Article
Physics, Multidisciplinary
Andrea Muni, Lea Lachaud, Angelo Couto, Michel Pokier, Raul Celistrino Teixeira, Jean-Michel Raimond, Michel Brune, Sebastien Gleyzes
Summary: This study demonstrates how to manipulate circular Rydberg states using the electrostatic coupling of strontium's valence electrons. It also shows the application of this coupling in non-destructive detection and the realization of a hybrid optical-microwave platform for quantum technology.
Article
Physics, Multidisciplinary
Andrea Muni, Lea Lachaud, Angelo Couto, Michel Poirier, Raul Celistrino Teixeira, Jean-Michel Raimond, Michel Brune, Sebastien Gleyzes
Summary: This study demonstrates the coherent manipulation of circular Rydberg states using the electrostatic coupling between the two valence electrons of strontium and optical pulses. The state of the Rydberg electron can be mapped onto the ionic core, enabling non-destructive detection of circular states and the realization of a hybrid optical-microwave platform for quantum technology.
Article
Optics
Chi-En Wu, Teodora Kirova, Marcis Auzins, Yi-Hsin Chen
Summary: In this theoretical study, the enhancement of the Rydberg blockade radius using Forster resonance is presented. The investigation reveals that significant differences in the principal quantum numbers of two Rydberg states can substantially improve the blockade radius, exceeding 50 μm.
Article
Physics, Multidisciplinary
Y. Mei, Y. Li, H. Nguyen, P. R. Berman, A. Kuzmich
Summary: Researchers have created a special two-level system in an ensemble of several hundred atoms and observed oscillations between the ground state and collective Rydberg state. They have also obtained the light shifts of the qubits using interference techniques and derived an effective two-level model that agrees well with their observations.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Frederic Hummel, Matthew T. Eiles, Peter Schmelcher
Summary: This study observed a series of conical intersections in the potential energy curves governing both the collision between a Rydberg atom and a ground-state atom and the structure of Rydberg molecules. By using the electronic energy of the Rydberg atom as a synthetic dimension, the von Neumann-Wigner theorem was circumvented. These conical intersections can occur when certain conditions are met, and have a significant impact on the rate of ultracold l-changing collisions.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Jiabei Fan, Hanxiao Zhang, Yuechun Jiao, Changcheng Li, Jingxu Bai, Jinhui Wu, Jianming Zhao, Suotang Jia
Summary: We demonstrate the coherent microwave manipulation of a single optical photon by utilizing a single Rydberg excitation in an atomic ensemble. The strong nonlinearities in a Rydberg blockade region allow for the storage of a single photon in the form of a Rydberg polariton using electromagnetically induced transparency (EIT). By applying a microwave field, the stored single photon can be manipulated, while coherent readout is achieved by mapping the excitation into a single photon. Our experimental observations are well explained by numerical simulations based on an improved superatom model, and this work is significant for the development of quantum technologies.
Article
Physics, Multidisciplinary
Nayan E. Myerson-Jain, Stephen Yan, David Weld, Cenke Xu
Summary: We propose the construction of a many-body phase of matter with fractal structure using arrays of Rydberg atoms, where the degenerate low energy excited states form a self-similar fractal structure. By leveraging van der Waals interaction and experimental tunability of Rydberg-based platforms, we successfully simulate exotic phases of matter with fractal structures and study a quantum phase transition involving a fractal ordered phase.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
S. Rammohan, A. K. Chauhan, R. Nath, A. Eisfeld, S. Wuester
Summary: Experiments have shown that excitation of atoms to Rydberg states in a Bose-Einstein condensate leads to phonon creation, and a theoretical basis for describing phonon-induced decoherence of different Rydberg states superposition is provided. Rydberg-phonon coupling coefficients are determined using analytical and numerical techniques, and bath correlation functions, spectral densities, and reorganization energies are calculated from these coefficients, serving as essential inputs for future open quantum system approaches. Bath correlations scale with principal quantum number nu(-6) and reorganization energies scale exponentially, demonstrating the extreme tunability of Rydberg atomic properties.
