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

2022-09-19T17:23:42+02:00Tags: , |

Authors: Abah, O.; De Chiara, G.; Paternostro, M.; Puebla, R. 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 [...]

Benchmarking quantum annealing dynamics: The spin-vector Langevin model

2022-09-19T15:57:16+02:00Tags: , |

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 [...]

On some unexplored decoherence aspects in the Caldeira-Leggett formalism: arrival time distributions, identical particles and diffraction in time

2022-09-19T15:57:15+02:00Tags: , |

Authors: Mousavi, S., V; Miret-Artes, S. Journal: EUROPEAN PHYSICAL JOURNAL PLUS Publication date: 2022/01/19 DOI: 10.1140/epjp/s13360-022-02367-6 Abstract: Some unexplored decoherence aspects within the Caldeira-Leggett master equation are analyzed and discussed. The decoherence process is controlled by the two environment parameters, the relaxation rate or friction and the temperature, leading to a gradual transition from the [...]

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

2022-09-19T15:57:14+02:00Tags: , |

Authors: Gonzalez-Tudela, Alejandro Journal: NEW JOURNAL OF PHYSICS 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 [...]

Ultrastrong Capacitive Coupling of Flux Qubits

2022-09-19T15:57:14+02:00Tags: , |

Authors: Hita-Perez, Maria; Jauma, Gabriel; Pino, Manuel; Garcia-Ripoll, Juan Jose Journal: PHYSICAL REVIEW APPLIED Publication date: 2022/01/24 DOI: 10.1103/PhysRevApplied.17.014028 Abstract: A flux qubit can interact strongly when it is capacitively coupled to other circuit elements. This interaction can be separated into two parts, one acting on the qubit subspaces and one in which excited states [...]

Absolute total electron detachment and relative ionisation cross sections for O-2 (-) collisions with O-2 in the energy range (10-1500 eV)

2022-09-19T15:57:14+02:00Tags: , |

Authors: Guerra, Carlos; Lozano, Ana, I; Mendes, Monica F.; Kumar, Sarvesh; Oller, Juan C.; Limao-Vieira, Paulo; Garcia, Gustavo Journal: PLASMA SOURCES SCIENCE & TECHNOLOGY Publication date: 2022/03/01 DOI: 10.1088/1361-6595/ac4e22 Abstract: Absolute total electron detachment cross for O-2 (-) collisions with O-2 are reported for impact energies ranging from 10 to 1600 eV as measured with [...]

Devil’s staircase of topological Peierls insulators and Peierls supersolids

2022-09-19T15:57:10+02:00Tags: , |

Authors: Chanda, Titas; Gonzalez-Cuadra, Daniel; Lewenstein, Maciej; Tagliacozzo, Luca; Zakrzewski, Jakub Journal: SCIPOST PHYSICS Publication date: 2022/02/01 DOI: 10.21468/SciPostPhys.12.2.076 Abstract: We consider a mixture of ultracold bosonic atoms on a one-dimensional lattice described by the XXZ-Bose-Hubbard model, where the tunneling of one species depends on the spin state of a second deeply trapped species. We [...]

Tunable Directional Emission and Collective Dissipation with Quantum Metasurfaces

2022-09-19T15:57:10+02:00Tags: , |

Authors: Fernandez-Fernandez, D.; Gonzalez-Tudela, A. Journal: PHYSICAL REVIEW LETTERS Publication date: 2022/03/14 DOI: 10.1103/PhysRevLett.128.113601 Abstract: Subwavelength atomic arrays, recently labeled as quantum metamaterials, have emerged as an exciting platform for obtaining novel quantum optical phenomena. The strong interference effects in these systems generate subradiant excitations that propagate through the atomic array with very long lifetimes. [...]

Phase Diagram of 1+1D Abelian-Higgs Model and Its Critical Point

2022-09-19T15:57:10+02:00Tags: , |

Authors: Chanda, Titas; Lewenstein, Maciej; Zakrzewski, Jakub; Tagliacozzo, Luca Journal: PHYSICAL REVIEW LETTERS Publication date: 2022/02/28 DOI: 10.1103/PhysRevLett.128.090601 Abstract: We determine the phase diagram of the Abelian-Higgs model in one spatial dimension and time (1 + 1D) on a lattice. We identify a line of first order phase transitions separating the Higgs region from the [...]

Dynamics of Ring-Cleavage Reactions in Temozolomide Induced by Low-Energy Electron Attachment

2022-09-19T15:57:06+02:00Tags: , |

Authors: Arthur-Baidoo, Eugene; Izadi, Farhad; Guerra, Carlos; Garcia, Gustavo; Oncak, Milan; Denifl, Stephan Journal: FRONTIERS IN PHYSICS 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 [...]

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