Article
Quantum Science & Technology
Marlon Schaefer, Benjamin Kambs, Dennis Herrmann, Tobias Bauer, Christoph Becher
Summary: This work presents a highly efficient and low-noise quantum frequency conversion device for photons emitted by a silicon-vacancy center in diamond to the telecom C-band. By using a two-stage difference-frequency mixing scheme, the device successfully avoids noise issues and achieves low noise rate as well as high conversion efficiency.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Multidisciplinary Sciences
K. Singh, C. E. Bradley, S. Anand, V. Ramesh, R. White, H. Bernien
Summary: Scaling up quantum processors is challenging due to the errors involved. One proposed solution involves using auxiliary spectator qubits as probes of noise to enable real-time correction of data qubit errors. In this study, using cesium spectator qubits, we corrected phase errors on rubidium data qubits and suppressed correlated errors within the execution of the quantum circuit. This protocol establishes important tools for scaling neutral-atom quantum processors.
Article
Physics, Multidisciplinary
Eloi Descamps, Nicolas Fabre, Arne Keller, Perola Milman
Summary: We investigate the impact of the electromagnetic field's frequency on the precision limits of time measurements from a quantum perspective, utilizing single photons as a representative system. Our results show that quantum precision enhancement is only achievable by combining both intensity and spectral resources, with spectral correlations allowing for quadratic scaling of precision with the number of probes. We reveal the mathematical structure of nonphysical states that attain the Heisenberg limit and demonstrate how finite spectral variance can induce a quantum-to-classical-like transition in precision scaling similar to noisy systems. In addition, we offer a comprehensive interpretation of our findings in the time-frequency phase space, identifying the spectral classical resources.
PHYSICAL REVIEW LETTERS
(2023)
Article
Optics
Wei-Hang Zhang, Ying-Hao Ye, Lei Zeng, Ming-Xin Dong, En-Ze LI, Jing-Yuan Peng, Yan LI, Dong-Sheng Ding, Bao-Sen Shi
Summary: In this experiment, the frequency down-conversion through the four-wave mixing process in a cold 85Rb atomic ensemble was investigated. The results showed that the frequency-conversion efficiency can reach up to 32% with an improvement in the optical depth. It was also found that the efficiency may exceed 32% when the signal-to-noise ratio of the detected telecom field is higher than 10 and the mean signal count is larger than 0.2. This work can be combined with quantum memories based on cold 85Rb ensemble to serve for long-distance quantum networks.
Article
Automation & Control Systems
Hao Ding, Quanjie Li, Xiaoqiang Guo, Yong Yang, Zhigang Lu
Summary: DC-link current ripple is an important performance indicator of a current-source converter and is closely related to the modulation strategy. Excessive ripple reduces system efficiency, increases total harmonic distortion of grid current, and causes electromagnetic interference. In this article, a novel modulation strategy is proposed to reduce ripple by optimizing the switching sequence according to the modulation index. The proposed strategy effectively reduces current ripple across the modulation index range without increasing switching frequency or inductor, and experimental results confirm its validity.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Optics
Yue-Xun Huang, Ming Li, Zi-Jie Chen, Yan-Lei Zhang, Xu-Bo Zou, Guang-Can Guo, Chang-Ling Zou
Summary: Mean-field treatment (MFT) is commonly used for approximating the dynamics of quantum optics systems. However, neglecting quantum correlations between modes can lead to unexpected quantum effects. This study presents a theoretical framework based on perturbation theory and MFT to capture these effects and predicts the form and relationship of nonlinear dissipation, parasitic Hamiltonian, and nonlinear coupling rate. The framework is applied to quantum frequency conversion and shows excellent agreement with numerical simulations, revealing the neglected quantum effects by MFT and providing a more precise framework for nonlinear and quantum optics.
LASER & PHOTONICS REVIEWS
(2023)
Article
Multidisciplinary Sciences
Yusuke Asakuma, Tomoisa Maeda, Takahiro Takai, Anita Hyde, Chi Phan, Shinya Ito, Shuji Taue
Summary: The study investigates the effect of microwaves on water, showing that microwave irradiation can significantly reduce the refractive index of water and cause a delayed recovery after irradiation is stopped. The findings suggest a relationship between microwave-induced reactions and enhanced aqueous reactions and call for further investigation.
SCIENTIFIC REPORTS
(2022)
Article
Optics
Jatadhari Mishra, Timothy P. McKenna, Edwin Ng, Hubert S. Stokowski, Marc Jankowski, Carsten Langrock, David Heydari, Hideo Mabuchi, M. M. Fejer, Amir H. Safavi-Naeini
Summary: TFLN-on-Sapphire platform demonstrates efficient frequency conversion and high transparency in the mid-infrared region, showing promising prospects for integrated nonlinear nanophotonics.
Article
Optics
Ivan A. Burenkov, Irina Novikova, Olga Tikhonova, Sergey Polyakov
Summary: Novel photonic devices such as broadband quantum memory and efficient quantum frequency transduction can be implemented using three-wave mixing processes in a 1D array of nonlinear waveguides evanescently coupled to nearest neighbors. By adapting coherent processes from atomic optics and using classical and quantum models of optical fields, devices that are difficult or impossible to implement by conventional techniques can be realized.
