Publications (2022)

Critical quantum metrology with fully-connected models: from Heisenberg to Kibble-Zurek scaling

Authors: Garbe, Louis; Abah, Obinna; Felicetti, Simone; Puebla, Ricardo


Publication date: 2022/06/15

DOI: 10.1088/2058-9565/ac6ca5

Abstract: Phase transitions represent a compelling tool for classical and quantum sensing applications. It has been demonstrated that quantum sensors can in principle saturate the Heisenberg scaling, the ultimate precision bound allowed by quantum mechanics, in the limit of large probe number and long measurement time. Due to the critical slowing down, the protocol duration time is of utmost relevance in critical quantum metrology. However, how the long-time limit is reached remains […]

Internal rotation analysis of the microwave and millimeter wave spectra of fluoral (CF3CHO)

Authors: Bermudez, C.; Motiyenko, R. A.; Cabezas, C.; Ilyushin, V. V.; Margules, L.; Endo, Y.; Guillemin, J. C.


Publication date: 2022/06/05

DOI: 10.1016/j.saa.2022.121071

Abstract: The rotational spectrum (4-40 GHz and 50-330 GHz) has been measured and analyzed for trifluoroacetaldehyde, also known as fluoral (CF3CHO), which is one of the degradation products of the fluorinated contaminants emitted into the atmosphere. The complexity of the spectroscopic analysis of this molecule arises from the strong coupling between the internal rotation motion of CF3 group and the […]

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Delving into guest-free and He-filled sI and sII clathrate hydrates: a first-principles computational study

Authors: Yanes-Rodriguez, Raquel; Cabrera-Ramirez, Adriana; Prosmiti, Rita


Publication date: 2022/06/01

DOI: 10.1039/d2cp00701k

Abstract: The dynamics of the formation of a specific clathrate hydrate as well as its thermodynamic transitions depend on the interactions between the trapped molecules and the host water lattice. The molecular-level understanding of the different underlying processes benefits not only the description of the properties of the system, but also allows the development of multiple technological applications such as gas storage, gas separation, energy transport, etc. In this work we investigate the stability […]

Scalable estimation of pure multi-qubit states

Authors: Pereira, Luciano; Zambrano, Leonardo; Delgado, Aldo


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


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 […]

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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


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; […]

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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


Publication date: 2022/04/27

DOI: 10.3389/fphy.2022.880689

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 […]

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Harnessing nonadiabatic excitations promoted by a quantum critical point: Quantum battery and spin squeezing

Authors: Abah, Obinna; De Chiara, Gabriele; Paternostro, Mauro; Puebla, Ricardo


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 […]

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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.


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, […]

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First-principles modelling of the new generation of subnanometric metal clusters: Recent case studies

Authors: de Lara-Castells, Maria Pilar


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 […]

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Water binding to the atmospheric oxidation product methyl vinyl ketone

Authors: Cabezas, Carlos; Juanes, Marcos; Saragi, Rizalina T.; Lesarri, Alberto; Pena, Isabel


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 […]

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Rotational spectroscopy of the large saturated dinitriles hexanedinitrile and heptanedinitrile

Authors: Cabezas, Carlos; Pena, Isabel; Saragi, Rizalina T.; Juanes, Marcos; Lesarri, Alberto; Cernicharo, Jose


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 […]

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Connecting steady-states of driven-dissipative photonic lattices with spontaneous collective emission phenomena

Authors: Gonzalez-Tudela, Alejandro


Publication date: 2022/04/01

DOI: 10.1088/1367-2630/ac58b7

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 […]

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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


Publication date: 2022/04/01

DOI: 10.3390/galaxies10020047

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 […]

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