Directional spontaneous emission in photonic crystal slabs

2024-03-27T14:34:49+01:00Tags: , , |

Authors: Navarro-Baron, Erik P.; Vinck-Posada, Herbert; Gonzalez-Tudela, Alejandro Journal: NANOPHOTONICS Publication date: 2024/02/25 DOI: 10.1515/nanoph-2023-0843 Abstract: Spontaneous emission is one of the most fundamental out-of-equilibrium processes in which an excited quantum emitter relaxes to the ground state due to quantum fluctuations. In this process, a photon is emitted that can interact with other nearby emitters [...]

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 [...]

Transmon-qubit readout using an in situ bifurcation amplification in the mesoscopic regime

2024-03-27T13:57:26+01:00Tags: , |

Authors: Dassonneville, R.; Ramos, T.; Milchakov, V.; Mori, C.; Planat, L.; Foroughi, F.; Naud, C.; Hasch-Guichard, W.; Garcia-Ripoll, J. J.; Roch, N.; Buisson, O. Journal: PHYSICAL REVIEW APPLIED Publication date: 2023/10/19 DOI: 10.1103/PhysRevApplied.20.044050 Abstract: We demonstrate a transmon-qubit readout based on the nonlinear response to a drive of polaritonic meters in situ coupled to the [...]

Blueprint for a Molecular-Spin Quantum Processor

2024-03-27T13:57:23+01:00Tags: , |

Authors: Chiesa, A.; Roca, S.; Chicco, S.; de Ory, M. C.; Gomez-Leon, A.; Gomez, A.; Zueco, D.; Luis, F.; Carretta, S. Journal: PHYSICAL REVIEW APPLIED Publication date: 2023/06/21 DOI: 10.1103/PhysRevApplied.19.064060 Abstract: The implementation of a universal quantum processor still poses fundamental issues related to error mitigation and correction, which demand investigation of also platforms and [...]

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 [...]

Universal Deterministic Quantum Operations in Microwave Quantum Links

2023-02-21T13:36:53+01:00Tags: , |

Authors: Penas, Guillermo F.; Puebla, Ricardo; Ramos, Tomas; Rabl, Peter; Jose Garcia-Ripoll, Juan Journal: PHYSICAL REVIEW APPLIED Publication date: 2022/05/24 DOI: 10.1103/PhysRevApplied.17.054038 Abstract: We propose a realistic setup, inspired by already existing experiments, within which we develop a general formalism for the implementation of distributed quantum gates. Mediated by a quantum link that establishes a [...]

Dispersive Readout of Molecular Spin Qudits

2023-02-21T13:36:48+01:00Tags: , |

Authors: Gomez-Leon, Alvaro; Luis, Fernando; Zueco, David Journal: PHYSICAL REVIEW APPLIED Publication date: 2022/06/14 DOI: 10.1103/PhysRevApplied.17.064030 Abstract: We study the physics of a magnetic molecule described by a ???giant??? spin with multiple (d > 2) spin states interacting with the quantized cavity field produced by a superconducting resonator. By means of the input-output formalism, we [...]

Variational Determination of Multiqubit Geometrical Entanglement in Noisy Intermediate-Scale Quantum Computers

2023-02-21T13:36:27+01:00Tags: , |

Authors: Munoz-Moller, A. D.; Pereira, L.; Zambrano, L.; Cortes-Vega, J.; Delgado, A. Journal: PHYSICAL REVIEW APPLIED Publication date: 2022/08/17 DOI: 10.1103/PhysRevApplied.18.024048 Abstract: Current noise levels in physical realizations of qubits and quantum operations limit the applicability of conventional methods to characterize entanglement. In this adverse scenario, we follow a quantum variational approach to estimate the [...]

Ultrastrong Capacitive Coupling of Flux Qubits

2022-04-19T10:21:48+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 [...]

Helium Isotopes Quantum Sieving through Graphtriyne Membranes

2022-04-05T17:41:22+02:00Tags: , , , |

Authors: Hernandez, Marta I.; Bartolomei, Massimiliano; Campos-Martinez, Jose Journal: NANOMATERIALS Publication date: 2021/01/01 DOI: 10.3390/nano11010073 Abstract: We report accurate quantum calculations of the sieving of Helium atoms by two-dimensional (2D) graphtriyne layers with a new interaction potential. Thermal rate constants and permeances in an ample temperature range are computed and compared for both Helium isotopes. [...]

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