Article
Physics, Multidisciplinary
S. Y. Buhmann, S. M. Giesen, M. Diekmann, R. Berger, S. Aull, P. Zahariev, M. Debatin, K. Singer
Summary: A quantum sensing protocol is proposed to demonstrate the motion-induced chirality of circularly polarised Rydberg atoms by using a bichromatic light field to dress a cloud of Rydberg atoms. The system becomes chiral by combining a circularly polarised dipole transition in the Rydberg atom with atomic centre-of-mass motion. The discriminatory chiral energy shifts induced by a chiral mirror are estimated using a macroscopic quantum electrodynamics approach, and the protocol will also provide indirect evidence for Casimir-Polder quantum friction.
NEW JOURNAL OF PHYSICS
(2021)
Article
Quantum Science & Technology
Andreas Kruckenhauser, Rick van Bijnen, Torsten Zache, Marco Di Liberto, Peter Zoller
Summary: In this study, a toolbox for manipulating arrays of high-dimensional hydrogen-like Rydberg atoms is developed. The researchers utilize the SO(4) symmetry to characterize the effects of various fields on the well-structured manifolds of these states. They also construct generalized large-spin Heisenberg models and demonstrate their applications in quantum simulation and quantum information processing.
QUANTUM SCIENCE AND TECHNOLOGY
(2023)
Article
Optics
Annika Tebben, Clement Hainaut, Andre Salzinger, Sebastian Geier, Titus Franz, Thomas Pohl, Martin Garttner, Gerhard Zurn, Matthias Weidemuller
Summary: Experimental investigation of the nonlinear transmission spectrum of coherent light fields through a Rydberg EIT medium reveals significant differences on two-photon resonance and exposes deficiencies in mean-field models and rate-equation simulations. A more complete understanding of Rydberg EIT and emerging photon interactions necessitates moving beyond existing simplified models and few-photon theories.
Article
Physics, Applied
Yangyang Liu, Yuan Sun, Zhuo Fu, Peng Xu, Xin Wang, Xiaodong He, Jin Wang, Mingsheng Zhan
Summary: This study investigates the coherence of ground-Rydberg transitions in a single atom subjected to various pulse sequences, particularly focusing on the CZ gate sequence. It is found that the process experienced by the control qubit atom under a two-qubit entangling process with the H-CZ controlled-NOT gate scheme is essentially similar to ground-Rydberg Ramsey interference. A theoretical model linking the decoherence time of the control qubit to the CZ pulse sequence is established, shedding light on the origins of decoherence effects and potential ways to improve fidelity of the CZ gate.
PHYSICAL REVIEW APPLIED
(2021)
Article
Quantum Science & Technology
G. Pelegri, A. J. Daley, J. D. Pritchard
Summary: The study proposes a protocol for implementing high-fidelity multiqubit controlled phase gates on neutral atom qubits. The results show that high-fidelity quantum gates can be achieved in a relatively short time period using this protocol. This has potential implications and applications for future developments.
QUANTUM SCIENCE AND TECHNOLOGY
(2022)
Article
Optics
SongPo Xu, MingQing Liu, Wei Quan, XiaoPeng Yi, ShiLin Hu, LiBin Zheng, ZhiQiang Wang, Meng Zhao, ShaoGang Yu, RenPing Sun, YanLan Wang, LinQiang Hua, XuanYang Lai, Wilhelm Becker, Jing Chen, XiaoJun Liu
Summary: S-matrix theory and the Born expansion, particularly the second-order term, provide an effective theory for understanding atomic and molecular processes in intense laser fields. The convergence problem of the Born series arises when dealing with long-range potentials such as the Coulomb potential. By conducting experiments and simulations on an argon atom subjected to a strong laser field, we demonstrate that the second-order term of the S-matrix expansion can accurately reproduce the observed phenomena, while the lowest-order term cannot.
Article
Physics, Multidisciplinary
Dong-Sheng Ding, Zong-Kai Liu, Bao-Sen Shi, Guang-Can Guo, Klaus Molmer, Charles S. Adams
Summary: This research demonstrates the enhanced sensitivity of many-body critical systems to small variations in external parameters in a non-equilibrium Rydberg atomic gas. By quantifying the Fisher information, it is shown that many-body effects lead to a three orders of magnitude increase in sensitivity compared to single-particle systems.
