Article
Multidisciplinary Sciences
Luis Gonzalez-Guerrero, Guillermo Carpintero
Summary: We introduce a novel approach to coherent photonic THz systems that support complex modulation. Our proposed scheme utilizes a single optical path to overcome the issues present in current implementations and enables direct modulation of the output of an optical frequency comb, simplifying the system and increasing the transmitted RF power.
SCIENTIFIC REPORTS
(2022)
Article
Optics
Lauri Salmela, Mathilde Hary, Mehdi Mabed, Alessandro Foi, John M. Dudley, Goery Genty
Summary: In this study, a feed-forward neural network is trained to learn the differential propagation dynamics of ultrashort pulses in optical fibers, enabling direct numerical integration emulation of fiber propagation. Compared with a recurrent neural network, the feed-forward approach achieves faster training and computation, as well as reduced memory requirements. This approach is generic and can be extended to other physical systems.
Article
Engineering, Mechanical
Guowei Wang, Mengyan Ge, Lulu Lu, Ya Jia, Yunjie Zhao
Summary: The study investigates the mechanism of signal propagation in hybrid neural networks, considering the effects of external factors on signal transmission efficiency and accuracy.
NONLINEAR DYNAMICS
(2021)
Article
Engineering, Aerospace
Yanxin Huang, Weihua Su
Summary: This paper investigates the issue of model updating in multidisciplinary design optimization of aerospace structures, and proposes a method using neural networks to determine the structural dynamic characteristics of a higher fidelity model. The feasibility of this approach is demonstrated through case studies.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING
(2023)
Article
Quantum Science & Technology
C. W. Hogle, D. Dominguez, M. Dong, A. Leenheer, H. J. McGuinness, B. P. Ruzic, M. Eichenfield, D. Stick
Summary: Optical modulators are commonly used in experiments with trapped ions and neutral atoms to control light properties. However, these elements are expensive, bulky, and energy-consuming, which poses challenges for scalability. To overcome these issues, the integration of optical modulators with ion traps is necessary. In this study, we design, fabricate, and test an optical modulator that can be monolithically integrated with a surface-electrode ion trap. By using quantum tomography and multi-gate sequences, we enhance the sensitivity of fidelity measurement and achieve single qubit gate fidelities exceeding 99.7%.
NPJ QUANTUM INFORMATION
(2023)
Article
Engineering, Electrical & Electronic
Souvaraj De, Ranjan Das, Ravendra K. Varshney, Thomas Schneider
Summary: A comprehensive analysis was conducted on the thermal crosstalk issue in silicon photonic circuits, using metal and doped silicon heaters for different waveguide configurations. By performing full-wave thermal and optical simulations, the study proposed solutions to reduce phase crosstalk and improve thermal tuning efficiency, demonstrating superior performance in thermal crosstalk over existing designs for compact silicon photonic circuits operating at high temperatures.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Hong Huang, Zhi-yao Ning, Toshikaze Kariyado, Tomohiro Amemiya, Xiao Hu
Summary: We analyze a new type of photonic crystal fiber with distinct topology for the core and cladding by adjusting the position of air holes in each hexagonal unit cell. The p-d band inversion results in topological interface modes within the band gap, which can propagate with a nonzero momentum perpendicular to the fiber's cross section. The helical topological interface modes exhibit pseudospin-momentum locking inherited from the corresponding two-dimensional photonic crystal. Analytical studies of the wave functions for the topological interface modes successfully match the numerical results, providing a novel approach for information transfer using photonic crystal fiber.
Article
Chemistry, Analytical
Minseong Kim, Hyun-Chul Choi
Summary: This paper presents a new style transfer method called total style transfer, which resolves the limitation of existing methods that cannot fully transfer the scale-across style pattern of a style image into a content image by utilizing intra/inter-scale statistics of multi-scaled feature maps. The method achieves lower memory consumption, faster feed-forwarding speed, and the lowest style loss compared to recent cascade schemes and other style transfer methods.
