221 citations · 2.2k across the 53 of their papers we have counts for
36 papers · 1 filter
Variational quantum state preparation within an entangle-rotate circuit framework for quantum-enhanced metrology in noisy systems
Juan C. Zuñiga Castro, Jeffrey Larson, Matt Menickelly +4
We investigate the generation of quantum states for precision metrology in noisy two-level systems. These states are obtained by optimizing a variational quantum circuit to maximiz…
Quantum simulation of the Dicke model in a two-dimensional ion crystal
Bryce Bullock, Sean R. Muleady, Jennifer F. Lilieholm +6
Quantum many-body systems driven far from equilibrium can exhibit phase transitions, chaos and entanglement, but probing these phenomena in large, nearly closed systems remains cha…
Universal Long-Time Behavior of the Quantum Fisher Information in Dynamical Quantum Phase Transitions
J. Mumford, R. J. Lewis-Swan
We investigate dynamical quantum phase transitions (DQPTs) in quantum systems that possess well-defined classical limits, focusing on the spinor Bose-Einstein condensate and the Li…
Characterizing the transition from topology to chaos in a kicked quantum system
J. Mumford, H. -Y. Xie, R. J. Lewis-Swan
This work theoretically investigates the transition from topology to chaos in a periodically driven system consisting of a quantum top coupled to a spin-1/2 particle. The system is…
Challenges with Differentiable Quantum Dynamics
Sri Hari Krishna Narayanan, Michael Perlin, Robert Lewis-Swan +4
Differentiable quantum dynamics require automatic differentiation of a complex-valued initial value problem, which numerically integrates a system of ordinary differential equation…
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…
A matter wave Rarity-Tapster interferometer to demonstrate non-locality
Kieran F. Thomas, Bryce M. Henson, Yu Wang +4
We present an experimentally viable approach to demonstrating quantum non-locality in a matter wave system via a Rarity-Tapster interferometer using two -wave scattering halos g…
Time-of-Flight Quantum Tomography of Single Atom Motion
M. O. Brown, S. R. Muleady, W. J. Dworschack +4
Time of flight is an intuitive way to determine the velocity of particles and lies at the heart of many capabilities ranging from mass spectrometry to fluid flow measurements. Here…
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…
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…
Identifying and harnessing dynamical phase transitions for quantum-enhanced sensing
Qingze Guan, Robert J. Lewis-Swan
We use the quantum Fisher information (QFI) to diagnose a dynamical phase transition (DPT) in a closed quantum system, which is usually defined in terms of non-analytic behaviour o…
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…
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…
Detecting out-of-time-order correlations via quasi-adiabatic echoes as a tool to reveal quantum coherence in equilibrium quantum phase transitions
Robert J. Lewis-Swan, Sean R. Muleady, Ana Maria Rey
We propose a new dynamical method to connect equilibrium quantum phase transitions and quantum coherence using out-of-time-order correlations (OTOCs). Adopting the iconic Lipkin-Me…
Single-Particle Decoherence Can Improve Spin-Squeezing Generated In Collective Dynamics
K. Tucker, D. Barberena, R. J. Lewis-Swan +3
We study the generation of spin-squeezing in arrays of long-lived dipoles subject to collective emission, coherent drive, elastic interactions, and spontaneous emission. Counter-in…
Exploring dynamical phase transitions with cold atoms in an optical cavity
Juan A. Muniz, Diego Barberena, Robert J. Lewis-Swan +4
Interactions between atoms and light in optical cavities provide a means of investigating collective (many-body) quantum physics in controlled environments. Such ensembles of atoms…
A cavity-QED protocol for precise field sensing in the optical domain
Robert J. Lewis-Swan, D. Barberena, Juan A. Muniz +4
In the context of quantum metrology, optical cavity-QED platforms have primarily been focused on the generation of entangled atomic spin states useful for next-generation frequency…
Dynamics of quantum information
R. J. Lewis-Swan, A. Safavi-Naini, A. M. Kaufman +1
The ability to harness the dynamics of quantum information and entanglement is necessary for the development of quantum technologies and the study of complex quantum systems. On th…
Engineering spin squeezing in a 3D optical lattice with interacting spin-orbit-coupled fermions
Peiru He, Michael A Perlin, Sean R Muleady +4
One of the most important tasks in modern quantum science is to coherently control and entangle many-body systems, and to subsequently use these systems to realize powerful quantum…
Bang-bang shortcut to adiabaticity in the Dicke model as realized in a Penning trap experiment
J. Cohn, A. Safavi-Naini, R. J. Lewis-Swan +7
We introduce a bang-bang shortcut to adiabaticity for the Dicke model, which we implement via a 2-D array of trapped ions in a Penning trap with a spin-dependent force detuned clos…
Driven-Dissipative Quantum Dynamics in Ultra Long-lived Dipoles in an Optical Cavity
Diego Barberena, Robert J. Lewis-Swan, James K. Thompson +1
We study the quantum dynamics of many-body arrays of two-level atoms in a driven cavity subject to collective decay and interactions mediated by the cavity field. We work in the ba…