Article
Optics
Jun He, Qiang Liu, Ze Yang, Qiqi Niu, Xiaojuan Ban, Junmin Wang
Summary: The phase noise of incident light fields can be converted into amplitude noise through absorption and dispersion effects in media under electromagnetically induced transparency, sensitive to two-photon detuning. This effect can be utilized for a different type of Rydberg spectroscopy. Experimental measurements of the phase noise spectrum (PNS) with Rydberg atoms in a cesium vapor cell have been presented, along with the proposal and demonstration of a modulation-enhanced PNS approach for microwave field measurements.
Article
Physics, Applied
C. T. Fancher, K. L. Nicolich, K. M. Backes, N. Malvania, K. Cox, D. H. Meyer, P. D. Kunz, J. C. Hill, W. Holland, B. L. Schmittberger Marlow
Summary: A laser frequency stabilization technique is proposed for exciting non-ground state atomic transitions in order to reduce the size, weight, power, and cost requirements of quantum sensing devices. This technique overcomes the challenges posed by large optical cavities and high optical power usage for frequency stabilization, requiring only minimal additional electronics. Experimental results show that Rydberg electric field sensors using this technique can collect data while sacrificing only 0.1% of available bandwidth for frequency stabilization up to 900 Hz.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Multidisciplinary
Kritsana Srakaew, Pascal Weckesser, Simon Hollerith, David Wei, Daniel Adler, Immanuel Bloch, Johannes Zeiher
Summary: Coherent control of the collective optical properties of an array of quantum emitters can be achieved by driving a single ancilla atom to a Rydberg state. This allows for spatial control over the optical response and enhances light-matter coupling at the level of single quanta. These results represent progress towards realizing quantum coherent metasurfaces, controlled atom-photon entanglement, and deterministic engineering of quantum states of light.
Article
Optics
Wenfang Li, Jinjin Du, Mark Lam, Wenhui Li
Summary: This study investigates the telecom-wavelength spectra of a Rydberg state in an atomic vapor using a three-photon excitation scheme. By pumping rubidium-85 atoms to a specific state and driving a transition to the Rydberg state, the probe spectra are analyzed over different power levels of the pump lasers. The results, along with a simulation based on a theoretical model, provide important insights for future experiments connecting fiber optics and radio transmission via Rydberg atoms.
Article
Optics
Xiaoguang Huo, J. F. Chen, Jing Qian, Weiping Zhang
Summary: This paper presents a nondestructive and ultrasensitive imaging scheme for imaging Rydberg atoms within an ensemble of cold probe atoms. By utilizing interaction-enhanced electromagnetically induced transparency, the distribution of Rydberg atoms with high spatial resolution and fast response can be obtained for more precise real-time imaging.
Article
Multidisciplinary Sciences
Angana Bhattacharya, Rakesh Sarkar, Naval K. Sharma, Bhairov K. Bhowmik, Amir Ahmad, Gagan Kumar
Summary: This study introduces a novel metamaterial geometry for multiband transparency in the terahertz domain, utilizing strong near field coupling between toroidal excitation and C-resonators to achieve multiple transparency windows. High Q factor resonances are reported, and the frequency modulation of transparency windows by changing the distance between TSRR and C resonators is demonstrated. The study has the potential to impact the development of terahertz photonic components for next generation devices.
SCIENTIFIC REPORTS
(2021)
Article
Optics
Yue Cui, Feng-Dong Jia, Jian-Hai Hao, Yu -Han Wang, Fei Zhou, Xiu-Bin Liu, Yong -Hong Yu, Jiong Mei, Jin-Hai Bai, Ying-Ying Bao, Dong Hu, Yu Wang, Ya Liu, Jian Zhang, Feng Xie, Zhi-Ping Zhong
Summary: We demonstrate the use of an auxiliary microwave field to extend the bandwidth sensitivity of Rydberg-atom-based microwave electrometry. By shifting the atomic energy levels with an appropriate auxiliary microwave field, resonance with the target microwave field can be achieved for Rydberg-Rydberg transitions of interest, increasing the measurement sensitivity by a factor of 10 compared to without the auxiliary field.
