC analogue Expanding Universes
Ivan Agullo, Adrià Delhom, Álvaro Parra-López
Pair creation is a fundamental prediction of quantum field theory in curved spacetimes. While classical aspects of this phenomenon have been observed, the experimental confirmation…
Cosmological particle production in a quantum field simulator as a quantum mechanical scattering problem
Christian F. Schmidt, Álvaro Parra-López, Mireia Tolosa-Simeón +7
The production of quantum field excitations or particles in cosmological spacetimes is a hallmark prediction of curved quantum field theory. The generation of cosmological perturba…
Vector dark matter production during inflation and reheating
Jose A. R. Cembranos, Luis J. Garay, Álvaro Parra-López +1
Gravitational particle production of spectator fields due to the expansion universe during the inflationary and reheating phases of the early universe is of particular interest in…
Operational realization of quantum vacuum ambiguities
Álvaro Álvarez-Domínguez, José A. R. Cembranos, Luis J. Garay +3
We provide a reinterpretation of the quantum vacuum ambiguities that one encounters when studying particle creation phenomena due to an external and time-dependent agent. We propos…
Late vacuum choice and slow roll approximation in gravitational particle production during reheating
Jose A. R. Cembranos, Luis J. Garay, Álvaro Parra-López +1
In the transition between inflation and reheating, the curvature scalar typically undergoes oscillations which have significant impact on the density of gravitationally produced pa…
Curved and expanding spacetime geometries in Bose-Einstein condensates
Mireia Tolosa-Simeón, Álvaro Parra-López, Natalia Sánchez-Kuntz +9
Phonons have the characteristic linear dispersion relation of massless relativistic particles. They arise as low energy excitations of Bose-Einstein condensates and, in nonhomogene…
Scalar quantum fields in cosmologies with 2+1 spacetime dimensions
Natalia Sánchez-Kuntz, Álvaro Parra-López, Mireia Tolosa-Simeón +2
Motivated by the possibility to use Bose-Einstein condensates as quantum simulators for spacetime curvature, we study a massless relativistic scalar quantum field in spatially curv…
Quantum field simulator for dynamics in curved spacetime
Celia Viermann, Marius Sparn, Nikolas Liebster +9
The observed large-scale structure in our Universe is seen as a result of quantum fluctuations amplified by spacetime evolution. This, and related problems in cosmology, asks for a…
Synchronization in two-level quantum systems
Álvaro Parra-López, Joakim Bergli
Recently, it was shown that dissipative quantum systems with three or more levels are able to synchronize to an external signal, but it was stated that it is not possible for two-l…