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Nonlinear Optics, NLO 2017

作者： Chen, Jia-Yang Sua, Yong Meng Zhao, Zitong Li, Mo Huang, Yu-Ping Department of Physics and Engineering Physics Stevens Institute of Technology HobokenNJ07030 United States Center for Distributed Quantum Computing Stevens Institute of Technology HobokenNJ07030 United States

ISBN: (纸本)9780960038060

quantum Zeno blockade allows all-optical switching in a counterintuitive "interactionfree" manner. Using a lithium-niobate microdisk cavity nanofabricated on chip, we have observed phase matched sum-frequency generation and interaction-free switching between optical pulses in two tightly confined whispering-gallery modes. We have also verified that our device is suitable for nonlinear operations in a single-photon regime. Our results point to a scalable, chip-integrated platform for nonlinear optics extendable to the quantum regime. © OSA 2017.

关键词： Niobium compounds

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Interaction-free all-optical modulation on chip

Interaction-free all-optical modulation on chip

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Frontiers in Optics, FiO 2017

作者： Chen, Jia-Yang Sua, Yong Meng Zhao, Zi-Tong Li, Mo Huang, Yu-Ping Department of Physics and Engineering Physics Stevens Institute of Technology HobokenNJ07030 United States Center for Distributed Quantum Computing Stevens Institute of Technology HobokenNJ07030 United States

We report the observation of quantum Zeno blockade on chip, where a lightwave is modulated by another in a distinct "interaction-free" manner. For quantum applications, we also verify its operations on singl... 详细信息

ISBN: (纸本)9781943580330

关键词： Light modulation

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Weather-proof quantum communications

Weather-proof quantum communications

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Frontiers in Optics, FiO 2017

作者： Sua, Yong Meng Fan, Heng Shahverdi, Amin Chen, Jia-Yang Martini, Rainer Huang, Yu-Ping Department of Physics and Engineering Physics Stevens Institute of Technology HobokenNJ07030 United States Center for Distributed Quantum Computing Stevens Institute of Technology HobokenNJ07030 United States Department of Electrical and Computer Engineering Stevens Institute of Technology HobokenNJ07030 United States

We identify a weather-proof channel for quantum communications using 3950 nm photons, and report on their generation and detection via parametric conversion with a measured coincidence to accidental ratio of 54±7... 详细信息

ISBN: (纸本)9781943580330

关键词： Brightness Parametric down conversion Photon correlations Photons quantum communications Sum frequency generation

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Selective detection of picosecond overlapping quantum modes

Selective detection of picosecond overlapping quantum modes

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Frontiers in Optics, FiO 2017

作者： Shahverdi, Amin Sua, Yong Meng Huang, Yu-Ping Department of Physics and Engineering Physics Stevens Institute of Technology HobokenNJ07030 United States Center for Distributed Quantum Computing Stevens Institute of Technology HobokenNJ07030 United States Department of Electrical and Computer Engineering Stevens Institute of Technology HobokenNJ07030 United States

We demonstrate selective frequency conversion of single photons in overlapping quantum modes of picosecond waveforms, achieving a detection signal-to-noise well exceeding the theoretical limit of the optimal time-freq... 详细信息

ISBN: (纸本)9781943580330

关键词： Signal to noise ratio

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Observation of quantum zeno blockade on chip

arXiv

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arXiv 2017年

When overlapping in an optical medium with nonlinear susceptibility, light waves can interact with each other, changing their phases, wavelengths, shapes, and so on. Such nonlinear effects, discovered over a half century ago, have given rise to a breadth of important applications. Applying to quantum-mechanical signals, however, they face fundamental challenges arising from the multimode nature of the interacting electromagnetic fields, such as phase noises and Raman scattering. quantum Zeno blockade allows strong interaction of light waves without them physically overlapping, thus providing a viable solution for those challenges, as indicated in recent bulk-optics experiments. Here, we report on the observation of quantum Zeno blockade on chip, where a light wave is modulated by another in a distinct "interaction-free" manner. For quantum applications, we also verify its operations on a single-photon level. Our results promise a scalable platform for overcoming several grand challenges faced by nonlinear optics and quantum information processing, enabling, e.g., manipulation and interaction of quantum signals without decoherence. Copyright © 2017, The Authors. All rights reserved.

关键词： Nonlinear optics

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DrugProtKGE: Weakly Supervised Knowledge Graph Embedding for Highly-Effective Drug-Protein Interaction Representation

DrugProtKGE: Weakly Supervised Knowledge Graph Embedding for...