Article
Physics, Applied
Nikunjkumar Prajapati, Amy K. Robinson, Samuel Berweger, Matthew T. Simons, Alexandra B. Artusio-Glimpse, Christopher L. Holloway
Summary: This study demonstrates improved sensitivity of Rydberg electrometry based on electromagnetically induced transparency (EIT) with a ground state repumping laser, which enhances the interaction strength without additional Doppler or power broadening. The nearly doubled EIT amplitude without increased peak width is achieved through this method, showing that similar amplitude increase without repumping field is not possible through simple optimization. The study also identifies photon shot noise of the probe laser as a key limit to detection sensitivity, and shows a nearly 2x improvement in sensitivity with the presence of the repump field.
APPLIED PHYSICS LETTERS
(2021)
Article
Optics
Tie Wang, Cheng-Hua Bai, Dong-Yang Wang, Shutian Liu, Shou Zhang, Hong-Fu Wang
Summary: The study demonstrates Faraday and splitting effects induced by optical mode conversion in a double-cavity optomechanical system, achieving optical Faraday rotation and manipulation of spin angular momentum of photons through optomechanical interaction.
Article
Optics
Hsuan-Jui Su, Jia-You Liou, I-Chun Lin, Yi-Hsin Chen
Summary: The effects of laser polarization, magnetic fields, laser intensities, and the optical density of the thermal Rb-87 medium on Rydberg-state electromagnetically-induced-transparency (EIT) were investigated. The study found that high-contrast Rydberg EIT can be achieved under optimized conditions, and this technique can be used as a quantum sensor to detect electromagnetic fields in the environment.
Article
Optics
Amy K. Robinson, Alexandra B. Artusio-Glimpse, Matthew T. Simons, Christopher L. Holloway
Summary: In this study, electromagnetically induced transparency (EIT) and Autler-Townes splitting in Rydberg rubidium atoms were investigated using a six-level excitation scheme. Experimental results for various excitation parameters were presented, along with two theoretical models capturing different aspects of the observed atomic spectra. Both the six-level model and the more complex eight-level model showed very good agreement with the experimental data.
Article
Physics, Applied
Nikunjkumar Prajapati, Narayan Bhusal, Andrew P. Rotunno, Samuel Berweger, Matthew T. Simons, Alexandra B. Artusio-Glimpse, Ying Ju Wang, Eric Bottomley, Haoquan Fan, Christopher L. Holloway
Summary: We compare the sensitivity of co-linear three-photon electromagnetically induced transparency (EIT) to radio frequency electric fields in Cs-133 Rydberg atoms against the conventional two-photon system. By modeling the atomic systems, we find that the three-photon system has narrower linewidths but does not align with the regions of best sensitivity. Additionally, we calculate the expected sensitivity for the two-photon Rydberg sensor and find that it is over an order of magnitude better than the current measured values, accounting for additional noise sources and quantum efficiency of photo-detectors.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Optics
Jingxu Bai, Yuechun Jiao, Yunhui He, Rong Song, Jianming Zhao, Suotang Jia
Summary: This study demonstrates the three-photon Autler-Townes (AT) spectroscopy in a cold cesium Rydberg four-level atom and investigates the positions of AT peaks and AT splittings, as well as their dependence on the characteristics of the coupling lasers. The research finds that AT splitting γ(AB) mainly comes from the first photon coupling, while γ(BC) mainly comes from the second photon coupling. The simulated results show good agreement with the theoretical simulations considering spectral line broadening.
Article
Physics, Multidisciplinary
Shang-Yu Zhai, Jin-Hui Wu
Summary: The study focused on the steady optical response of a square lattice with trapped atoms driven into the ladder configuration of EIT. Key parameters like lattice dimension, unitary vdW shift, probe Rabi frequency, and coupling detuning were found to critically influence the absorption and dispersion of EIT spectra. Modulating these parameters can change the symmetries of the spectra and control the depth and position of the transparency window, showing potential for manipulating non-equilibrium quantum phenomena using vdW interactions of Rydberg atoms.
