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Conference on Lasers and Electro-Optics (CLEO)

作者： Taewon Park Hubert S. Stokowski Timothy P. McKenna Alexander Y. Hwang Devin Dean Luke Qi Oguz Tolga Celik Vahid Ansari Martin M. Fejer Amir H. Safavi-Naeini Department of Electrical Engineering Stanford University Stanford California USA Ginzton Laboratory and Department of Applied Physics Stanford University Stanford California USA NTT Research Inc. NTT Physics and Informatics Laboratories East Palo Alto CA USA

We present our recent effort towards building an integrated photonic circuitry on thin-film lithium niobate platform for squeezed state of light generation from an optical parametric oscillator.

ISBN: (纸本)9781957171258

We present our recent effort towards building an integrated photonic circuitry on thin-film lithium niobate platform for squeezed state of light generation from an optical parametric oscillator.

关键词： Lithium niobate Optical components Parametric oscillators Phase measurement Phase shift Squeezed states

Sample-efficient model-based reinforcement learning for quantum control

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Physical Review Research 2023年第4期5卷 043002-043002页

作者： Irtaza Khalid Carrie A. Weidner Edmond A. Jonckheere Sophie G. Schirmer Frank C. Langbein School of Computer Science and Informatics Cardiff University Cardiff CF24 4AG United Kingdom Quantum Engineering Technology Laboratories H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering University of Bristol Bristol BS8 1FD United Kingdom Department of Electrical and Computer Engineering University of Southern California Los Angeles California 90007 USA Department of Physics Swansea University Swansea SA2 8PP United Kingdom

We propose a model-based reinforcement learning (RL) approach for noisy time-dependent gate optimization with reduced sample complexity over model-free RL. Sample complexity is defined as the number of controller interactions with the physical system. Leveraging an inductive bias, inspired by recent advances in neural ordinary differential equations (ODEs), we use an autodifferentiable ODE, parametrized by a learnable Hamiltonian ansatz, to represent the model approximating the environment, whose time-dependent part, including the control, is fully known. Control alongside Hamiltonian learning of continuous time-independent parameters is addressed through interactions with the system. We demonstrate an order of magnitude advantage in sample complexity of our method over standard model-free RL in preparing some standard unitary gates with closed and open system dynamics, in realistic computational experiments incorporating single-shot measurements, arbitrary Hilbert space truncations, and uncertainty in Hamiltonian parameters. Also, the learned Hamiltonian can be leveraged by existing control methods like GRAPE (gradient ascent pulse engineering) for further gradient-based optimization with the controllers found by RL as initializations. Our algorithm, which we apply to nitrogen vacancy (NV) centers and transmons, is well suited for controlling partially characterized one- and two-qubit systems.

关键词： Machine learning Open quantum systems & decoherence Quantum computation Quantum control Quantum feedback Quantum information processing Quantum information theory Quantum parameter estimation Quantum tomography

The Role of Electric Grid Research in Addressing Climate Change

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arXiv 2024年

作者： Xie, Le Majumder, Subir Huang, Tong Zhang, Qian Chang, Ping Hill, David J. Shahidehpour, Mohammad Department of Electrical and Computer Engineering Texas A&M University College StationTX77843 United States Harvard John A. Paulson School of Engineering and Applied Sciences Harvard University CambridgeMA02134 United States Department of Electrical and Computer Engineering San Diego State University San DiegoCA92182 United States Department of Oceanography Texas A&M University College StationTX77843 United States Department of Electrical and Computer Systems Engineering Monash University ClaytonVIC3800 Australia Robert W. Galvin Center for Electricity Innovation Illinois Institute of Technology ChicagoIL60610 United States

Addressing the urgency of climate change necessitates a coordinated and inclusive effort from all relevant stakeholders. Critical to this effort is the modeling, analysis, control, and integration of technological innovations within the electric energy system, which plays a crucial role in scaling up climate change solutions. This perspective article presents a set of research challenges and opportunities in the area of electric power systems that would be crucial in accelerating Gigaton-level decarbonization. Furthermore, it highlights institutional challenges associated with developing market mechanisms and regulatory architectures, ensuring that incentives are aligned for stakeholders to effectively implement the technological solutions on a large scale. Copyright © 2024, The Authors. All rights reserved.

