Publications (2022)
Universal Deterministic Quantum Operations in Microwave Quantum Links
Authors: Penas, Guillermo F.; Puebla, Ricardo; Ramos, Tomas; Rabl, Peter; Jose Garcia-Ripoll, Juan
Journal: PHYSICAL REVIEW APPLIED
Publication date: 2022/05/24
DOI: 10.1103/PhysRevApplied.17.054038
Abstract: We propose a realistic setup, inspired by already existing experiments, within which we develop a general formalism for the implementation of distributed quantum gates. Mediated by a quantum link that establishes a bidirectional quantum channel between distant nodes, our proposal works both for inter- and intranode communication and handles scenarios ranging from the few to the many modes limit of the quantum link We are able to design […]
Scalable estimation of pure multi-qubit states
Authors: Pereira, Luciano; Zambrano, Leonardo; Delgado, Aldo
Journal: NPJ QUANTUM INFORMATION
Publication date: 2022/05/13
DOI: 10.1038/s41534-022-00565-9
Abstract: We introduce an inductive n-qubit pure-state estimation method based on projective measurements on mn + 1 separable bases or m entangled bases plus the computational basis, with m >= 2. The method exhibits a favorable scaling in the number of qubits compared to other estimation schemes. The use of separable bases makes our estimation method particularly well suited for applications in noisy intermediate-scale quantum computers, where entangling gates are much less accurate than local […]
Benchmarking quantum annealing dynamics: The spin-vector Langevin model
Authors: Subires, David; Gomez-Ruiz, Fernando J.; Ruiz-Garcia, Antonia; Alonso, Daniel; del Campo, Adolfo
Journal: PHYSICAL REVIEW RESEARCH
Publication date: 2022/05/09
DOI: 10.1103/PhysRevResearch.4.023104
Abstract: The classical spin-vector Monte Carlo (SVMC) model is a reference benchmark for the performance of a quantum annealer. Yet, as a Monte Carlo method, SVMC is unsuited for an accurate description of the annealing dynamics in real-time. We introduce the spin-vector Langevin (SVL) model as an alternative benchmark in which the time evolution is described by Langevin dynamics. The SVL model is shown to provide a more stringent […]
Quenches to the critical point of the three-state Potts model: Matrix product state simulations and conformal field theory
Authors: Robertson, Niall F.; Surace, Jacopo; Tagliacozzo, Luca
Journal: PHYSICAL REVIEW B
Publication date: 2022/05/04
DOI: 10.1103/PhysRevB.105.195103
Abstract: Conformal field theories (CFTs) have been used extensively to understand the physics of critical lattice models at equilibrium. However, the applicability of CFT calculations to the behavior of the lattice systems in the out-of-equilibrium setting is not entirely understood. In this work, we compare the CFT results of the evolution of the entanglement spectrum after a quantum quench with numerical calculations of the entanglement spectrum of the three-state Potts model using matrix product […]
PDRs4All: A JWST Early Release Science Program on Radiative Feedback from Massive Stars
Authors: Berne, Olivier; Habart, Emilie; Peeters, Els; Abergel, Alain; Bergin, Edwin A.; Bernard-Salas, Jeronimo; Bron, Emeric; Cami, Jan; Dartois, Emmanuel; Fuente, Asuncion; Goicoechea, Javier R.; Gordon, Karl D.; Okada, Yoko; Onaka, Takashi; Robberto, Massimo; Rollig, Markus; Tielens, Alexander G. G. M.; Vicente, Silvia; Wolfire, Mark G.; Alarcon, Felipe; Boersma, C.; Canin, Amelie; Chown, Ryan; Dicken, Daniel; Languignon, David; Le Gal, Romane; Pound, Marc W.; Trahin, Boris; Simmer, Thomas; Sidhu, Ameek; Van de Putte, Dries; Cuadrado, Sara; Guilloteau, Claire; Maragkoudakis, Alexandros; Schefter, Bethany R.; Schirmer, Thiebaut; Cazaux, Stephanie; Aleman, Isabel; Allamandola, Louis; Auchettl, Rebecca; Baratta, Giuseppe Antonio; Bejaoui, Salma; […]
Atom scattering as a probe of the surface electron-phonon interaction at conducting surfaces
Authors: Manson, J. R.; Benedek, G.; Miret-Artes, Salvador
Journal: SURFACE SCIENCE REPORTS
Publication date: 2022/05/01
DOI: 10.1016/j.surfrep.2022.100552
Abstract: An atomic projectile colliding with a surface at kinetic energies in the thermal or hyperthermal range interacts with and is reflected by the electronic density well in front of the first layer of target atoms, and it is generally accepted that the repulsive interaction potential is proportional to the density of electrons extending outside the surface. This review develops a complete treatment of the elastic and inelastic scattering of atoms from a conducting […]
Dynamics of Ring-Cleavage Reactions in Temozolomide Induced by Low-Energy Electron Attachment
Authors: Arthur-Baidoo, Eugene; Izadi, Farhad; Guerra, Carlos; Garcia, Gustavo; Oncak, Milan; Denifl, Stephan
Journal: FRONTIERS IN PHYSICS
Publication date: 2022/04/27
Abstract: We have used a crossed electron molecular beam setup to investigate the behavior of the anticancer drug temozolomide (TMZ) upon the attachment of low-energy electrons (0-14 eV) in the gas phase. Upon a single electron attachment, eight anionic fragments are observed, the most intense being an anion with mass of 109 u at a resonance energy of 0 eV. Quantum chemical calculations suggest that this ion is generated […]
Breaking Orion’s Veil with fossil outflows
Authors: Kavak, U.; Goicoechea, J. R.; Pabst, C. H. M.; Bally, J.; van der Tak, F. F. S.; Tielens, A. G. G. M.
