Aplicación

@article{nokey,

title = {Quantum Bayesian Inference with Renormalization for Gravitational Waves},

author = {Escrig, G. and Campos, R. and Qi, H. and Martin-Delgado, M.A. },

url = {https://iopscience.iop.org/article/10.3847/2041-8213/ada6ae},

doi = {10.3847/2041-8213/ada6ae},

year  = {2025},

date = {2025-01-28},

journal = {The Astrophysical Journal Letters},

volume = {979},

issue = {2},

pages = {L36},

abstract = {Advancements in gravitational-wave (GW) interferometers, particularly the next generation, are poised to enable the detections of orders of magnitude more GWs from compact binary coalescences. While the surge in detections will profoundly advance GW astronomy and multimessenger astrophysics, it also poses significant computational challenges in parameter estimation. In this work, we introduce a hybrid quantum algorithm qBIRD, which performs quantum Bayesian inference with renormalization and downsampling to infer GW parameters. We validate the algorithm using both simulated and observed GWs from binary black hole mergers on quantum simulators, demonstrating that its accuracy is comparable to classical Markov Chain Monte Carlo methods. Currently, our analyses focus on a subset of parameters, including chirp mass and mass ratio, due to the limitations from classical hardware in simulating quantum algorithms. However, qBIRD can accommodate a broader parameter space when the constraints are eliminated with a small-scale quantum computer of sufficient logical qubits.},

keywords = {UCM-4.3},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Hawking-Page transition on a spin chain},

author = {Pérez-García D. and Santilli, L. and Tierz, M 

},

url = {https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.6.033007},

doi = {doi.org/10.1103/PhysRevResearch.6.033007},

year  = {2024},

date = {2024-07-01},

urldate = {2024-07-01},

journal = {Physical Review Research},

volume = {6},

issue = {3},

pages = {033007},

abstract = {The accessibility of the Hawking-Page transition in AdS5 through a one-dimensional (1D) Heisenberg spin chain is demonstrated. We use the random matrix formulation of the Loschmidt echo for a set of spin chains, and randomize the ferromagnetic spin interaction. It is shown that the thermal Loschmidt echo, when averaged, detects the predicted increase in entropy across the Hawking-Page transition. This suggests that a 1D spin chain exhibits characteristics of black hole physics in 4+1 dimensions. We show that this approach is equally applicable to free fermion systems with a general dispersion relation.},

keywords = {UCM-4.3},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Dynamical quantum phase transitions from random matrix theory},

author = {Pérez-García, D. and Santilli, L. and Tierz, M.},

url = {https://quantum-journal.org/papers/q-2024-02-29-1271/},

doi = {doi.org/10.22331/q-2024-02-29-1271},

year  = {2024},

date = {2024-02-29},

journal = {Quantum},

volume = {8},

pages = {1271},

abstract = {We uncover a novel dynamical quantum phase transition, using random matrix theory and its associated notion of planar limit. We study it for the isotropic XY Heisenberg spin chain. For this, we probe its real-time dynamics through the Loschmidt echo. This leads to the study of a random matrix ensemble with a complex weight, whose analysis requires novel technical considerations, that we develop. We obtain three main results: 1) There is a third order phase transition at a rescaled critical time, that we determine. 2) The third order phase transition persists away from the thermodynamic limit. 3) For times below the critical value, the difference between the thermodynamic limit and a finite chain decreases exponentially with the system size. All these results depend in a rich manner on the parity of the number of flipped spins of the quantum state conforming the fidelity.},

keywords = {UCM-4.3},

pubstate = {published},

tppubtype = {article}

}