关键词： Kyoto Protocol

Target Controllability and Target Observability of Structured Network Systems

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arXiv 2023年

作者： Montanari, Arthur N. Duan, Chao Motter, Adilson E. The Department of Physics and Astronomy Northwestern University EvanstonIL60208 United States The School of Electrical Engineering Xi’an Jiaotong University Xi’an710049 China The Department of Physics and Astronomy The Department of Engineering Sciences and Applied Mathematics The Northwestern Institute on Complex Systems Northwestern University EvanstonIL60208 United States

The duality between controllability and observability enables methods developed for full-state control to be applied to full-state estimation, and vice versa. In applications in which control or estimation of all state variables is unfeasible, the generalized notions of output controllability and functional observability establish the minimal conditions for the control and estimation of a target subset of state variables, respectively. Given the seemly unrelated nature of these properties, thus far methods for target control and target estimation have been developed independently in the literature. Here, we characterize the graph-theoretic conditions for target controllability and target observability (which are, respectively, special cases of output controllability and functional observability for structured systems). This allow us to rigorously establish a weak and strong duality between these generalized properties. When both properties are equivalent (strongly dual), we show that efficient algorithms developed for target controllability can be used for target observability, and vice versa, for the optimal placement of sensors and drivers. These results are applicable to large-scale networks, in which control and monitoring are often sought for small subsets of nodes. Copyright © 2023, The Authors. All rights reserved.

关键词： Observability

Rare Isotope-Containing Diamond Color Centers for Fundamental Symmetry Tests

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arXiv 2023年

作者： Morris, Ian M. Klink, Kai Singh, Jaideep T. Mendoza-Cortes, Jose L. Nicley, Shannon S. Becker, Jones N. Department of Physics and Astronomy Michigan State University United States Department of Chemical Engineering & Materials Science Michigan State University United States Department of Electrical and Computer Engineering Michigan State University Department of Chemical Engineering & Materials Science Michigan State University United States Fraunhofer USA Inc United States Fraunhofer USA Inc. United States Department of Electrical and Computer Engineering Michigan State University United States

Detecting a non-zero electric dipole moment (EDM) in a particle would unambiguously signify physics beyond the Standard Model. A potential pathway towards this is the detection of a nuclear Schiff moment, the magnitude of which is enhanced by the presence of nuclear octupole deformation. However, due to the low production rate of isotopes featuring such"pear-shaped" nuclei, capturing, detecting, and manipulating them efficiently is a crucial prerequisite. Incorporating them into synthetic diamond optical crystals can produce defects with defined, molecule-like structures and isolated electronic states within the diamond band gap, increasing capture efficiency, enabling repeated probing of even a single atom, and producing narrow optical linewidths. In this study, we used density functional theory (DFT) to investigate the formation, structure, and electronic properties of crystal defects in diamond containing 229Pa, a rare isotope that is predicted to have an exceptionally strong nuclear octupole deformation. In addition, we identified and studied stable lanthanide-containing defects with similar electronic structures as non-radioactive proxies to aid in experimental methods. Our findings hold promise for the existence of such defects and can contribute to the development of a quantum information processing-inspired toolbox of techniques for studying rare isotopes. © 2023, CC BY.

关键词： Electronic properties

FastStamp: Accelerating Neural Steganography and Digital Watermarking of Images on FPGAs

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arXiv 2022年

作者： Hussain, Shehzeen Sheybani, Nojan Neekhara, Paarth Zhang, Xinqiao Duarte, Javier Koushanfar, Farinaz Department of Electrical and Computer Engineering UC San Diego United States Department of Computer Science and Engineering UC San Diego United States Department of Physics UC San Diego United States

Steganography and digital watermarking are the tasks of hiding recoverable data in image pixels. Deep neural network (DNN) based image steganography and watermarking techniques are quickly replacing traditional hand-engineered pipelines. DNN based watermarking techniques have drastically improved the message capacity, imperceptibility and robustness of the embedded watermarks. However, this improvement comes at the cost of increased computational overhead of the watermark encoder neural network. In this work, we design the first accelerator platform FastStamp to perform DNN based steganography and digital watermarking of images on hardware. We first propose a parameter efficient DNN model for embedding recoverable bit-strings in image pixels. Our proposed model can match the success metrics of prior state-of-the-art DNN based watermarking methods while being significantly faster and lighter in terms of memory footprint. We then design an FPGA based accelerator framework to further improve the model throughput and power consumption by leveraging data parallelism and customized computation paths. FastStamp allows embedding hardware signatures into images to establish media authenticity and ownership of digital media. Our best design achieves 68× faster inference as compared to GPU implementations of prior DNN based watermark encoder while consuming less power. Copyright © 2022, The Authors. All rights reserved.

关键词： Steganography

Automated Bell Inequality Violation using Uncalibrated Fiber Squeezing Polarization Controllers

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Automated Bell Inequality Violation using Uncalibrated Fiber...

