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, Applied
Jinlian Hu, Huaqiang Li, Rong Song, Jingxu Bai, Yuechun Jiao, Jianming Zhao, Suotang Jia
Summary: In this study, we demonstrate a continuously tunable electric field measurement based on the far off-resonant AC Stark effect in a Rydberg atomic vapor cell. By mixing an incident weak signal field with a strong far off-resonant field in the Rydberg system, we are able to measure electric fields in the frequency range of 2 to 5 GHz. Our method provides high sensitivity and can be extended to arbitrary frequency measurements.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Multidisciplinary
K. H. Leung, B. Iritani, E. Tiberi, I. Majewska, M. Borkowski, R. Moszynski, T. Zelevinsky
Summary: Neutral quantum absorbers in optical lattices have been used to achieve clocks with high spectroscopic resolution. In this study, a lattice clock based on pure molecular vibration is realized using an ensemble of diatomic molecules. The systematic uncertainties are evaluated, resulting in a total uncertainty of 4.6 x 10-14. This milestone in molecular spectroscopy and THz-frequency standards can be applied to other neutral molecular species for fundamental physics research and the search for new interactions.
Correction
Physics, Multidisciplinary
Ivaylo S. Madjarov, Jacob P. Covey, Adam L. Shaw, Joonhee Choi, Anant Kale, Alexandre Cooper, Hannes Pichler, Vladimir Schkolnik, Jason R. Williams, Manuel Endres
Summary: The paper has been amended and the revised version can be accessed via a link at the top of the paper.
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
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, Applied
Hsuan-Jui Su, Jia-You Liou, I-Chun Lin, Yi-Hsin Chen
Summary: We discuss the interplay between high-contrast Rydberg-state electromagnetically induced transparency (EIT) and optical pumping (OP) in a thermal Rb-87 medium. By pumping the population to one single hyperfine state, we can enhance the interaction strength and amplify the EIT peak. According to the measurements, the EIT peak height can be improved by a factor of two or reduced by one order of magnitude, and linewidth was slightly narrowed by the pumping effect. Our work clarifies the underlying mechanisms of optical pumping, making relevant studies useful in developing Rydberg-based electrometry.
JOURNAL OF APPLIED PHYSICS
(2022)
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
Optics
Bjoern Haase, Mirco Kutas, Felix Riexinger, Patricia Bickert, Andreas Keil, Daniel Molter, Michael Bortz, Georg von Freymann
Summary: This erratum corrects two typing errors in a previously published manuscript, which were limited to theoretical derivation and did not affect numerical calculations, results, or conclusions.
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
Multidisciplinary Sciences
Nicolas Zuber, Viraatt S. V. Anasuri, Moritz Berngruber, Yi-Quan Zou, Florian Meinert, Robert Loew, Tilman Pfau
Summary: Researchers have discovered a new type of molecular ion based on the interaction between the ionic charge and a flipping-induced dipole of a highly excited electron, called Rydberg atom. This molecular ion has a bond length of several micrometres. Using a high-resolution ion microscope, they have measured the vibrational spectrum and spatially resolved the bond length and angular alignment of the molecule. Due to the large bond length, the molecular dynamics are extremely slow.
Article
Optics
Wenle Weng, Miles H. Anderson, Anat Siddharth, Jijun He, Arslan S. Raja, Tobias J. Kippenberg
Summary: This study utilizes Turing rolls in optical Kerr microresonators to extract terahertz frequency signals, achieving low-noise microwave signal synthesis through electro-optic modulation and microcomb. The stabilization of terahertz oscillations to a microwave reference via intracavity power modulation significantly improves fractional frequency instabilities, paving the way for bidirectional terahertz-to-microwave links with hybrid optical-frequency-comb techniques.
Article
Engineering, Electrical & Electronic
Yanchen Zhou, Ruijie Peng, Jinbiao Zhang, Linjie Zhang, Zhenfei Song, Zhigang Feng, Yan Peng
Summary: This paper proposes a method for real-time detection of terahertz electric field using four-level Rydberg atoms, which has a high detection bandwidth and sensitivity. The relationship among the terahertz electric field, excitation energy level, photoelectric field strength, gas temperature, and electromagnetically induced transparency signal is studied in detail through theoretical analysis and formula derivation. The method has a lower noise equivalent power in the range of 0-1 THz compared to the traditional thermal detection system.
