Article
Chemistry, Physical
R. Wang, J. Sous, M. Aghigh, K. L. Marroquin, K. M. Grant, F. B. V. Martins, J. S. Keller, E. R. Grant
Summary: Out-of-equilibrium, strong correlation in a many-body system can trigger emergent properties that act to constrain the natural dissipation of energy and matter. This study focuses on the initial stages of avalanche and quench in a state-selected Rydberg gas to characterize intermolecular interaction dynamics using mm-wave spectroscopy.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Optics
Donghao Li, Guoqi Bian, Jie Miao, Pengjun Wang, Zengming Meng, Liangchao Chen, Lianghui Huang, Jing Zhang
Summary: The study reports the measurement of the Rydberg excitation spectrum in ultra-cold (40K) Fermi gases through a two-photon process. Two methods were employed, one to reduce atomic losses using electromagnetically induced transparency, and the other to enhance losses through spontaneous avalanche ionization due to strong Rydberg-Rydberg interactions. The highest detectable Rydberg states were limited to n <= 62 due to competition between the long Rydberg blockade effective range and limited atomic cloud size.
Article
Physics, Multidisciplinary
C. J. Turner, J-Y Desaules, K. Bull, Z. Papic
Summary: The text explains key concepts and findings in the theory of quantum scarring, demonstrating that quasimodes arise from previously established periodic orbits when quantum fluctuations are restored. The results shed light on the role of the TDVP classical system in Rydberg atom chains and its impact on the system.
Article
Multidisciplinary Sciences
Loic Anderegg, Sean Burchesky, Yicheng Bao, Scarlett S. Yu, Tijs Karman, Eunmi Chae, Kang-Kuen Ni, Wolfgang Ketterle, John M. Doyle
Summary: This study demonstrates the use of microwave radiation to engineer and control interaction potentials between ultracold calcium monofluoride molecules, resulting in an effective repulsive shield that suppresses inelastic loss rate by a factor of six. The findings provide a general route for creating long-lived, dense samples of ultracold polar molecules and implementing evaporative cooling techniques.
Article
Physics, Multidisciplinary
Ian Stevenson, Aden Z. Lam, Niccolo Bigagli, Claire Warner, Weijun Yuan, Siwei Zhang, Sebastian Will
Summary: We successfully create bosonic NaCs molecules in their absolute rovibrational ground state using stimulated Raman adiabatic passage. We generate ultracold gases with up to 22,000 dipolar NaCs molecules at a temperature of 300(50) nK and a peak density of 1.0(4) x 1012 cm-3. By preparing the molecules in specific quantum states, including electronic, vibrational, rotational, and hyperfine states, we achieve comprehensive quantum state control. We also measure various properties, such as the ground state ac polarizability and the two-body loss rate, and demonstrate strong microwave coupling between rotational states.
PHYSICAL REVIEW LETTERS
(2023)
Article
Optics
Yuechun Jiao, Liping Hao, Jingxu Bai, Jiabei Fan, Zhengyang Bai, Weibin Li, Jianming Zhao, Suotang Jia
Summary: In this experiment, we study the Rydberg electromagnetically induced transparency (EIT) of a cascade three-level atom involving the 80D(5/2) state in a strong interaction regime using a cesium ultracold cloud. We observe a slow decrease in EIT transmission over time at two-photon resonance, indicating interaction-induced metastability. The dephasing rate is found to have a nonlinear dependence on the incident photon number. The main dephasing mechanism is attributed to strong dipole-dipole interactions and state transfer to other Rydberg states.
Article
Optics
Guoqi Bian, Biao Shan, Lianghui Huang, Jing Zhang
Summary: This study reports the measurement of electromagnetically induced transparency (EIT) using Rydberg states in ultracold Fermi gases. By studying the line shapes and peak position shift of Rydberg-EIT, we demonstrate significant changes and interaction behaviors of Rydberg states.
