213 citations · 732 across the 28 of their papers we have counts for
28 papers
A "squeezed polaron" variational wavefunction for the spin boson model
Diego Barberena, Nigel Cooper
The localization transition of the sub-Ohmic spin-boson model generates boson bath correlations that are, at low frequencies, analytically inaccessible to standard coherent-state-p…
Dissipative generation of spin squeezing in the resolved vacuum Rabi splitting limit
Edwin Chaparro, Eric Yilun Song, Diego Barberena +3
Harnessing dissipation in the presence of strong symmetries has recently emerged as a promising route for generating entanglement in atomic clocks. However, previous proposals reli…
Measurement-induced phase transitions in monitored infinite-range interacting systems
Anna Delmonte, Zejian Li, Gianluca Passarelli +4
A key challenge in observing measurement-induced phase transitions is the mitigation of the post-selection barrier, which causes the reproducibility of specific sequences of measur…
A dissipation-induced superradiant transition in a strontium cavity-QED system
Eric Yilun Song, Diego Barberena, Dylan J. Young +7
In cavity quantum electrodynamics (QED), emitters and a resonator are coupled together to enable precise studies of quantum light-matter interactions. Over the past few decades, th…
Time-resolved pairing gap spectroscopy in a quantum simulator of fermionic superfluidity inside an optical cavity
Dylan J. Young, Eric Yilun Song, Anjun Chu +6
We use an ensemble of laser-cooled strontium atoms in a high-finesse cavity to cleanly emulate the technique of rf spectroscopy employed in studies of BEC-BCS physics in fermionic…
Overview of projective quantum measurements
Diego Barberena, Aaron J. Friedman
We provide an overview of standard "projective" quantum measurements with the goal of elucidating connections between theory and experiment. We make use of a unitary "Stinespring"…
Directional superradiance in a driven ultracold atomic gas in free-space
Sanaa Agarwal, Edwin Chaparro, Diego Barberena +6
Ultra-cold atomic systems are among the most promising platforms that have the potential to shed light on the complex behavior of many-body quantum systems. One prominent example i…
Exploiting nonclassical motion of a trapped ion crystal for quantum-enhanced metrology of global and differential spin rotations
R. J. Lewis-Swan, J. C. Zuñiga Castro, D. Barberena +1
We theoretically investigate prospects for the creation of nonclassical spin states in trapped ion arrays by coupling to a squeezed state of the collective motion of the ions. The…
Trade-offs between unitary and measurement induced spin squeezing in cavity QED
Diego Barberena, Anjun Chu, James K. Thompson +1
We study the combined effects of measurements and unitary evolution on the preparation of spin squeezing in an ensemble of atoms interacting with a single electromagnetic field mod…
Driven-dissipative four-mode squeezing of multilevel atoms in an optical cavity
Bhuvanesh Sundar, Diego Barbarena, Ana Maria Rey +1
We utilize multilevel atoms trapped in a driven resonant optical cavity to produce scalable multi-mode squeezed states for quantum sensing and metrology. While superradiance or col…
Critical steady states of all-to-all squeezed and driven superradiance: An analytic approach
Diego Barberena, Ana Maria Rey
We analyse the properties across steady state phase transitions of two all-to-all driven-dissipative spin models that describe possible dynamics of N two-level systems inside an op…
Spin squeezing in mixed-dimensional anisotropic lattice models
Mikhail Mamaev, Diego Barberena, Ana Maria Rey
We describe a theoretical scheme for generating scalable spin squeezing with nearest-neighbour interactions between spin-1/2 particles in a 3D lattice, which are naturally present…
Observing dynamical phases of BCS superconductors in a cavity QED simulator
Dylan J. Young, Anjun Chu, Eric Yilun Song +7
In conventional Bardeen-Cooper-Schrieffer (BCS) superconductors, electrons with opposite momenta bind into Cooper pairs due to an attractive interaction mediated by phonons in the…
Ultra Narrow Linewidth Frequency Reference via Measurement and Feedback
Diego Barberena, Robert J. Lewis-Swan, Ana Maria Rey +1
The generation of very narrow linewidth light sources is of great importance in modern science. One such source is the superradiant laser, which relies on collectively interacting…
Squeezing multilevel atoms in dark states via cavity superradiance
Bhuvanesh Sundar, Diego Barberena, Ana Maria Rey +1
We describe a method to create and store scalable and long-lived entangled spin-squeezed states within a manifold of many-body cavity dark states using collective emission of light…
Photon-mediated correlated hopping in a synthetic ladder
Anjun Chu, Asier Piñeiro Orioli, Diego Barberena +2
We propose a new direction in quantum simulation that uses multilevel atoms in an optical cavity as a toolbox to engineer new types of bosonic models featuring correlated hopping p…
Bosonic pair production and squeezing for optical phase measurements in long-lived dipoles coupled to a cavity
Bhuvanesh Sundar, Diego Barberena, Asier Piñeiro Orioli +4
We propose to simulate bosonic pair creation using large arrays of long-lived dipoles with multilevel internal structure coupled to an undriven optical cavity. Entanglement between…
Fast generation of spin squeezing via resonant spin-boson coupling
Diego Barberena, Sean R. Muleady, John J. Bollinger +2
We propose protocols for the creation of useful entangled states in a system of spins collectively coupled to a bosonic mode, directly applicable to trapped-ion and cavity QED setu…
Engineering infinite-range SU() interactions with spin-orbit-coupled fermions in an optical lattice
Michael A. Perlin, Diego Barberena, Mikhail Mamaev +3
We study multilevel fermions in an optical lattice described by the Hubbard model with on site SU()-symmetric interactions. We show that in an appropriate parameter regime this…
Quantum-enhanced sensing of displacements and electric fields with large trapped-ion crystals
Kevin A. Gilmore, Matthew Affolter, Robert J. Lewis-Swan +4
Developing the isolation and control of ultracold atomic systems to the level of single quanta has led to significant advances in quantum sensing, yet demonstrating a quantum advan…
Characterizing the dynamical phase diagram of the Dicke model via classical and quantum probes
R. J. Lewis-Swan, S. R. Muleady, D. Barberena +2
We theoretically study the dynamical phase diagram of the Dicke model in both classical and quantum limits using large, experimentally relevant system sizes. Our analysis elucidate…
Spin qudit tomography and state reconstruction error
Michael A. Perlin, Diego Barberena, Ana Maria Rey
We consider the task of performing quantum state tomography on a -level spin qudit, using only measurements of spin projection onto different quantization axes. After introducin…
A cavity-QED quantum simulator of dynamical phases of a BCS superconductor
Robert J. Lewis-Swan, Diego Barberena, Julia R. K. Cline +3
We propose to simulate dynamical phases of a BCS superconductor using an ensemble of cold atoms trapped in an optical cavity. Effective Cooper pairs are encoded via internal states…
Atom-light entanglement for precise field sensing in the optical domain
Diego Barberena, Robert J. Lewis-Swan, Ana Maria Rey +1
Macroscopic arrays of cold atoms trapped in optical cavities can reach the strong atom-light collective coupling regime thanks to the simultaneous interactions of the cavity mode w…