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
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
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
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
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
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
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
Ri-Hua Zheng, Yang Xiao, S-L Su, Ye-Hong Chen, Zhi-Cheng Shi, Jie Song, Yan Xia, Shi-Biao Zheng
Summary: The proposed scheme prepares a steady KLM state between a pair of Rydberg atoms efficiently by dissipation, showing high fidelity in state conversion and reduced preparation time. It effectively suppresses dephasing errors caused by interatomic distance fluctuations, making it a topic of interest for further experimental investigation in dissipation dynamics based on Rydberg atoms.
Article
Optics
Chang-Xiao Li, Sheng Yang, Jing-Bo Xu
Summary: This study investigates the multipartite entanglement and quantum criticality of neutral atoms on a two-dimensional square lattice interacting via laser excitation. The research demonstrates that there are peaks in the first derivative of residual entanglement near the critical point, and the critical behaviors obey conventional finite-sized scaling. A sharp peak in the fidelity susceptibility near the critical point is also observed, with the critical exponent of the associated correlation length determined through finite size analysis.
Article
Physics, Multidisciplinary
Michael Peper, Johannes Deiglmayr
Summary: In this study, homonuclear Cs-2, K-2, and heteronuclear CsK long-range Rydberg molecules were formed in a dual-species magneto-optical trap for K-39 and Cs-133 by one-photon UV photoassociation. The different ground-state-density dependence of homo- and heteronuclear photoassociation rates and the detection of stable molecular ions provided clarification. Bound-bound millimeter-wave spectroscopy of long-range Rydberg molecules was utilized to access molecular states not accessible by one-photon photoassociation, serving as a benchmark for the development of theoretical models.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Luis S. Yague Bosch, Tim Ehret, Francesco Petiziol, Ennio Arimondo, Sandro Wimberger
Summary: A shortcut-to-adiabatic protocol is developed for the fast and high-fidelity realization of a controlled-phase gate in Rydberg atoms. It accelerates the adiabatic state transfer by compensating nonadiabatic transitions with oscillating fields, resulting in high fidelities and fast operation times. The impact of gate fidelity on the efficiency of a minimal quantum-error correction circuit is also analyzed.
ANNALEN DER PHYSIK
(2023)
Article
Physics, Applied
Peter K. Elgee, Joshua C. Hill, Kermit-James E. LeBlanc, Gabriel D. Ko, Paul D. Kunz, David H. Meyer, Kevin C. Cox
Summary: Rydberg electric field sensors provide sensitivity over a broad range of the electromagnetic spectrum but lack sensitivity in the ultra-high frequency and below bands. This study presents a resonant Rydberg electric field sensor operating in the UHF band using a dual-optical dual-microwave spectroscopy scheme, which improves the sensitivity in this range. The effectiveness of the sensing scheme is demonstrated by measuring Sirius XM satellite radio outside the laboratory.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Multidisciplinary
Hao-Kun Li, Erik Urban, Crystal Noel, Alexander Chuang, Yang Xia, Anthony Ransford, Boerge Hemmerling, Yuan Wang, Tongcang Li, Hartmut Haffner, Xiang Zhang
PHYSICAL REVIEW LETTERS
(2017)
Article
Multidisciplinary Sciences
A. Abdelrahman, O. Khosravani, M. Gessner, A. Buchleitner, H. -P. Breuer, D. Gorman, R. Masuda, T. Pruttivarasin, M. Ramm, P. Schindler, H. Haeffner
NATURE COMMUNICATIONS
(2017)
Article
Instruments & Instrumentation
Da An, Clemens Matthiesen, Ahmed Abdelrahman, Maya Berlin-Udi, Dylan Gorman, Sonke Moller, Erik Urban, Hartmut Haffner
REVIEW OF SCIENTIFIC INSTRUMENTS
(2018)
Article
Physics, Multidisciplinary
Eli Megidish, Joseph Broz, Nicole Greene, Hartmut Haffner
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Multidisciplinary
Clemens Matthiesen, Qian Yu, Jinen Guo, Alberto M. Alonso, Hartmut Haffner
Summary: In this study, trapping of electrons in a millimeter-sized quadrupole Paul trap driven at 1.6 GHz in a room-temperature ultrahigh vacuum setup was demonstrated. Cold electrons were introduced into the trap by ionization of atomic calcium via Rydberg states and were confined by microwave and static electric fields for several tens of milliseconds. Some electrons remained trapped longer, showing no measurable loss for measurement times up to a second. Operating a similar electron Paul trap in a cryogenic environment may offer a platform for all-electric quantum computing with trapped electron spin qubits.