CHINESE OPTICS LETTERS
(2023)
Article
Physics, Multidisciplinary
S. Jurgilas, A. Chakraborty, C. J. H. Rich, L. Caldwell, H. J. Williams, N. J. Fitch, B. E. Sauer, Matthew D. Frye, Jeremy M. Hutson, M. R. Tarbutt
Summary: In this study, mixtures of ultracold CaF molecules and Rb atoms were prepared in a magnetic trap for analyzing their inelastic collisions. The results indicate that the nature of collisions varies depending on the rotational states of the molecules involved.
PHYSICAL REVIEW LETTERS
(2021)
Article
Quantum Science & Technology
Kenneth Wang, Conner P. Williams, Lewis R. B. Picard, Norman Y. Yao, Kang-Kuen Ni
Summary: This study presents a quantum information architecture utilizing an array of optically trapped molecules and atoms. By taking advantage of the large transition dipole moments of Rydberg atoms, fast and high-fidelity gates between qubits encoded in coherent molecular degrees of freedom can be achieved. The paper discusses potential error channels and also explores the possibility of nondestructive molecule detection and rotational state readout through the molecule-Rydberg interaction.
Article
Physics, Multidisciplinary
Liping Hao, Zhengyang Bai, Jingxu Bai, Suying Bai, Yuechun Jiao, Guoxiang Huang, Jianming Zhao, Weibin Li, Suotang Jia
Summary: An ensemble of excited atoms can synchronize emission of light collectively in a process known as superradiance, which is strongly influenced by the surrounding electromagnetic fields. Enhanced by microwave photons from blackbody radiation, superradiance of Rydberg atoms is observed and studied, providing insights into collective photon-atom interactions and potential applications in blackbody thermometry.
NEW JOURNAL OF PHYSICS
(2021)
Article
Multidisciplinary Sciences
Lysander Christakis, Jason S. Rosenberg, Ravin Raj, Sungjae Chi, Alan Morningstar, David A. Huse, Zoe Z. Yan, Waseem S. Bakr
Summary: Synthetic quantum systems with interacting constituents are important for quantum information processing and explaining fundamental phenomena. Ultracold polar molecules offer a promising platform due to their long coherence times and long-range, anisotropic interactions. Using quantum gas microscopy, we study the dynamic correlations of polar molecules in a two-dimensional optical lattice, exploring different interaction scenarios and pushing the frontier of probing and controlling interacting systems of ultracold molecules.
Article
Optics
A. Duspayev, G. Raithel
Summary: This study investigates the decay of Rydberg-atom-ion molecules (RAIMs) caused by nonadiabatic couplings between electronic potential-energy surfaces. Using the Born-Huang representation and numerical simulations, the nonadiabatic lifetimes of rubidium RAIMs for different vibrational states and principal quantum numbers are calculated. The results show that the nonadiabatic lifetimes generally exceed the radiative lifetimes of Rydberg atoms, and this trend is explained by quantum interference from a shallow potential well in an inner potential surface.
Article
Optics
Cheng Chen, Fan Yang, Xiaoling Wu, Chuyang Shen, Meng Khoon Tey, Li You
Summary: The experimental observation of strong two-color optical nonlinearity in an ultracold gas of Rb-85 - Rb-87 atom mixture is reported. The nonlinearity can be tuned by varying the density ratio of different atomic isotopes, demonstrating potential for exploring strongly interacting multicomponent fluids of light. The phenomenon is described by two coupled nonlinear wave equations developed to explain the cross-absorption modulation to the beam propagation dynamics.
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)
Article
Physics, Multidisciplinary
Rosario Gonzalez-Ferez, Janine Shertzer, H. R. Sadeghpour
Summary: It is predicted that ultralong-range Rydberg bimolecules will form in collisions between polar molecules in cold and ultracold settings, with high energy and permanent electric dipole moments. The Rydberg bimolecules have rotational constants in the MHz range, allowing for microwave spectroscopy and achieving considerable orientation. These molecules hold promise for studying a special class of long-range bimolecular interactions.
PHYSICAL REVIEW LETTERS
(2021)