Article
Physics, Multidisciplinary
Auxiliadora Padron-Brito, Roberto Tricarico, Pau Farrera, Emanuele Distante, Klara Theophilo, Darrick Chang, Hugues de Riedmatten
Summary: The experimental results show that the value of the second-order autocorrelation function of the transmitted light significantly varies at different positions within the pulse and during the transients of the pulse; the falling edge of the transmitted pulse displays much lower values compared to the rest of the pulse.
NEW JOURNAL OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
Christian Gross, Thibault Vogt, Wenhui Li
PHYSICAL REVIEW LETTERS
(2020)
Article
Multidisciplinary Sciences
Abhishek Kumar, Ankur Solanki, Manukumara Manjappa, Sankaran Ramesh, Yogesh Kumar Srivastava, Piyush Agarwal, Tze Chien Sum, Ranjan Singh
News Item
Physics, Multidisciplinary
Wenhui Li
Article
Quantum Science & Technology
B. Jaderberg, A. Agarwal, K. Leonhardt, M. Kiffner, D. Jaksch
QUANTUM SCIENCE AND TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Zijie Dai, Manukumara Manjappa, Yunkun Yang, Thomas Cai Wei Tan, Bo Qiang, Song Han, Liang Jie Wong, Faxian Xiu, Weiwei Liu, Ranjan Singh
Summary: Cadmium arsenide, a Dirac semimetal, shows remarkable optical nonlinearity and high electron mobility at terahertz frequencies, offering potential for high-performance electronic and photonic devices. The active control of photoconductivity in ultrathin films allows for low-power, ultrafast modulation of terahertz waves.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Optics
Mark Lam, Sambit B. Pal, Thibault Vogt, Martin Kiffner, Wenhui Li
Summary: In this study, Rb-85 atoms are optically excited to a low-lying Rydberg state in a heated vapor cell, resulting in the generation of directional terahertz (THz) beams and ultraviolet (UV) light. By characterizing the generated THz power over detuning and power of pump lasers, experimental conditions favoring THz and UV generation are identified. This scheme paves a new pathway towards generating high-power narrowband THz radiation.
Article
Multidisciplinary Sciences
Bo Wu, Weihua Ning, Qiang Xu, Manukumara Manjappa, Minjun Feng, Senyun Ye, Jianhui Fu, Stener Lie, Tingting Yin, Feng Wang, Teck Wee Goh, Padinhare Cholakkal Harikesh, Yong Kang Eugene Tay, Ze Xiang Shen, Fuqiang Huang, Ranjan Singh, Guofu Zhou, Feng Gao, Tze Chien Sum
Summary: Bismuth-based double perovskite Cs2AgBiBr6, despite being considered a potential candidate for high-stability perovskite solar cells, exhibits poor performance due to the strong self-trapping effect, resulting in limitations for its application in photovoltaics.
Review
Chemistry, Physical
Andrey Baydin, Fuyang Tay, Jichao Fan, Manukumara Manjappa, Weilu Gao, Junichiro Kono
Summary: This article discusses the applications of carbon nanotubes in quantum technology. Carbon nanotubes possess one-dimensional electronic states, excitons, and phonons, which make them suitable for developing quantum devices with high operating temperatures. The article covers the fundamental properties of carbon nanotubes, their growth and purification methods, and methodologies for assembling them into structures that exhibit macroscopic quantum properties. Most importantly, recent developments and proposals for quantum information processing devices based on individual and assembled nanotubes are reviewed.
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
Physics, Multidisciplinary
Jinjin Du, Thibault Vogt, Wenhui Li
Summary: We introduce well-separated 87Rb+ ions into an atomic ensemble and achieve single-shot imaging of individual ions with an exposure time of 1 mu s using homodyne detection. The ion detection fidelity is (80 +/- 5)% as analyzed from the absorption spots in the acquired images. These in situ images provide a direct visualization of ion-Rydberg interaction blockade and reveal spatial correlations between Rydberg excitations. The capability of imaging individual ions in a single shot is important for studying collisional dynamics in hybrid ion-atom systems and for using ions as probes in quantum gas measurements.
PHYSICAL REVIEW LETTERS
(2023)
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