Article
Quantum Science & Technology
Ryan Shaffer, Eli Megidish, Joseph Broz, Wei-Ting Chen, Hartmut Haffner
Summary: Analog quantum simulation is expected to be a significant application of near-term quantum devices, and verifying these devices without relying on known simulation results is important as system sizes grow. Experimentally-driven verification protocols for analog quantum simulators are discussed for their sensitivity to error sources and scalability to larger system sizes. These protocols were demonstrated experimentally using a two-qubit trapped-ion analog quantum simulator and numerically using models of up to five qubits.
NPJ QUANTUM INFORMATION
(2021)
Review
Nanoscience & Nanotechnology
Kenneth R. Brown, John Chiaverini, Jeremy M. Sage, Hartmut Haffner
Summary: Trapped-ion qubits show great potential for quantum computation, but materials improvements are necessary to enhance performance. Materials research is needed to design traps that allow for improved performance and to minimize the ubiquitous electric-field noise produced by trap-electrode surfaces. Collaboration between materials scientists and trapped-ion technologists is essential to develop materials-based integration and noise-mitigation strategies for the next generation of trapped-ion quantum computers.
NATURE REVIEWS MATERIALS
(2021)
Article
Physics, Multidisciplinary
Daniel Carney, Hartmut Haffner, David C. Moore, Jacob M. Taylor
Summary: Electrons and ions trapped with electromagnetic fields, traditionally used as high-precision metrological instruments and quantum information processing platforms, can also serve as highly sensitive detectors for passing charged particles due to their extreme charge-to-mass ratio and low-noise quantum readout and control capabilities. These systems can detect energy depositions many orders of magnitude below typical ionization scales, showcasing potential applications in particle physics and noise characterization in quantum computers.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Da An, Alberto M. Alonso, Clemens Matthiesen, Hartmut Haffner
Summary: This study demonstrates the coupling between the motions of two independently trapped ions using a room-temperature metallic wire. The ion-ion interaction is enhanced, but quantum-coherent coupling is hindered by strong surface electric-field noise.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Joseph Broz, Bingran You, Sumanta Khan, Hartmut Haeffner, David E. Kaplan, Surjeet Rajendran
Summary: Quantum mechanics requires the time evolution of the wave function to be linear. A consistent causal nonlinear theory has been recently developed. Existing experimental tests for nonlinearities are rendered inapplicable due to the sensitivity of this theory to the full physical spread of the wave function. By using controlled motional superpositions of a trapped ion, we set a stringent limit of 5.4 x 10-12 on the magnitude of the unitless scaling factor epsilon similar to gamma for the predicted causal nonlinear perturbation.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Maya Berlin-Udi, Clemens Matthiesen, P. N. Thomas Lloyd, Alberto M. Alonso, Crystal Noel, Benjamin Saarel, Christine A. Orme, Chang-Eun Kim, Art J. Nelson, Keith G. Ray, Vincenzo Lordi, Hartmut Haffner
Summary: The aim of our study is to understand how the microscopic properties of a metal surface affect its electric field noise characteristics. We conducted a series of experiments involving heating, milling, and electron treatments on a single surface ion trap to investigate the thermal transformation process. Using Ca-40(+) ions as detectors, we monitored the electric field noise at frequencies close to 1 MHz and tracked changes in the composition of the contaminated metal surface using an Auger spectrometer.
Article
Optics
Qian Yu, Alberto M. Alonso, Jackie Caminiti, Kristin M. Beck, R. Tyler Sutherland, Dietrich Leibfried, Kayla J. Rodriguez, Madhav Dhital, Boerge Hemmerling, Hartmut Haffner
Summary: We investigate the feasibility of using electrons in a linear Paul trap as qubits in a future quantum computer. Through a concrete design proposal, we discuss the necessary experimental steps and conduct numerical simulations to evaluate the performance of such a device.
Article
Optics
Sara L. Mouradian, Neil Glikin, Eli Megidish, Kai-Isaak Ellers, Hartmut Haeffner
Summary: The study reveals that increasing the number of sensors can enhance sensitivity for continuous signals, but more sensors are required to achieve the same sensitivity for intermittent signals. The importance of control fidelity and readout at the quantum projection noise limit is demonstrated.
Article
Optics
Da An, Clemens Matthiesen, Erik Urban, Hartmut Haeffner
Article
Optics
Pai Peng, Clemens Matthiesen, Hartmut Haffner
