Article
Physics, Multidisciplinary
M. Moreno-Cardoner, D. Goncalves, D. E. Chang
Summary: The proposed system combines subwavelength, two-dimensional atomic arrays and Rydberg interactions to achieve strong, coherent interactions between individual photons with high fidelity. The system has significant advantages in optical response and error scaling, enabling a coherent photon-photon gate or switch.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
D. P. Ornelas-Huerta, Przemyslaw Bienias, Alexander N. Craddock, Michael J. Gullans, Andrew J. Hachtel, Marcin Kalinowski, Mary E. Lyon, Alexey Gorshkov, S. L. Rolston, J. Porto
Summary: Long-range Rydberg interactions combined with EIT can produce strongly interacting photons with tunable and controllable strength, sign, and form of the interactions, allowing for the generation of novel few-photon states. It has been shown that in the Rydberg-EIT system, three-body interactions can be as strong or stronger than two-body interactions. The observed features in the outgoing photonic correlations are strongly suggested to be caused by the resonant enhancement of three-body losses based on numerical simulations and analytical estimates.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Giuliano Giudici, Mikhail D. Lukin, Hannes Pichler
Summary: Recent experiments demonstrate the onset of a topological spin liquid using a programmable quantum simulator based on Rydberg atom arrays. By preparing out-of-equilibrium states using a quasiadiabatic state preparation protocol, robust signatures of topological order emerge. The state preparation protocol can be optimized to target the fixed point of the topological phase, and a two-parameter variational manifold of tensor network states accurately describes the many-body dynamics of the preparation process.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
D. Bluvstein, A. Omran, H. Levine, A. Keesling, G. Semeghini, S. Ebadi, T. T. Wang, A. A. Michailidis, N. Maskara, W. W. Ho, S. Choi, M. Serbyn, M. Greiner, V. Vuletic, M. D. Lukin
Summary: The study demonstrates that coherent revivals associated with quantum many-body scars can be stabilized by periodic driving, generating a robust subharmonic response akin to discrete timecrystalline order. This finding provides new ways to control complex dynamics in many-body systems and may have potential applications in quantum information science.
Article
Physics, Multidisciplinary
Julien Vaneecloo, Sebastien Garcia, Alexei Ourjoumtsev
Summary: We demonstrate a new versatile building block for optical quantum technologies, combining cavity quantum electrodynamics and interacting atomic ensembles to achieve deterministic quantum engineering of light.
Article
Optics
Rohan Srikumar, Frederic Hummel, Peter Schmelcher
Summary: In this study, we investigate the nonadiabatic interaction effects between the d state and the trilobite state of Na-23, and find significant differences in comparison to the adiabatic Born-Oppenheimer approximation. The resulting spectrum exhibits above-threshold resonant states without adiabatic counterparts, and a rearrangement of the spectral structure as well as the localization of the eigenstates. Our study suggests the use of Na-23 ULRMs as a probe to explore vibronic interaction effects on exaggerated timescales and length scales.
Article
Physics, Multidisciplinary
Bongjune Kim, Ko-Tang Chen, Shih-Si Hsiao, Sheng-Yang Wang, Kai-Bo Li, Julius Ruseckas, Gediminas Juzeliunas, Teodora Kirova, Marcis Auzinsh, Ying-Cheng Chen, Yong-Fan Chen, Ite A. Yu
Summary: This study proposed a method of utilizing the cooling effect in a system of Rydberg polaritons under weak interaction, and observed a series of interesting phenomena, providing a feasible platform for polariton Bose-Einstein condensation.
COMMUNICATIONS PHYSICS
(2021)
Article
Physics, Multidisciplinary
Rhine Samajdar, Darshan G. Joshi, Yanting Teng, Subir Sachdev
Summary: Strongly interacting arrays of Rydberg atoms provide versatile platforms for exploring exotic many-body phases and dynamics of correlated quantum systems. Motivated by recent experimental advances, we show that the combination of Rydberg interactions and appropriate lattice geometries naturally leads to emergent Z(2) gauge theories endowed with matter fields. We also discuss the natures of the fractionalized excitations of these Z(2) spin liquid states using both fermionic and bosonic parton theories and illustrate their rich interplay with proximate solid phases.