IEEE PHOTONICS JOURNAL
(2022)
Article
Physics, Applied
Derek S. Wang, David D. Dai, Prineha Narang
Summary: This article describes how a ladder emitter can be used to implement a tunable quantum logic gate on photonic qubits encoded in the frequency basis. By controlling the interactions between different photons, arbitrary phase control operations can be achieved. This gate is deterministic, does not require active control, and only needs a single ladder emitter, allowing for low-footprint and more efficient decomposition of quantum circuits.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Li-Hua Zhang, Zong-Kai Liu, Bang Liu, Zheng-Yuan Zhang, Guang-Can Guo, Dong-Sheng Ding, Bao-Sen Shi
Summary: The developing frequency-comb spectral technologies have potential applications and prospects in the wide fields of cosmology, meteorology, and microwave measurement. The demonstrated Rydberg microwave-frequency-comb spectrometer provides precise microwave measurement via multiple-microwave field dressing. This experiment enables real-time sensing of unknown microwave signals using Rydberg atoms.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Multidisciplinary
James Klatzow, Jonas N. Becker, Patrick M. Ledingham, Christian Weinzetl, Krzysztof T. Kaczmarek, Dylan J. Saunders, Joshua Nunn, Ian A. Walmsley, Raam Uzdin, Eilon Poem
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Multidisciplinary
S. Gao, O. Lazo-Arjona, B. Brecht, K. T. Kaczmarek, S. E. Thomas, J. Nunn, P. M. Ledingham, D. J. Saunders, I. A. Walmsley
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Multidisciplinary
M. Businger, A. Tiranov, K. T. Kaczmarek, S. Welinski, Z. Zhang, A. Ferrier, P. Goldner, M. Afzelius
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Multidisciplinary
Adrian Holzapfel, Jean Etesse, Krzysztof T. Kaczmarek, Alexey Tiranov, Nicolas Gisin, Mikael Afzelius
NEW JOURNAL OF PHYSICS
(2020)
Article
Quantum Science & Technology
B. Jaderberg, A. Agarwal, K. Leonhardt, M. Kiffner, D. Jaksch
QUANTUM SCIENCE AND TECHNOLOGY
(2020)
Article
Quantum Science & Technology
B. Jaderberg, L. W. Anderson, W. Xie, S. Albanie, M. Kiffner, D. Jaksch
Summary: The resurgence of self-supervised learning offers a scalable solution for handling large datasets without human annotation. This study explores the potential of quantum neural networks (QNNs) in addressing hardware limitations and providing more powerful architectures, demonstrating the advantages of small-scale QNN in visual representation learning and the comparable accuracy of current noisy devices to classical models for image classification on downstream tasks.
QUANTUM SCIENCE AND TECHNOLOGY
(2022)
Article
Optics
T. O. M. A. S. Z. Krehlik, A. R. T. U. R. Stabrawa, R. A. F. A. L. Gartman, Krzysztof T. Kaczmarek, R. O. B. E. R. T. LoeW, A. D. A. M. Wojciechowski
Summary: This study demonstrates the preparation of a specific Zeeman state atomic ensemble using single-beam optical pumping within a hollow-core photonic crystal fiber. Experimental results show a 50% increase in population in the pumped F = 2, mF = 2 Zeeman substate, and depopulation of other Zeeman substates. As a result, the relative population of the mF = 2 substate within the F = 2 manifold improves threefold, with 60% of the F = 2 population residing in the mF = 2 dark sublevel. The study proposes methods to further enhance the pumping efficiency in alkali-filled hollow-core fibers.
Article
Optics
T. Krivachy, K. T. Kaczmarek, M. Afzelius, J. Etesse, G. Haack
Summary: In this study, we propose a four-color scheme to achieve spin squeezing in rare-earth-ion-doped crystals without using an interferometer. Through analytic derivation, we demonstrate the generation of spin squeezing from a microscopic perspective based on the Tavis-Cummings model. We specifically investigate the cases of europium- and praseodymium-doped yttrium orthosilicates.
Article
Computer Science, Interdisciplinary Applications
Nikita Gourianov, Michael Lubasch, Sergey Dolgov, Quincy Y. van den Berg, Hessam Babaee, Peyman Givi, Martin Kiffner, Dieter Jaksch
Summary: Understanding turbulence is crucial for comprehending various natural and technological flow processes. By quantifying correlations between different length scales, inspired by quantum many-body physics, we can analyze the structure of turbulent flows. Through the use of tensor network theory, we have developed a structure-resolving algorithm that accurately simulates turbulent flows with a significantly reduced number of parameters. This quantum-inspired approach opens up possibilities for conducting computational fluid dynamics on quantum computers.
NATURE COMPUTATIONAL SCIENCE
(2022)
Article
Optics
Lewis W. Anderson, Martin Kiffner, Panagiotis Kl. Barkoutsos, Ivano Tavernelli, Jason Crain, Dieter Jaksch
Summary: The study develops a coarse-grained representation of electronic response suitable for determining the ground state of weakly interacting molecules using VQA, demonstrating its capability on IBM superconducting quantum processors and showing potential for probing energies in weakly bound regimes.
Article
Optics
Michael Lubasch, Jaewoo Joo, Pierre Moinier, Martin Kiffner, Dieter Jaksch
Correction
Materials Science, Multidisciplinary
Martin Kiffner, Jonathan R. Coulthard, Frank Schlawin, Arzhang Ardavan, Dieter Jaksch
Article
Optics
Paolo Rosson, Michael Lubasch, Martin Kiffner, Dieter Jaksch
Article
Optics
Thibault Vogt, Christian Gross, Jingshan Han, Sambit B. Pal, Mark Lam, Martin Kiffner, Wenhui Li
Article
Materials Science, Multidisciplinary
Martin Kiffner, Jonathan R. Coulthard, Frank Schlawin, Arzhang Ardavan, Dieter Jaksch