Review
Nanoscience & Nanotechnology
Adria Grabulosa, Johnny Moughames, Xavier Porte, Muamer Kadic, Daniel Brunner
Summary: Continued miniaturization in electronic integrated circuits has reached its limit, while communication energy consumption has become the dominant limitation. To address this, we have developed a fabrication process for three-dimensional photonic integration using additive photo-induced polymerization. This allows for the printing of photonic waveguides and their stable integration on standard semiconductor samples.
Article
Multidisciplinary Sciences
Xiaowei Guo, Zhuojie Li, Xiaojie Zhu, Meixiao Zhan, Chenxi Wu, Xiang Ding, Kai Peng, Wenzhe Li, Xianjue Ma, Zhongwei Lv, Ligong Lu, Lei Xue
Summary: Autophagy is a degradation process that regulates various physiological and pathological activities. SNAI2, a crucial factor in cancer progression, has been identified as a regulator of autophagy. The binding of DNA targets is critical for FOXO3 to regulate protein nuclear localization, and SNAI2 expression is mediated by FOXO3. These findings reveal a new regulatory loop for inducing autophagy gene expression under energy stress.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Computer Science, Artificial Intelligence
Nicolas Couellan
Summary: This study focuses on the robustness of deep neural networks, proposing a simple concentration inequality to study the probability of network output deviating from its nominal value and using network conditions to regularize the loss function. Empirical evaluation shows that the proposed method accurately estimates the observed robustness.
Article
Computer Science, Artificial Intelligence
Abdullah Emir Cil, Kazim Yildiz, Ali Buldu
Summary: It is suggested to use the deep neural network (DNN) as a deep learning model for detecting DDoS attacks, and experiments have shown that the model can detect and classify attacks in network traffic with high accuracy.
EXPERT SYSTEMS WITH APPLICATIONS
(2021)
Article
Computer Science, Artificial Intelligence
Hamid Rezatofighi, Tianyu Zhu, Roman Kaskman, Farbod T. Motlagh, Javen Qinfeng Shi, Anton Milan, Daniel Cremers, Laura Leal-Taixe, Ian Reid
Summary: This paper addresses the task of set prediction using deep feed-forward neural networks. It presents a novel approach for learning to predict sets with unknown permutation and cardinality using deep neural networks. The validity of the proposed approach is demonstrated on various vision problems.
IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE
(2022)
Article
Engineering, Electrical & Electronic
Yaxi Yan, Faisal Nadeem Khan, Bin Zhou, Alan Pak Tao Lau, Chao Lu, Changjian Guo
Summary: A novel ultra-long distributed vibration sensor utilizing forward transmission and coherent detection is proposed, demonstrating localization of vibration events ranging from several hundred Hz to tens of kHz over a total length of 1230 km sensing fiber. Detection of frequencies from infrasound to ultrasound is possible, making it a promising candidate for vibration event detection and localization in long-haul and ultra-long-haul fiber links.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
Stefano Biasi, Riccardo Franchi, Davide Bazzanella, Lorenzo Pavesi
Summary: Local heating is widely used in integrated optics for trimming or tuning photonic components. This study demonstrates a simple two-layer feed-forward neural network based on thermally controlled Mach-Zehnder interferometers and microring resonators. It shows that the use of microheaters can limit the performance of the neural network. This work highlights the issue of thermal crosstalk in large thermally actuated integrated photonic circuits.
FRONTIERS IN PHYSICS
(2022)
Article
Optics
Maxime Jacquet, Malo Joly, Ferdinand Claude, Luca Giacomelli, Quentin Glorieux, Alberto Bramati, Iacopo Carusotto, Elisabeth Giacobino
Summary: Quantum effects of fields on curved spacetimes can be studied in the laboratory using quantum fluids. Researchers used a polariton fluid to study the Hawking effect and found that out-of-equilibrium physics is crucial for observing this effect, and that emission can be optimized by supporting the phase and density of the fluid upstream of the horizon.
