11 citations · 24 across the 12 of their papers we have counts for
12 papers
Bipartite entanglement harvesting with multiple detectors
Santeri Salomaa, Esko Keski-Vakkuri, Sergi Nadal-Gisbert
We study bipartite entanglement harvesting from the quantum vacuum of a massless scalar field between two subsystems, each composed of a finite number of Unruh-DeWitt detectors. Us…
Partner-mode overlap as a symplectic-invariant measure of correlations in Gaussian quantum field theories
Ivan Agullo, Eduardo Martín-Martínez, Sergi Nadal-Gisbert +1
We introduce a locally symplectic-invariant quantifier of correlations between arbitrary bosonic Gaussian modes, with particular emphasis on quantum field theory. The quantity, den…
Correlation and Entanglement partners in Gaussian systems
Ivan Agullo, Eduardo Martín-Martínez, Sergi Nadal-Gisbert +2
We introduce a framework to identify where the total correlations and entanglement with a chosen degree of freedom reside within the rest of a system, in the context of bosonic man…
The multimode nature of spacetime entanglement in QFT
Ivan Agullo, Béatrice Bonga, Eduardo Martín-Martínez +5
We demonstrate the presence of multimode entanglement in the vacuum state of a free, massless scalar quantum field in four-dimensional flat spacetime between two sets of field mode…
How ubiquitous is entanglement in quantum field theory?
Ivan Agullo, Béatrice Bonga, Patricia Ribes-Metidieri +2
It is well known that entanglement is widespread in quantum field theory, in the following sense: every Reeh-Schlieder state contains entanglement between any two spatially separat…
Low Energy States and CPT invariance at the Big Bang
Sergi Nadal-Gisbert, José Navarro-Salas, Silvia Pla
In this paper, we analyze the quantum vacuum in a radiation-dominated and CPT-invariant universe by further imposing the quantum states to be ultraviolet regular i.e., satisfying t…
Renormalization and a non-adiabatic vacuum choice in a radiation-dominated universe
Pau Beltrán-Palau, Sergi Nadal-Gisbert, José Navarro-Salas +1
Vacuum and particles can be naturally defined in the adiabatic regime of an expanding universe. In general, however, there is no preferred choice of a vacuum state, unless the spac…
Hadamard and boundary conditions for the Big Bang quantum vacuum
Pau Beltrán-Palau, Sergi Nadal-Gisbert, José Navarro-Salas +1
General relativity predicts final-type singularities inside black holes, as well as a cosmological initial-type singularity. Cosmic censorship protects external observers from blac…
Renormalization and decoupling for the Yukawa model in curved spacetime
Sergi Nadal-Gisbert, Antonio Ferreiro, José Navarro-Salas
We consider the renormalization of the one-loop effective action for the Yukawa interaction. We compute the beta functions in the generalized DeWitt-Schwinger subtraction scheme. F…
Dynamical measurements of deviations from Newton's law
J. Baeza-Ballesteros, A. Donini, S. Nadal-Gisbert
In a previous work (arXiv:1609.05654v2), an experimental setup aiming at the measurement of deviations from the Newtonian distance dependence of gravitational interactions…
Renormalization, running couplings and decoupling for the Yukawa model in curved spacetime
Antonio Ferreiro, Sergi Nadal-Gisbert, José Navarro-Salas
The decoupling of heavy fields as required by the Appelquist-Carazzone theorem plays a fundamental role in the construction of any effective field theory. However, it is not a triv…
Note on the pragmatic mode-sum regularization method: translational-splitting in a cosmological background
Pau Beltrán-Palau, Adrián del Río, Sergi Nadal-Gisbert +1
The point-splitting renormalization method offers a prescription to calculate finite expectation values of quadratic operators constructed from quantum fields in a general curved s…