Spin Many-Body Phases in Standard- and Topological-Waveguide QED Simulators

2023-02-21T13:37:09+01:00Tags: , , |

Authors: Bello, M.; Platero, G.; Gonzalez-Tudela, A. Journal: PRX QUANTUM Publication date: 2022/03/07 DOI: 10.1103/PRXQuantum.3.010336 Abstract: Waveguide QED has emerged as a powerful analog quantum simulator due to the possibility of mediating versatile spin-spin interactions with tunable sign, range, and even dimerization. Yet, despite their potential, the many-body phases emerging from these systems have only [...]

Tunable Directional Emission and Collective Dissipation with Quantum Metasurfaces

2023-02-21T13:37:05+01:00Tags: , |

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. [...]

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

2023-02-21T13:37:02+01:00Tags: , |

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 [...]

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

2023-02-21T13:36:58+01:00Tags: , |

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 [...]

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

2023-02-21T13:36:57+01:00Tags: , |

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 [...]

Benchmarking quantum annealing dynamics: The spin-vector Langevin model

2023-02-21T13:36:55+01:00Tags: , |

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 [...]

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

2023-02-21T13:36:47+01:00Tags: , |

Authors: Garbe, Louis; Abah, Obinna; Felicetti, Simone; Puebla, Ricardo Journal: QUANTUM SCIENCE AND TECHNOLOGY 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 [...]

Complete Physical Characterization of Quantum Nondemolition Measurements via Tomography

2023-02-21T13:36:47+01:00Tags: , |

Authors: Pereira, L.; Garcia-Ripoll, J. J.; Ramos, And T. Journal: PHYSICAL REVIEW LETTERS Publication date: 2022/06/29 DOI: 10.1103/PhysRevLett.129.010402 Abstract: We introduce a self-consistent tomography for arbitrary quantum nondemolition (QND) detectors. Based on this, we build a complete physical characterization of the detector, including the measurement processes and a quantification of the fidelity, ideality, and backaction [...]

Bound Electron Enhanced Radiosensitisation of Nimorazole upon Charge Transfer

2023-02-21T13:36:46+01:00Tags: , |

Authors: Kumar, Sarvesh; Ben Chouikha, Islem; Kerkeni, Boutheina; Garcia, Gustavo; Limao-Vieira, Paulo Journal: MOLECULES Publication date: 2022/07/01 DOI: 10.3390/molecules27134134 Abstract: This novel work reports nimorazole (NIMO) radiosensitizer reduction upon electron transfer in collisions with neutral potassium (K) atoms in the lab frame energy range of 10-400 eV. The negative ions formed in this energy range [...]

Sensing the ortho Positions in C6Cl6 and C6H4Cl2 from Cl-2(-) Formation upon Molecular Reduction

2023-02-21T13:36:29+01:00Tags: , |

Authors: Kumar, Sarvesh; Romero, Jose; Probst, Michael; Maihom, Thana; Garcia, Gustavo; Limao-Vieira, Paulo Journal: MOLECULES Publication date: 2022/08/01 DOI: 10.3390/molecules27154820 Abstract: The geometrical effect of chlorine atom positions in polyatomic molecules after capturing a low-energy electron is shown to be a prevalent mechanism yielding Cl-2(-). In this work, we investigated hexachlorobenzene reduction in electron transfer [...]

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