Journal: ASTRONOMY & ASTROPHYSICS
Publication date: 2022/04/22
DOI: 10.1051/0004-6361/202141367
Abstract: Context. The role of feedback in the self-regulation of star formation is a fundamental question in astrophysics. The Orion Nebula is the nearest site of ongoing and recent massive star formation. It is a unique laboratory for the study of stellar feedback. Recent SOFIA [C II] 158 mu m observations have revealed an expanding bubble, the Veil shell, […]
Harnessing nonadiabatic excitations promoted by a quantum critical point: Quantum battery and spin squeezing
Authors: Abah, Obinna; De Chiara, Gabriele; Paternostro, Mauro; Puebla, Ricardo
Journal: PHYSICAL REVIEW RESEARCH
Publication date: 2022/04/22
DOI: 10.1103/PhysRevResearch.4.L022017
Abstract: Crossing a quantum critical point in finite time challenges the adiabatic condition due to the closing of the energy gap, which ultimately results in the formation of excitations. Such nonadiabatic excitations are typically deemed detrimental in many scenarios, and consequently several strategies have been put forward to circumvent their formation. Here, however, we show how these nonadiabatic excitations-originated from the failure to meet the adiabatic condition due to the presence of […]
First-principles modelling of the new generation of subnanometric metal clusters: Recent case studies
Authors: de Lara-Castells, Maria Pilar
Journal: JOURNAL OF COLLOID AND INTERFACE SCIENCE
Publication date: 2022/04/06
DOI: 10.1016/j.jcis.2021.12.186
Abstract: The very recent development of highly selective techniques making possible the synthesis and experimental characterization of subnanometric (subnanometer-sized) metal clusters (even single atoms) is pushing our understanding far beyond the present knowledge in materials science, driving these clusters as a new generation of quantum materials at the lower bounds of nanotechnology. When the size of the metal cluster is reduced to a small number of atoms, the d-band of the metal splits into […]
Water binding to the atmospheric oxidation product methyl vinyl ketone
Authors: Cabezas, Carlos; Juanes, Marcos; Saragi, Rizalina T.; Lesarri, Alberto; Pena, Isabel
Journal: SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Publication date: 2022/04/05
DOI: 10.1016/j.saa.2021.120846
Abstract: Methyl vinyl ketone is one of the major oxidation products of isoprene, and therefore, an important precursor of secondary organic aerosol. Understanding its interactions with water is relevant to gain insight into aerosol formation and improve the predictive power of atmospheric chemistry models. The molecular complex formed between methyl vinyl ketone and water has been generated in a supersonic jet and characterized using high-resolution microwave […]
Rotational spectroscopy of the large saturated dinitriles hexanedinitrile and heptanedinitrile
Authors: Cabezas, Carlos; Pena, Isabel; Saragi, Rizalina T.; Juanes, Marcos; Lesarri, Alberto; Cernicharo, Jose
Journal: SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Publication date: 2022/04/05
DOI: 10.1016/j.saa.2021.120844
Abstract: Dinitriles with a saturated hydrocarbon skeleton and a -C N group at each end can have large electric dipole moments. Their formation can be related to highly reactive radicals such as CH2CN, C2N, or CN. Thus, these saturated dinitriles are potential candidates to be observed in the interstellar medium. In this work, two members of this family, hexanedinitrile and heptanedinitrile, have been investigated […]
Connecting steady-states of driven-dissipative photonic lattices with spontaneous collective emission phenomena
Authors: Gonzalez-Tudela, Alejandro
Journal: NEW JOURNAL OF PHYSICS
Publication date: 2022/04/01
Abstract: Recent experimental advances enable the fabrication of photonic lattices in which the light propagates with engineered energy dispersions. When interfaced with quantum emitters, such systems yield strong collective spontaneous emission phenomena, such as perfect sub-radiance, in which the decay into the bath is completely suppressed, forming bound-states-in-the-continuum (BIC). Since such photonic lattices are generally lossy, an alternative way of probing them consists in coherently driving them to an steady-state from which photoluminescence can be extracted. Here, we […]
M 1-92 Revisited: New Findings and Open Questions: New NOEMA Observations of Minkowski’s Footprint
Authors: Alcolea, Javier; Agundez, Marcelino; Bujarrabal, Valentin; Castro-Carrizo, Arancha; Desmurs, Jean-Francois; Martinez-Fernandez, John-Eduard; Sanchez Contreras, Carmen; Santander-Garcia, Miguel
Journal: GALAXIES
Publication date: 2022/04/01
Abstract: PN M 1-92, also known as Minkowski’s Footprint, is a textbook example of a massive pre-planetary nebula. It presents all the characteristics of this type of source: non-spherical symmetry (bipolar cylindrical symmetry in this case), high-velocity gas emission, large amounts of linear momentum and kinetic energy (momentum excess), and a self-similar growing structure. We have revisited this object by performing new NOEMA observations (with half […]
Out-of-time-order correlator in the quantum Rabi model
Authors: Kirkova, Aleksandrina, V; Porras, Diego; Ivanov, Peter A.
Journal: PHYSICAL REVIEW A
Publication date: 2022/03/25
DOI: 10.1103/PhysRevA.105.032444
Abstract: We investigate signatures of chaos and equilibration in the quantum Rabi model, which exhibits a quantum phase transition when the ratio of the atomic level-splitting to bosonic frequency grows to infinity. We show that the out-of-time-order correlator derived from the Loschmidt echo signal quickly saturates in the normal phase and undergoes exponential growth in the superradiant phase, which is associated with the onset of quantum chaos. Furthermore, we show that the effective […]