Light-matter interactions in quantum nanophotonic devices

2024-03-27T14:34:42+01:00Tags: , , |

Authors: Gonzalez-Tudela, Alejandro; Reiserer, Andreas; Garcia-Ripoll, Juan Jose; Garcia-Vidal, Francisco J. Journal: NATURE REVIEWS PHYSICS Publication date: 2024/01/25 DOI: 10.1038/s42254-023-00681-1 Abstract: Nanophotonics offers opportunities for engineering and exploiting the quantum properties of light by integrating quantum emitters into nanostructures, and offering reliable paths to quantum technology applications such as sources of quantum light or new [...]

Cooling microwave fields into general multimode Gaussian states

2024-03-27T13:58:36+01:00Tags: , |

Authors: Yazdi, Nahid; Garcia-Ripoll, Juan Jose; Porras, Diego; Navarrete-Benlloch, Carlos Journal: NEW JOURNAL OF PHYSICS Publication date: 2023/08/01 DOI: 10.1088/1367-2630/acf0e2 Abstract: We show that a collection of lossy multichromatic modulated qubits can be used to dissipatively engineer arbitrary Gaussian states of a set of bosonic modes. Our ideas are especially suited to superconducting-circuit architectures, where [...]

Topological multimode waveguide QED

2024-03-27T13:58:33+01:00Tags: , |

Authors: Vega, C.; Porras, D.; Gonzalez-Tudela, A. Journal: PHYSICAL REVIEW RESEARCH Publication date: 2023/04/17 DOI: 10.1103/PhysRevResearch.5.023031 Abstract: Topological insulators feature a number of topologically protected boundary modes linked to the value of their bulk invariant. While in one-dimensional systems the boundary modes are zero dimensional and localized, in two-dimensional topological insulators the boundary modes are [...]

Variational Quantum Simulators Based on Waveguide QED

2024-03-27T13:58:30+01:00Tags: , |

Authors: Tabares, C.; de las Heras, A. Munoz; Tagliacozzo, L.; Porras, D.; Gonzalez-Tudela, A. Journal: PHYSICAL REVIEW LETTERS Publication date: 2023/08/14 DOI: 10.1103/PhysRevLett.131.073602 Abstract: Waveguide QED simulators are analog quantum simulators made by quantum emitters interacting with one-dimensional photonic band gap materials. One of their remarkable features is that they can be used to engineer [...]

Quantum metrology with critical driven-dissipative collective spin system

2024-03-27T13:58:17+01:00Tags: , |

Authors: Pavlov, Venelin P.; Porras, Diego; Ivanov, Peter A. Journal: PHYSICA SCRIPTA Publication date: 2023/09/01 DOI: 10.1088/1402-4896/ace99f Abstract: We propose two critical dissipative quantum metrology schemes for single parameter estimation which are based on a quantum probe consisting of a coherently driven ensemble of N spin-1/2 particles under the effect of a collective spin decay. [...]

Certification of a non-projective qudit measurement using multiport beamsplitters

2024-03-27T13:58:07+01:00Tags: , |

Authors: Martinez, Daniel; Gomez, Esteban S.; Carine, Jaime; Pereira, Luciano; Delgado, Aldo; Walborn, Stephen P.; Tavakoli, Armin; Lima, Gustavo Journal: NATURE PHYSICS Publication date: 2023/02/01 DOI: 10.1038/s41567-022-01845-z Abstract: [Martinez, Daniel; Gomez, Esteban S.; Delgado, Aldo; Walborn, Stephen P.; Lima, Gustavo] Univ Concepcion, Dept Fis, Concepcion, Chile; [Martinez, Daniel; Gomez, Esteban S.; Carine, Jaime; Delgado, Aldo; [...]

Experimental and theoretical study on elastic electron interaction with halothane molecule in the intermediate energy range

2024-03-27T13:58:04+01:00Tags: , |

Authors: Maljkovic, Jelena B.; Vukalovic, Jelena; Pesic, Zoran D.; Blanco, Francisco; Garcia, Gustavo; Marinkovic, Bratislav P. Journal: EUROPEAN PHYSICAL JOURNAL PLUS Publication date: 2023/04/21 DOI: 10.1140/epjp/s13360-023-03967-6 Abstract: We present a combined theoretical and experimental absolute differential (DCS) and integral (ICS) cross sections for elastic electron scattering from halothane molecule in the intermediate energy range from [...]

Missing levels in intermediate spectra

2024-03-27T13:57:57+01:00Tags: , , |

Authors: Hita-Perez, Maria; Munoz, Laura; Molina, Rafael A. Journal: JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL Publication date: 2023/12/15 DOI: 10.1088/1751-8121/ad0d1e Abstract: We derive an expression for the nearest-neighbor spacing distribution P(s) of the energy levels of quantum systems with intermediate dynamics between regularity and chaos and missing levels due to random experimental errors. The expression [...]

Hardware-Efficient Entangled Measurements for Variational Quantum Algorithms

2024-03-27T13:57:38+01:00Tags: , |

Authors: Escudero, Francisco; Fernandez-Fernandez, David; Jauma, Gabriel; Penas, Guillermo F.; Pereira, Luciano Journal: PHYSICAL REVIEW APPLIED Publication date: 2023/09/20 DOI: 10.1103/PhysRevApplied.20.034044 Abstract: Variational algorithms have received significant attention in recent years due to their potential to solve practical problems using noisy intermediate-scale quantum (NISQ) devices. A fundamental step of these algorithms is the evaluation of [...]

Quantum Approximate Optimization Algorithm Pseudo-Boltzmann States

2024-03-27T13:57:35+01:00Tags: , |

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 [...]

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