240 citations · 2.3k across the 47 of their papers we have counts for
44 papers
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…
Non-linear-enabled localization in driven-dissipative photonic lattices
A. Muñoz de las Heras, A. Amo, A. González-Tudela
Recent experimental work has demonstrated the ability to achieve reconfigurable photon localization in lossy photonic lattices by continuously driving them with lasers strategicall…
Directional spontaneous emission in photonic crystal slabs
Erik Petrovish Navarro-Barón, Herbert Vinck-Posada, Alejandro González-Tudela
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 thi…
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…
Optically defined cavities in driven-dissipative photonic lattices
O. Jamadi, B. Real, K. Sawicki +11
The engineering of localised modes in photonic structures is one of the main targets of modern photonics. An efficient strategy to design these modes is to use the interplay of con…
Connecting steady-states of driven-dissipative photonic lattices with spontaneous collective emission phenomena
Alejandro González-Tudela
Recent experimental advances enable the fabrication of photonic lattices in which the light propagates with non-trivial energy dispersions. When interfaced with quantum emitters, s…
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…
Photon-mediated interactions near a Dirac photonic crystal slab
Erik P. Navarro-Barón, Herbert Vinck-Posada, Alejandro González-Tudela
Dirac energy-dispersions are responsible of the extraordinary transport properties of graphene. This motivated the quest for engineering such energy dispersions also in photonics,…
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…
Light-matter interactions near photonic Weyl points
Iñaki García-Elcano, Jorge Bravo-Abad, Alejandro González-Tudela
Weyl photons appear when two three-dimensional photonic bands with linear dispersion are degenerate at a single momentum point, labeled as Weyl point. These points have remarkable…
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…