536 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Universidad de ZaragozaES145 papers
- Instituto de Nanociencia y Materiales de AragónES39 papers
- Instituto de Biocomputación y Física de Sistemas Complejos37 papers
- Centre National de la Recherche ScientifiqueFR36 papers
- Sapienza University of RomeIT36 papers
- Consejo Superior de Investigaciones CientíficasES32 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT31 papers
- Universidad Complutense de MadridES26 papers
- Universidad de ExtremaduraES21 papers
- Instituto de Física FundamentalES19 papers
- Canfranc Underground LaboratoryES18 papers
- Centro de Astropartículas y Física de Altas EnergíasES18 papers
30 papers · 1 filter
Polariton-polariton coherent coupling in a molecular spin-superconductor chip
Carolina del Río, Marcos Rubín-Osanz, David Rodriguez +12
The ability to establish coherent communication channels is key for scaling up quantum devices. Here, we engineer interactions between distant polaritons, hybrid spin-photon excita…
Optimizing magnetic coupling in lumped element superconducting resonators for molecular spin qubits
Marcos Rubín-Osanz, David Rodriguez, Ignacio Gimeno +18
We engineer lumped-element superconducting resonators that maximize magnetic coupling to molecular spin qubits, achieving record single-spin couplings up to kHz and collectiv…
Gauge-Independent Emission Spectra and Quantum Correlations in the Ultrastrong Coupling Regime of Open System Cavity-QED
Will Salmon, Chris Gustin, Alessio Settineri +5
A quantum dipole interacting with an optical cavity is one of the key models in cavity quantum electrodynamics (cavity-QED). To treat this system theoretically, the typical approac…
Gauge Principle and Gauge Invariance in Two-Level Systems
Salvatore Savasta, Omar Di Stefano, Alessio Settineri +3
The quantum Rabi model is a widespread description of the coupling between a two-level system and a quantized single mode of an electromagnetic resonator. Issues about this model's…
A dissymmetric [Gd] coordination molecular dimer hosting six addressable spin qubits
Fernando Luis, Pablo J. Alonso, Olivier Roubeau +5
Artificial magnetic molecules are suitable hosts to one or several spin qubits, which could then implement small-scale algorithms. In order to become of practical use, such molecul…
Gauge Principle and Gauge Invariance in Quantum Two-Level Systems
Salvatore Savasta, Omar Di Stefano, Alessio Settineri +3
The quantum Rabi model is a widespread description for the coupling between a two-level system and a quantized single mode of an electromagnetic resonator. Issues about this model'…
Enhanced molecular spin-photon coupling at superconducting nanoconstrictions
I. Gimeno, W. Kersten, M. C. Pallarés +9
We combine top-down and bottom-up nanolithography to optimize the coupling of small molecular spin ensembles to GHz on-chip superconducting resonators. Nanoscopic constrictio…
Bound states in ultrastrong waveguide QED
Juan Román-Roche, Eduardo Sánchez-Burillo, David Zueco
We discuss the properties of bound states in finite-bandwidth waveguide QED beyond the Rotating Wave Approximation or excitation number conserving light-matter coupling models. The…
Chiral quantum optics in photonic sawtooth lattices
Eduardo Sánchez-Burillo, Chao Wan, David Zueco +1
Chiral quantum optics has become a burgeoning field due to its potential applications in quantum networks or quantum simulation of many-body physics. Current implementations are ba…
Spin squeezing by one-photon-two-atom excitations processes in atomic ensembles
Vincenzo Macrí, Franco Nori, Salvatore Savasta +1
It has been shown elsewhere that two spatially separated atoms can jointly absorb one photon, whose frequency is equal to the sum of the transition frequencies of the two atoms. We…
Single photons by quenching the vacuum
Eduardo Sánchez-Burillo, Luis Martín-Moreno, Juan José García-Ripoll +1
