240 citations · 2.3k across the 47 of their papers we have counts for
36 papers · 1 filter
Enabling Deterministic Passive Quantum State Transfer with Giant Atoms
Oliver Diekmann, Enrico Di Benedetto, Nicolas Jungwirth +7
Achieving quantum state transfer in passive ways can become a powerful asset for scalable quantum networks. Here, we demonstrate how giant atoms coupled to 1D waveguides provide a…
Improving quantum metrology protocols with programmable photonic circuits
A. Muñoz de las Heras, D. Porras, A. González-Tudela
Photonic quantum metrology enables the measurement of physical parameters with precision surpassing classical limits by using quantum states of light. However, generating states pr…
Dipole-dipole interactions mediated by a photonic flat band
Enrico Di Benedetto, Alejandro Gonzalez-Tudela, Francesco Ciccarello
Flat bands (FBs) are energy bands with zero group velocity, which in electronic systems were shown to favor strongly correlated phenomena. Indeed, a FB can be spanned with a basis…
Photonic quantum metrology with variational quantum optical non-linearities
A. Muñoz de las Heras, C. Tabares, J. T. Schneider +3
Photonic quantum metrology harnesses quantum states of light, such as NOON or Twin-Fock states, to measure unknown parameters beyond classical precision limits. Current protocols s…
Probing and harnessing photonic Fermi arc surface states using light-matter interactions
Iñaki García-Elcano, Jaime Merino, Jorge Bravo-Abad +1
Fermi arcs, i.e., surface states connecting topologically-distinct Weyl points, represent a paradigmatic manifestation of the topological aspects of Weyl physics. Here, we investig…
Driven-dissipative topological phases in parametric resonator arrays
Álvaro Gómez-León, Tomás Ramos, Alejandro González-Tudela +1
We study the phenomena of topological amplification in arrays of parametric oscillators. We find two phases of topological amplification, both with directional transport and expone…
Tuning long-range fermion-mediated interactions in cold-atom quantum simulators
Javier Argüello-Luengo, Alejandro González-Tudela, Daniel González-Cuadra
Engineering long-range interactions in cold-atom quantum simulators can lead to exotic quantum many-body behavior. Fermionic atoms in ultracold atomic mixtures can act as mediators…
Decimation technique for open quantum systems: a case study with driven-dissipative bosonic chains
Álvaro Gómez-León, Tomás Ramos, Diego Porras +1
The unavoidable coupling of quantum systems to external degrees of freedom leads to dissipative (non-unitary) dynamics, which can be radically different from closed-system scenario…
Bridging the gap between topological non-Hermitian physics and open quantum systems
Álvaro Gómez-León, Tomás Ramos, Alejandro González-Tudela +1
We relate topological properties of non-Hermitian systems and observables of quantum open systems by using the Keldysh path-integral method. We express Keldysh Green's functions in…
Photon-mediated Stroboscopic Quantum Simulation of a Lattice Gauge Theory
Tsafrir Armon, Shachar Ashkenazi, Gerardo García-Moreno +2
Quantum simulation of lattice gauge theories (LGTs), aiming at tackling non-perturbative particle and condensed matter physics, has recently received a lot of interest and attentio…
Quantum electrodynamics in anisotropic and tilted Dirac photonic lattices
J. Redondo-Yuste, M. Blanco de Paz, P. A. Huidobro +1
One of the most striking predictions of quantum electrodynamics is that vacuum fluctuations of the electromagnetic field can lead to spontaneous emission of atoms as well as photon…
Engineering analog quantum chemistry Hamiltonians using cold atoms in optical lattices
Javier Argüello-Luengo, Tao Shi, Alejandro González-Tudela
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, ultra-cold fermi…
Collective radiation from distant emitters
Kanu Sinha, Alejandro González-Tudela, Yong Lu +1
Waveguides allow for direct coupling of emitters separated by large distances, offering a path to connect remote quantum systems. However, when facing the distances needed for prac…
Quantum electrodynamics in a topological waveguide
Eunjong Kim, Xueyue Zhang, Vinicius S. Ferreira +7
While designing the energy-momentum relation of photons is key to many linear, non-linear, and quantum optical phenomena, a new set of light-matter properties may be realized by em…
On the limits of photon-mediated interactions in one-dimensional photonic baths
E. Sánchez-Burillo, D. Porras, A. González-Tudela
The exchange of off-resonant propagating photons between distant quantum emitters induces coherent interactions among them. The range of such interactions, and whether they are acc…
Theory of waveguide-QED with moving emitters
Eduardo Sánchez-Burillo, Alejandro González-Tudela, Carlos Gonzalez-Ballestero
We theoretically study a system composed by a waveguide and a moving quantum emitter in the single excitation subspace, treating the emitter motional degree of freedom quantum mech…
Quantum Simulation of 2D Quantum Chemistry in Optical Lattices
Javier Argüello-Luengo, Alejandro González-Tudela, Tao Shi +2
Benchmarking numerical methods in quantum chemistry is one of the key opportunities that quantum simulators can offer. Here, we propose an analog simulator for discrete 2D quantum…
Qubit-photon corner states in all dimensions
Adrian Feiguin, Juan Jose Garcia-Ripoll, Alejandro Gonzalez-Tudela
A single quantum emitter coupled to a one-dimensional photon field can perfectly trap a photon when placed close to a mirror. This occurs when the interference between the emitted…
Multimode Fock states with large photon number: effective descriptions and applications in quantum metrology
M. Perarnau-Llobet, A. González-Tudela, J. I. Cirac
We develop general tools to characterise and efficiently compute relevant observables of multimode -photon states generated in non-linear decays in one-dimensional waveguides. W…
Symmetries and Conservation Laws in Quantum Trajectories: Dissipative Freezing
Carlos Sánchez Muñoz, Berislav Buca, Joseph Tindall +3
In driven-dissipative systems, the presence of a strong symmetry guarantees the existence of several steady states belonging to different symmetry sectors. Here we show that, when…
Cold atoms in twisted bilayer optical potentials
A. González-Tudela, J. I. Cirac
The possibility of creating crystal bilayers twisted with respect to each other has led to the discovery of a wide range of novel electron correlated phenomena whose full understan…
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…
Tunable and robust long-range coherent interactions between quantum emitters mediated by Weyl bound states
Iñaki García-Elcano, Alejandro González-Tudela, Jorge Bravo-Abad
Long-range coherent interactions between quantum emitters are instrumental for quantum information and simulation technologies, but they are generally difficult to isolate from dis…
Anisotropic quantum emitter interactions in two-dimensional photonic-crystal baths
A. González-Tudela, F. Galve
Quantum emitters interacting with two-dimensional photonic-crystal baths experience strong and anisotropic collective dissipation when they are spectrally tuned to 2D Van-Hove sing…