Quantum Approximate Optimization Algorithm Pseudo-Boltzmann States

2023-03-30T23:12:29+02:00Tags: , |

Authors: Diez-Valle, Pablo; Porras, Diego; Garcia-Ripoll, Juan Jose Journal: PHYSICAL REVIEW LETTERS Publication date: 2023/02/02 DOI: 10.1103/PhysRevLett.130.050601 Abstract: In this Letter, we provide analytical and numerical evidence that the single-layer quantum approximate optimization algorithm on universal Ising spin models produces thermal-like states. We find that these pseudo-Boltzmann states can not be efficiently simulated on classical [...]

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

2023-02-21T13:37:26+01:00Tags: , |

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 [...]

Ultrastrong Capacitive Coupling of Flux Qubits

2023-02-21T13:37:26+01:00Tags: , |

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 [...]

Shining light into the Higgs portal with gamma gamma colliders

2023-02-21T13:37:16+01:00Tags: , |

Authors: Garcia-Abenza, A.; No, J. M. Journal: EUROPEAN PHYSICAL JOURNAL C Publication date: 2022/02/01 DOI: 10.1140/epjc/s10052-022-10089-3 Abstract: High-energy ( )gamma gamma colliders constitute a potential running mode of future lepton colliders such as the ILC and CLIC. We study the sensitivity of a high-energy gamma gamma collider to the Higgs portal scenario to a hidden [...]

Devil’s staircase of topological Peierls insulators and Peierls supersolids

2023-02-21T13:37:15+01:00Tags: , |

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 [...]

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

2023-02-21T13:37:13+01:00Tags: , |

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 [...]

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

2023-02-21T13:37:12+01:00Tags: , |

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 [...]

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 [...]

Go to Top