2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Dowling, Evan Morris, Mark Baumgartner, Gerald Roy, Rajarshi Murphy, Thomas E. Inst. for Research in Electronics & Applied Physics University of Maryland College ParkMD20740 United States Dept. of Physics University of Maryland College ParkMD20740 United States Laboratory for Telecommunication Sciences College ParkMD20740 United States Inst. for Physical Science & Technology University of Maryland College ParkMD20740 United States Dept. of Electrical & Computer Engineering University of Maryland College ParkMD20740 United States

We experimentally report on a real-time self-guided method to search for maximal CHSH violations between two observers sharing polarization entangled photon pairs using uncalibrated piezoelectric fiber squeezers as po...

ISBN: (纸本)9781957171258

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Optical Skyrmionic Hopfion Induced Surface Structures in Azopolymers via Photo-Induced Mass Transport

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Optical Skyrmionic Hopfion Induced Surface Structures in Azo...

Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Rihito Tamura Praveen Kumar A. Srinivasa Rao Natalia M. Litchinitser Takashige Omatsu Graduate School of Engineering Chiba University Japan Department of Physics Indian Institute of Technology Bhilai India Molecular Chirality Research Center Chiba University Japan Institute for Advanced Academic Research Chiba University Japan Department of Electrical and Computer Engineering Duke University USA

We report on the formation of surface relief structures of azopolymers by irradiation of optical skyrmionic hopfion. The reliefs reflect exotic polarization textures of hopfion and will pave the way for advanced rewri... 详细信息

ISBN: (数字)9798350372076

ISBN: (纸本)9798350372083

关键词： Radiation effects Optical polarization Optical device fabrication Surface emitting lasers Memory Lasers and electrooptics Surface structures

Integrated photonic platforms for quantum technology: a review

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ISSS Journal of Micro and Smart Systems 2023年第2期12卷 83-104页

作者： Ramakrishnan, Rohit K. Ravichandran, Aravinth Balaji Mishra, Arpita Kaushalram, Archana Hegde, Gopalkrishna Talabattula, Srinivas Rohde, Peter P. Department of Electrical Communication Engineering Indian Institute of Science Bengaluru India Department of Instrumentation and Applied Physics Indian Institute of Science Bengaluru India Centre for BioSystems Science and Engineering Indian Institute of Science Bengaluru India Centre for Quantum Software and Information University of Technology Sydney 15 Broadway Ultimo Australia

Quantum information processing has conceptually changed the way we process and transmit information. Our understanding of quantum physics, which explains the seemingly strange behavior of matter at the microscopic scales, has matured to the extent that we can now explore technologies based on the phenomenon. One such exciting application of quantum physics with far-reaching consequences is quantum computing. Quantum computing, which uses quantum bits (qubits) for information processing, has changed the way we process and transmit information in a fundamental way. Experiments suggest that the most successful candidates for realizing qubits are photons. Therefore, integrated photonic platforms play a crucial role in harnessing the potential of quantum technology. This paper surveys the various photonic platforms based on different materials for quantum information processing. The future of this technology depends on the successful materials that can be used to universally realize quantum devices, similar to silicon, which shaped the industry toward the end of the last century. While it would be hazardous to make definitive predictions about the quantum revolution, our overview of the current status of research on the various platforms based on the materials used could shed light on how the future of quantum computing could unfold.

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28 GHz front -end with duplexer in 40 nm CMOS technology for 5G beam-steering transceivers 14

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28 GHz front -end with duplexer in 40 nm CMOS technology for...

14th IEEE Dallas Circuits and Systems Conference, DCAS 2020

作者： Gkoutis, Panagiotis Konidas, Georgios Kalivas, Grigorios University of Patras Applied Electronics Laboratory Department of Electrical and Computer Engineering Greece

ISBN: (纸本)9781728185101

This paper presents a (transceiver) TRX front-end structure design for Phased Array applications in 40nm CMOS Bulk process. The proposed structure consists of the Power Amplifier (PA) the Low Noise Amplifier (LNA) along with a monolithic transformer duplexer for Antenna connection applied in half-duplex systems. The front end covers the millimeter wave (MMW) 5G band. The PA design contains two differential cascode stages with capacitor neutralization technique achieving a small signal gain (S21) of 22.86dB with a -3dB bandwidth (BW) at 22-34 GHz. Moreover, the PA reaches a PAEmax of 31.66% and a Psat of 18.5 dBm. The LNA design consist of two cascode stages using current reuse technique at the first stage, obtaining 17.5 dB gain (S21) with a -3 dB bandwidth from 22.5 to 31 GHz. Both amplifiers are connected to the antenna through a compact duplexer with minimum losses and sufficient isolation. © 2020 IEEE.

关键词： Power amplifiers