PHYSICAL REVIEW LETTERS
(2023)
Article
Quantum Science & Technology
Jacob Taylor, Sumit Goswami, Valentin Walther, Michael Spanner, Christoph Simon, Khabat Heshami
Summary: This study demonstrates the feasibility of using a mesoscopic array of excitons to simulate quantum many-body dynamics by studying the Rydberg excitation dynamics. We show that the Z(2)-ordered phase can be reached by optimizing the physical parameters available, such as those for cuprous oxide (Cu2O), in terms of driving laser parameters. An application example of using this proposed system to solve the maximum independent set problem based on the Rydberg blockade effect is also studied.
QUANTUM SCIENCE AND TECHNOLOGY
(2022)
Article
Astronomy & Astrophysics
Zewei Xiong
Summary: Collective neutrino oscillations are important for determining the neutrino flavor content in core-collapse supernovae or compact binary merger remnants. This study examines the challenging many-body problem using a setup that allows for exact solutions for a large number of neutrinos. The results show that deviations from mean-field evolution can occur even in large systems, and the mechanism of many-body decoherence in flavor space is analyzed.
Article
Physics, Multidisciplinary
V. Bharti, S. Sugawa, M. Mizoguchi, M. Kunimi, Y. Zhang, S. de Leseleuc, T. Tomita, T. Franz, M. Weidemueller, K. Ohmori
Summary: This study reports the observation and control of ultrafast many-body dynamics of electrons in ultracold Rydberg-excited atoms. The emergence of many-body correlations and the crucial role of quantum fluctuations in the observed dynamics are deduced from time-domain Ramsey interferometry in the picosecond timescale.
PHYSICAL REVIEW LETTERS
(2023)
Review
Physics, Multidisciplinary
Zheng-Yuan Zhang, Dong-Sheng Ding, Bao-Sen Shi
Summary: This paper reviews various quantum simulations based on Rydberg many-body systems, including quantum Ising models, XY models, SSH models, and critical self-organized behaviors. Rydberg atoms' strong dipole-dipole interactions and easily manipulable neutral atoms make them ideal for implementing quantum simulations. Challenges and promising directions of quantum simulations using Rydberg many-body systems are also discussed.
Article
Physics, Multidisciplinary
Markus Hiekkamaki, Robert Fickler
Summary: Two-photon interference in multiple transverse-spatial modes along a single beam-path was studied, with observations of coalescence and anticoalescence in different spatial-mode multiports. This operation within spatial modes along a single beam path eliminates the need for interferometric stability and presents new pathways for implementing complex quantum information tasks using linear optical networks.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Keita Omiya, Markus Muller
Summary: We study the nature of the ergodicity-breaking quantum many-body scar states in the PXP model and reveal a common structure that gives rise to these states. We provide an extension of the PXP model that can host exact quantum scars and show that existing scar-stabilizing extensions can be understood within this framework. The exact scar states are obtained as large spin states of explicitly constructed pseudospins, and the quasiperiodic motion is shown to be the projection of the large pseudospin's precession onto the Rydberg-constrained subspace.