Article
Quantum Science & Technology
Beatrice Da Lio, Carlos Faurby, Xiaoyan Zhou, Ming Lai Chan, Ravitej Uppu, Henri Thyrrestrup, Sven Scholz, Andreas D. Wieck, Arne Ludwig, Peter Lodahl, Leonardo Midolo
Summary: This article presents a quantum frequency conversion scheme for converting single photons emitted by quantum dots to the telecommunication C band. The conversion achieves high end-to-end efficiency, purity, and indistinguishability.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Optics
Di Zhu, Changchen Chen, Mengjie Yu, Linbo Shao, Yaowen Hu, C. J. Xin, Matthew Yeh, Soumya Ghosh, Lingyan He, Christian Reimer, Neil Sinclair, Franco N. C. Wong, Mian Zhang, Marko Loncar
Summary: This study demonstrates the manipulation of frequency and bandwidth of single-photon pulses using an integrated thin-film lithium niobate (TFLN) phase modulator, and shows the potential of on-chip quantum spectral control for scalable photonic quantum information processing.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Chemistry, Physical
Sanoj Raj, Ruben A. Fritz, Felipe Herrera, Yamil J. Colon
Summary: Spontaneous parametric down conversion (SPDC) is a quantum second-order nonlinear optical process used in quantum information processing. Understanding factors that can significantly alter the intrinsic properties of materials is useful in developing new SPDC efficient materials. Our study focuses on the impact of ligand arrangement and temperature on the properties of entangled photon pairs in MOF crystals. We find that the arrangement and alignment of pyridine rings in the crystal structure significantly affect the effective nonlinearity (d(eff)) and birefringence (Delta n), which in turn affect the correlation times (tau(c)) in coincidence measurements.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Optics
Hai-Tao Tu, Kai-Yu Liao, Zuan-Xian Zhang, Xiao-Hong Liu, Shun-Yuan Zheng, Shu-Zhe Yang, Xin-Ding Zhang, Hui Yan, Shi-Liang Zhu
Summary: High-resolution quantum-dot LEDs demonstrated using transfer printing could be beneficial for next-generation displays. Coherent microwave-to-optics transduction is achieved using Rydberg atoms and off-resonant scattering technique, with high efficiency and wide bandwidth.
Article
Environmental Sciences
Gang Xu, Min Deng, Geng Sun, Ya Guo, Jie Chen
Summary: This paper proposes a knowledge distillation-based building extraction method to reduce the impact of noise on the model and improve the performance. The method utilizes the generalizable knowledge from large-scale noisy samples and accurate supervision from small-scale clean samples to train a teacher and student network. Experimental results show that the student network can alleviate the influence of noise labels and achieve accurate building extraction.
Article
Multidisciplinary Sciences
Charlotte R. Findlay, Laia Rojano-Donate, Jakob Tougaard, Mark P. Johnson, Peter Teglberg Madsen
Summary: Global reductions in underwater radiated noise levels from cargo vessels are necessary to mitigate the accumulative impacts on marine wildlife. By utilizing a vessel exposure simulation model, we demonstrate that reducing vessel source levels through slowdowns and technological modifications can significantly decrease the area exposed to ship noise. Furthermore, despite the longer duration it takes for a slower vessel to pass an animal, slowdowns effectively mitigate all impacts to marine mammals. Hence, we suggest implementing speed reductions as an immediate solution to reduce cumulative noise impacts, which can be scalable from local areas to global ocean basins. Additionally, routing vessels away from critical habitats and employing technological modifications to minimize vessel noise can further supplement these efforts.
Article
Optics
Paulina S. Kuo, Thomas Gerrits, Varun B. Verma, Sae Woo Nam
Article
Optics
Paulina S. Kuo, Glenn S. Solomon
Article
Optics
J. S. Pelc, Paulina S. Kuo, Oliver Slattery, Lijun Ma, Xiao Tang, M. M. Fejer
Article
Optics
Paulina S. Kuo, Oliver Slattery, Yong-Su Kim, Jason S. Pelc, M. M. Fejer, Xiao Tang
Article
Optics
Graeme A. Hill, James H. Rice, Stephen R. Meech, Duncan Q. M. Craig, Paulina Kuo, Konstantin Vodopyanov, Michael Reading
Article
Optics
Paulina S. Kuo, Jason S. Pelc, Oliver Slattery, Yong-Su Kim, M. M. Fejer, Xiao Tang
Article
Multidisciplinary Sciences
Paulina S. Kuo, Jorge Bravo-Abad, Glenn S. Solomon
NATURE COMMUNICATIONS
(2014)
Article
Optics
Paulina S. Kuo, M. M. Fejer
Article
Optics
Paulina S. Kuo
Summary: This study investigates the noncritical phasematching behavior in thin-film, periodically poled lithium niobate (PPLN) waveguides. It is found that although the sensitivity of phasematching to waveguide thickness can be minimized, it cannot be completely eliminated. Limits on acceptable thickness variation are estimated, and the scaling with device length for second-harmonic generation and sum-frequency generation in thin-film PPLN frequency converters is discussed.
Article
Optics
Paulina S. Kuo, Varun B. Verma, Sae Woo Nam
Article
Optics
Paulina S. Kuo
Proceedings Paper
Engineering, Electrical & Electronic
Paulina S. Kuo, Thomas Gerrits, Varun Verma, Sae Woo Nam
ADVANCES IN PHOTONICS OF QUANTUM COMPUTING, MEMORY, AND COMMUNICATION X
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Paulina S. Kuo, Thomas Gerrits, Varun Verma, Sae Woo Nam, Oliver Slattery, Lijun Ma, Xiao Tang
ADVANCES IN PHOTONICS OF QUANTUM COMPUTING, MEMORY, AND COMMUNICATION IX
(2016)
Proceedings Paper
Nanoscience & Nanotechnology
Paulina S. Kuo, Jason S. Pelc, Oliver Slatter, Lijun Ma, Xiao Tang
NONLINEAR OPTICS AND ITS APPLICATIONS VIII; AND QUANTUM OPTICS III
(2014)
