Authors: Vivas-Viana, Alejandro; Gonzalez-Tudela, Alejandro; Sanchez Munoz, Carlos Journal: PHYSICAL REVIEW A Publication date: 2022/07/22 DOI: 10.1103/PhysRevA.106.012217 Abstract: Virtual states are a central concept in quantum mechanics. By definition, the probability of finding a quantum system in a virtual state should be vanishingly small at all times. In contrast to this notion, we report a [...]
Authors: Gomez-Leon, Alvaro; Ramos, Tomas; Gonzalez-Tudela, Alejandro; Porras, Diego Journal: PHYSICAL REVIEW A Publication date: 2022/07/25 DOI: 10.1103/PhysRevA.106.L011501 Abstract: We relate observables in open quantum systems with the topology of non-Hermitian models using the Keldysh path-integral method. This allows to extract an effective Hamiltonian from the Green's function which contains all the relevant topological information [...]
Authors: Gomez-Leon, Alvaro Journal: PHYSICAL REVIEW A Publication date: 2022/08/15 DOI: 10.1103/PhysRevA.106.022609 Abstract: We study photon-mediated interactions between molecular spin qudits in the dispersive regime of operation. We derive from a microscopic model the effective interaction between molecular spins, including their crystal field anisotropy (i.e., the presence of nonlinear spin terms) and their multilevel structure. [...]
Authors: Amorim, R. A. A.; Diniz, A. C.; Oliveira, C. B.; Oliveira Junior, O. L.; Jones, D. B.; Blanco, F.; Garcia, G.; Brunger, M. J.; Lopes, M. C. A. Journal: EUROPEAN PHYSICAL JOURNAL D Publication date: 2022/11/01 DOI: 10.1140/epjd/s10053-022-00537-w Abstract: In this work, the mass spectrum (MS) and the appearance energies (AEs) of the ionic [...]
Authors: Amorim, R. A. A.; Diniz, A. C.; Oliveira, C. B.; Oliveira Junior, O. L.; Jones, D. B.; Blanco, F.; Garcia, G.; Brunger, M. J.; Lopes, M. C. A. Journal: EUROPEAN PHYSICAL JOURNAL D Publication date: 2022/11/01 DOI: 10.1140/epjd/s10053-022-00537-w Abstract: In this work, the mass spectrum (MS) and the appearance energies (AEs) of the ionic [...]
Authors: Valido, Antonio A.; Jose Garcia-Ripoll, Juan Journal: PHYSICAL REVIEW A Publication date: 2021/03/24 DOI: 10.1103/PhysRevA.103.032613 Abstract: In this paper we study the phase sensitivity of generic linear interferometric schemes using Gaussian resources and measurements. Our formalism is based on the Fisher information. This allows us to separate the contributions of the measurement scheme, the [...]
Authors: Ramos, Tomas; Jose Garcia-Ripoll, Juan; Porras, Diego Journal: PHYSICAL REVIEW A Publication date: 2021/03/18 DOI: 10.1103/PhysRevA.103.033513 Abstract: We present a topological approach to the input-output relations of photonic driven-dissipative systems acting as directional amplifiers. Our theory relies on a mapping from the optical non-Hermitian coupling matrix to an effective topological insulator Hamiltonian. This mapping [...]
Authors: Arguello-Luengo, Javier; Shi, Tao; Gonzalez-Tudela, Alejandro Journal: PHYSICAL REVIEW A Publication date: 2021/04/14 DOI: 10.1103/PhysRevA.103.043318 Abstract: Using quantum systems to efficiently solve quantum chemistry problems is one of the long-sought applications of near-future quantum technologies. In a recent work [J. Arguello-Luengo et al., Nature (London) 574, 215 (2019)], ultracold fermionic atoms have been proposed [...]
Authors: Agusti, A.; Garcia-Alvarez, L.; Solano, E.; Sabin, C. Journal: PHYSICAL REVIEW A Publication date: 2021/06/01 DOI: 10.1103/PhysRevA.103.062201 Abstract: The generation of photons from the vacuum by means of the movement of a mirror is known as the dynamical Casimir effect (DCE). In general, this phenomenon is effectively described by a field with time-dependent boundary [...]
Authors: Marinkovic, B. P.; Tosic, S. D.; Sevic, D.; McEachran, R. P.; Blanco, F.; Garcia, G.; Brunger, M. J. Journal: PHYSICAL REVIEW A Publication date: 2021/08/10 DOI: 10.1103/PhysRevA.104.022808 Abstract: We present angle-differential and angle-integrated cross sections for electron-impact excitation of the (4d(10)5s) S-2(1/ 2) -> (4d(9)5s(2)) D-2(3/ 2) and (4d(10)5s) S-2(1/ 2) ->(4d(10)6s) S-2(1/ 2) [...]