EUROPEAN PHYSICAL JOURNAL D
(2022)
Article
Physics, Multidisciplinary
F. Claude, M. J. Jacquet, R. Usciati, I. Carusotto, E. Giacobino, A. Bramati, Q. Glorieux
Summary: In this study, we present an original angle-resolved coherent probe spectroscopy technique to characterize elementary excitations in polariton fluids. With unprecedented spectral and spatial resolution, we directly observe the low-energy phononic behavior and detect negative-energy modes, as well as reveal narrow spectral features precursory of dynamical instabilities due to the intrinsic out-of-equilibrium nature of the system.
PHYSICAL REVIEW LETTERS
(2022)
Article
Quantum Science & Technology
Mathieu Bozzio, Michal Vyvlecka, Michael Cosacchi, Cornelius Nawrath, Tim Seidelmann, Juan C. Loredo, Simone L. Portalupi, Vollrath M. Axt, Peter Michler, Philip Walther
Summary: “Quantum dot-based single-photon sources offer additional security benefits and coherence tunability for quantum cryptography. We benchmark their performance compared to other sources and highlight the advantages of using phonon-assisted and two-photon excitation for quantum key distribution and other primitives.”
NPJ QUANTUM INFORMATION
(2022)
Article
Quantum Science & Technology
Guilherme L. Zanin, Michael Antesberger, Maxime J. Jacquet, Paulo H. Souto Ribeiro, Lee A. Rozema, Philip Walther
Summary: Maxwell's Demon is at the heart of the relationship between quantum information processing and thermodynamics; photonic experiments offer great potential for exploring new regimes in quantum thermodynamics.
Correction
Optics
Maxime Jacquet, Malo Joly, Ferdinand Claude, Luca Giacomelli, Quentin Glorieux, Alberto Bramati, Iacopo Carusotto, Elisabeth Giacobino
EUROPEAN PHYSICAL JOURNAL D
(2022)
Article
Engineering, Electrical & Electronic
Alessandro Trenti, Martin Achleitner, Florian Prawits, Bernhard Schrenk, Hauke Conradi, Moritz Kleinert, Alfonso Incoronato, Francesco Zanetto, Franco Zappa, Ilaria Di Luch, Ozan Cirkinoglu, Xaveer Leijtens, Antonio Bonardi, Cedric Bruynsteen, Xin Yin, Christian Kiessler, Harald Herrmann, Christine Silberhorn, Mathieu Bozzio, Philip Walther, Hannah C. Thiel, Gregor Weihs, Hannes Huebel
Summary: This article presents the results of the Quantum Technology Flagship project UNIQORN in the field of integrated photonics for quantum communication applications. Different integration platforms, including indium phosphide, polymer, and CMOS-compatible silicon platforms, were used to manufacture components and sub-systems for quantum communication devices. The indium phosphide platform was used to produce a transmitter chip for quantum key distribution, while the polymer platform was utilized for engineering non-classical light sources. Additionally, a quantum random number generator and a transimpedance amplifier based on gallium arsenide high electron mobility transistors were also fabricated.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Zhu-Bo Wang, Chenyue Gu, Xin-Xin Hu, Ya-Ting Zhang, Ji-Zhe Zhang, Gang Li, Xiao-Dong He, Xu-Bo Zou, Chun-Hua Dong, Guang-Can Guo, Chang-Ling Zou
Summary: In this study, the dynamics of single atoms in a modified optical dipole trap with a backward propagating dipole trap beam were experimentally investigated. The collision rate between two atoms was changed by six times. The theoretical model predicts high probabilities of few-atom loading rates under appropriate experimental conditions. This work provides an alternative approach for controlling the dynamics of a few atoms in a dipole trap and studying the collective quantum optical effects of few atoms.