Heisenberg's uncertainty principle implies that the quantum vacuum is not empty but fluctuates. These fluctuations can be converted into radiation through nonadiabatic changes in t…
Strong coupling of a single photon to a magnetic vortex
María José Martínez-Pérez, David Zueco
Strong light-matter coupling is a necessary condition for exchanging information in quantum information protocols. It is used to couple different qubits (matter) via a quantum bus…
Ultrastrongly dissipative quantum Rabi model
David Zueco, Juanjo García-Ripoll
We discuss the equilibrium and out of equilibrium dynamics of cavity QED in presence of dissipation beyond the standard perturbative treatment of losses. Using the dynamical polaro…
-symmetric circuit-QED
Fernando Quijandría, Uta Naether, Sahin K. Özdemir +2
The Hermiticity axiom of quantum mechanics guarantees that the energy spectrum is real and the time evolution is unitary (probability-preserving). Nevertheless, non-Hermitian but $…
Emergent Causality and the N-photon Scattering Matrix in Waveguide QED
Eduardo Sánchez-Burillo, Andrea Cadarso, Luis Martín-Moreno +2
In this work we discuss the emergence of approximate causality in a general setup from waveguide QED -i.e. a one-dimensional propagating field interacting with a scatterer. We prov…
Dynamical signatures of bound states in waveguide QED
E. Sánchez-Burillo, D. Zueco, L. Martín-Moreno +1
We study the spontaneous decay of an impurity coupled to a linear array of bosonic cavities forming a single-band photonic waveguide. The average frequency of the emitted photon is…
Full two-photon downconversion of just a single photon
E. Sánchez-Burillo, L. Martín-Moreno, J. J. García-Ripoll +1
We demonstrate, both numerically and analytically, that it is possible to generate two photons from one and only one photon. We characterize the output two photon field and make ou…
Continuous matrix product states solution for the mixing/demixing transition in one-dimensional quantum fields
Fernando Quijandría, David Zueco
We solve the mixing-demixing transition in repulsive one-dimensional bose-bose mixtures. This is done numerically by means of the continuous matrix product states variational ansat…
Stationary discrete solitons in circuit QED
Uta Naether, Fernando Quijandría, Juan José García-Ripoll +1
We demonstrate that stationary localized solutions (discrete solitons) exist in a one dimensional Bose-Hubbard lattices with gain and loss in the semiclassical regime. Stationary s…
Nonlinear quantum optics in the (ultra)strong light-matter coupling
Eduardo Sánchez-Burillo, Juanjo García-Ripoll, Luis Martín-Moreno +1
The propagation of photons in one dimensional waveguides coupled to qubits is discussed, both in the strong and ultrastrong qubit-waveguide coupling. Special emphasis is pl…
Continuous matrix product states for coupled fields: Application to Luttinger Liquids and quantum simulators
Fernando Quijandría, Juan José García-Ripoll, David Zueco
A way of constructing continuous matrix product states (cMPS) for coupled fields is presented here. The cMPS is a variational \emph{ansatz} for the ground state of quantum field th…
Scattering in the ultrastrong regime: nonlinear optics with one photon
Eduardo Sánchez-Burillo, David Zueco, Juanjo García-Ripoll +1
The scattering of a flying photon by a two-level system ultrastrongly coupled to a one-dimensional photonic waveguide is studied numerically. The photonic medium is modeled as an a…
Influence of Non-Markovian Dynamics in Thermal-Equilibrium Uncertainty-Relations
Leonardo A. Pachon, Johan F. Triana, David Zueco +1
Contrary to the conventional wisdom that deviations from standard thermodynamics originate from the strong coupling to the bath, it is shown that in quantum mechanics, these deviat…
Quantum chaos in an ultra-strongly coupled bosonic junction
Uta Naether, Juan José García-Ripoll, Juan José Mazo +1
The classical and quantum dynamics of two ultra-strongly coupled and weakly nonlinear resonators cannot be explained using the Discrete Nonlinear Schrödinger Equation or the Bose-H…