Article
Physics, Multidisciplinary
Michael P. Zaletel, Adam Kaufman, Dan M. Stamper-Kurn, Norman Y. Yao
Summary: The study introduces a method to prepare low-entropy many-body states in isolated quantum optical systems by using conformal cooling quenches. It involves transferring entropy between different regions of the system by spatially modulating the effective Hamiltonian. Research findings suggest that even moderately sized bath regions can remove sufficient energy and entropy density to reveal coherent low-temperature physics.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Filippo M. Gambetta, Chi Zhang, Markus Hennrich, Igor Lesanovsky, Weibin Li
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Multidisciplinary
Edward Gillman, Federico Carollo, Igor Lesanovsky
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Multidisciplinary
Federico Carollo, Kay Brandner, Igor Lesanovsky
PHYSICAL REVIEW LETTERS
(2020)
Article
Optics
G. Buonaiuto, I Lesanovsky, B. Olmos
Summary: In this theoretical investigation, we studied the feedback control of a laser-driven one-dimensional atomic chain interfaced with a nanofiber. By measuring guided light through photon counting or homodyne detection, the system's statistics can be controlled. The feedback scheme allows enhancement of photon counting rate and fluctuations, and alteration of the many-body state of the atom chain, providing insights on dynamics in light-matter networks with experimental setups.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Physics, Multidisciplinary
Giuseppe Buonaiuto, Federico Carollo, Beatriz Olmos, Igor Lesanovsky
Summary: This study investigates the creation and control of emergent collective behavior and quantum correlations using feedback in an emitter-waveguide system. It shows the emergence of a time-crystal phase and the control of many-body quantum correlations through feedback strength. The largely analytical results quantify spin squeezing and fluctuations, revealing critical scaling close to the transition to the time crystal.
PHYSICAL REVIEW LETTERS
(2021)
Article
Quantum Science & Technology
Ciaran McDonnell, Beatriz Olmos
Summary: This article analyzes the topological and dynamical properties of a system formed by two chains of identical emitters coupled to a waveguide. It is found that in the single excitation limit, the bulk topological properties of the system are equivalent to a one-dimensional Su-Schrieffer-Heeger (SSH) model. However, the long-range exchange interactions weaken the bulk-boundary correspondence. Interestingly, parameter regimes are identified where fully localized edge states exist independently of the system size, and these states are robust and subradiant in the presence of positional disorder and dissipation processes.
Article
Physics, Multidisciplinary
Chris Nill, Kay Brandner, Beatriz Olmos, Federico Carollo, Igor Lesanovsky
Summary: When atoms are excited to high-lying Rydberg states, their interactions with dipolar forces play a significant role. These interactions not only affect the dissipative effects caused by the coupling of Rydberg atoms with the surrounding electromagnetic field, but also modify the frequency of emitted photons, making it dependent on the local neighborhood of the emitting atom. The interactions among Rydberg atoms accelerate decoherence and affect dissipative phase transitions.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Elmer Suarez, Federico Carollo, Igor Lesanovsky, Beatriz Olmos, Philippe W. Courteille, Sebastian Slama
Summary: We investigate the collective coupling between atoms and an optical cavity mode with multilevel ground-state manifolds experimentally and theoretically. The cavity field optically pumps populations among the ground states in our setup. The resulting dynamics can be described conveniently by an effective dynamical atom-cavity coupling strength that relies on the occupation of individual states and their coupling strengths with the cavity mode. This leads to a nonexponential relaxation dynamics due to the dynamical backaction of the atomic populations on the atom-cavity coupling strength. We experimentally observe this effect with laser-cooled 87Rb atoms and monitor the collective normal-mode splitting in real time. Our results demonstrate that the multilevel structure of electronic ground states can significantly alter the relaxation behavior in atom-cavity setups compared to ensembles of two-level atoms.
Article
Optics
B. Olmos, C. Liedl, I Lesanovsky, P. Schneeweiss
Summary: The research investigates light scattering from an array of atoms into the guided modes of a waveguide, finding an enhanced scattering phenomenon and a modified Bragg condition. Different parameter regimes are identified for the scattering rate dependence on the atom number, and the findings are shown to be independent of the asymmetry of the atom-light coupling.
Article
Physics, Multidisciplinary
Dario Cilluffo, Giuseppe Buonaiuto, Salvatore Lorenzo, G. Massimo Palma, Francesco Ciccarello, Federico Carollo, Igor Lesanovsky
PHYSICAL REVIEW RESEARCH
(2020)
Article
Physics, Fluids & Plasmas
Luke Causer, Igor Lesanovsky, Mari Carmen Banuls, Juan P. Garrahan
Article
Optics
B. Olmos, G. Buonaiuto, P. Schneeweiss, I Lesanovsky
Article
Physics, Multidisciplinary
Michele Burrello, Igor Lesanovsky, Andrea Trombettoni
PHYSICAL REVIEW RESEARCH
(2020)