Article
Optics
P. Schiansky, T. Stroemberg, D. Trillo, V. Saggio, B. Dive, M. Navascues, P. Walther
Summary: In quantum mechanics, the reversibility of time evolution is based on the unitary nature. Recent experiments have demonstrated protocols for reverting unknown unitaries even in the case of unknown interactions with the target system, although these protocols are probabilistic. In this study, we show that quantum physics allows for deterministic time-reversal by taking advantage of the non-commuting nature of quantum operators. We present a recursive protocol with an arbitrarily high success probability for two-level quantum systems and achieve an average rewinding fidelity of over 95% using a photonic platform. Our protocol, which requires no knowledge of the quantum process to be rewound, is optimal in its running time and brings quantum rewinding into practical relevance.
Article
Education & Educational Research
Tao Tu, Chuan-Feng Li, Jin-Shi Xu, Guang-Can Guo
Summary: In this study, we investigate the use of delta functions in solving problems in the context of quantum mechanics. We analyze students' solutions and conduct interviews to uncover the difficulties they encounter. Common challenges include expressing position eigenstates using delta functions, expressing orthonormality of eigenfunctions with continuous spectra using delta functions, dealing with boundary conditions for delta function potentials, and calculating integrals involving delta functions. We also compare the similarities and differences in the use of delta functions in electrostatics and in quantum mechanics, and discuss the potential pedagogical implications of our findings.
PHYSICAL REVIEW PHYSICS EDUCATION RESEARCH
(2023)
Article
Physics, Multidisciplinary
M. J. Jacquet, L. Giacomelli, M. Joly, F. Claude, E. Giacobino, Q. Glorieux, I. Carusotto, A. Bramati
Summary: Vacuum quantum fluctuations near horizons can generate correlated emission through the Hawking effect. Using a driven-dissipative quantum fluid of microcavity polaritons, we simulate a quantum field theory on a black-hole spacetime and calculate the correlated emission. We find that quantum fluctuations can lead to a significant excitation of a quasinormal mode of the field theory, in addition to the Hawking effect at the sonic horizon. Observable signatures of this excitation are found in spatial density fluctuations and the spectrum of Hawking emission, suggesting a fluctuation-driven mechanism for the quantum excitation of quasinormal modes on black hole spacetimes.
PHYSICAL REVIEW LETTERS
(2023)
Correction
Multidisciplinary Sciences
Peter Schiansky, Julia Kalb, Esther Sztatecsny, Marie-Christine Roehsner, Tobias Guggemos, Alessandro Trenti, Mathieu Bozzio, Philip Walther
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
F. Claude, M. J. Jacquet, I. Carusotto, Q. Glorieux, E. Giacobino, A. Bramati
Summary: We use a high-resolution coherent probe spectroscopy method to study the dispersion of collective excitations in a polaritonic quantum fluid. By measuring the dispersion relation with high energy and wave-number resolution, we determine the speed of sound in the fluid and identify the contribution of an excitonic reservoir. We observe the generation of collective excitations at negative energies, on the ghost branch of the dispersion curve, and identify precursors of dynamical instabilities. Our methods enable precise study of quantum hydrodynamics in quantum fluids of light.
Article
Optics
Xing-Yu Zhu, Tao Tu, Guang-Can Guo, Chuan-Feng Li
Summary: In this paper, a strategy for measuring the parity of two spin qubits using modulated pulses and a superconducting resonator as a detector is proposed. It is found that the distinction between spin-parity states can be achieved with high fidelity within a short measurement time, enabling the deterministic preparation of various spin entangled states. The method can also be applied to parity measurements and surface codes of multiple spin qubits. These results pave the way for fault-tolerant quantum computation with spin qubits.
Proceedings Paper
Optics
F. Honz, F. Prawits, O. Alia, H. Sakr, T. Bradley, C. Zhang, R. Slavik, F. Poletti, G. Kanellos, R. Nejabati, P. Walther, D. Simeonidou, H. Hubel, B. Schrenk
Summary: In this study, coherent one-way quantum key distribution (QKD) at 1538 nm was successfully integrated into a 7.7 km long hollow-core fiber link with 17 EDFA-boosted C-band data channels. Despite the wideband layout of the classical channels, QKD operation proved successful.
2022 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC)
(2022)