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2023 IEEE International Conference on Bioinformatics and Biomedicine, BIBM 2023

作者： Qiu, Yanlong Wang, Siqi Yang, Xi Qiu, Xinyuan Wu, Chengkun Cui, Yingbo Yang, Canqun National University of Defense Technology Institute for Quantum Information State Key Laboratory of High-Performance Computing College of Computer Science Hunan Changsha410073 China National Supercomputer Center in Tianjin Tianjin300457 China National University of Defense Technology National Key Laboratory of Parallel and Distributed Computing College of Computer Science Hunan Changsha410073 China National University of Defense Technology Department of Biology and Chemistry College of Science Hunan Changsha410073 China

ISBN: (纸本)9798350337488

With the exponential growth of biomedical knowledge in unstructured text repositories such as PubMed, it is imminent to establish a knowledge graph-style, efficient searchable and targeted database that can support the need of information retrieval from researchers and clinicians. To mine knowledge from graph databases, most previous methods view a triple in a graph (see Fig. 1) as the basic processing unit and embed the triplet element (i.e. drugs/chemicals, proteins/genes and their interaction) as separated embedding matrices, which cannot capture the semantic correlation among triple elements. To remedy the loss of semantic correlation caused by disjoint embeddings, we propose a novel approach to learn triple embeddings by combining entities and interactions into a unified representation. Furthermore, traditional methods usually learn triple embeddings from scratch, which cannot take advantage of the rich domain knowledge embedded in pre-trained models, and is also another significant reason for the fact that they cannot distinguish the differences implied by the same entity in the multi-interaction triples. In this paper, we propose a novel fine-tuning based approach to learn better triple embeddings by creating weakly supervised signals from pre-trained knowledge graph embeddings. The method automatically samples triples from knowledge graphs and estimates their pairwise similarity from pre-trained embedding models. The triples are then fed pairwise into a Siamese-like neural architecture, where the triple representation is fine-tuned in the manner bootstrapped by triple similarity scores. Finally, we demonstrate that triple embeddings learned with our method can be readily applied to several downstream applications (e.g. triple classification and triple clustering). We evaluated the proposed method on two open-source drug-protein knowledge graphs constructed from PubMed abstracts, as provided by BioCreative. Our method achieves consistent improvement in both t

关键词： Drug-Protein Interaction Knowledge Graph Embedding Triple Embedding Weakly Supervised Learning

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Experimental demonstration of a quantum downstream access network in continuous variable quantum key distribution with a local local oscillator

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Photonics Research 2024年第6期12卷 1262-1273页

作者： DENGKE QI XIANGYU WANG ZHENGHUA LI JIAYU MA ZIYANG CHEN YUEMING LU SONG YU State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China Key Laboratory of Trustworthy Distributed Computing and Service(MoE) Beijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronicsand Center for Quantum Information TechnologyPeking UniversityBeijing 100871China

quantum networks provide opportunities and challenges across a range of intellectual and technical frontiers,including quantum computation,communication,and *** traditional communication networks,quantum networks utilize quantum bits rather than classical bits to store and transmit *** key distribution(QKD)relying on the principles of quantum mechanics is a key component in quantum networks and enables two parties to produce a shared random secret key,thereby ensuring the security of data *** this work,we propose a cost-effective quantum downstream access network structure in which each user can get their corresponding key information through terminal *** on this structure,we demonstrate the first four-end-users quantum downstream access network in continuous variable QKD with a local local *** contrast to point-to-point continuous variable QKD,the network architecture reevaluates the security of each user and accounts for it accordingly,and each user has a lower tolerance for excess noise as the overall network expands with more ***,the feasibility of the experiment is based on the analysis of the theoretical model,noise analysis,and multiple techniques such as the particle filter and adaptive equalization algorithm used to suppress excess *** results show that each user can get a low level of excess noise and can achieve secret key rates of 546 kbps,535 kbps,522.5 kbps,and 512.5 kbps under a transmission distance of 10 km,respectively,with the finite-size block of 1×10~*** not only verifies the good performance but also provides the foundation for the future multi-user quantum downstream access networks.

关键词： quantum oscillator local

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Direct generation and detection of correlated photons with 3.2 um wavelength spacing

arXiv

引用

arXiv 2017年

作者： Sua, Yong Meng Fan, Heng Shahverdi, Amin Chen, Jia-Yang Huang, Yu-Ping Department of Physics and Engineering Physics Stevens Institute of Technology HobokenNJ07030 United States Center for Distributed Quantum Computing Stevens Institute of Technology HobokenNJ07030 United States Department of Electrical and Computer Engineering Stevens Institute of Technology HobokenNJ07030 United States

quantum correlated, highly non-degenerate photons can be used to synthesize disparate quantum nodes and link quantum processing over incompatible wavelengths, thereby constructing heterogeneous quantum systems for otherwise unattainable superior performance. Existing techniques for correlated photons have been concentrated in the visible and near-IR domains, with the photon pairs residing within one micron. Here, we demonstrate direct generation and detection of high-purity photon pairs at room temperature with 3.2 um wavelength spacing, one at 780 nm to match the rubidium D2 line, and the other at 3950 nm that falls in a transparent, low-scattering optical window for free space applications. The pairs are created via spontaneous parametric downconversion in a lithium niobate waveguide with specially designed geometry and periodic poling. The 780 nm photons are measured with a silicon avalanche photodiode, and the 3950 nm photons are measured with an upconversion photon detector using a similar waveguide, which attains 34% internal conversion efficiency. quantum correlation measurement yields a high coincidence-to-accidental ratio of 54, which indicates the strong correlation with the extremely non-degenerate photon pairs. Our system bridges existing quantum technology to the challenging mid-IR regime, where unprecedented applications are expected in quantum metrology and sensing, quantum communications, medical diagnostics, and so on. Copyright © 2017, The Authors. All rights reserved.

关键词： Photons

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Trion species-resolved quantum beats in MoSe2

arXiv

引用

arXiv 2017年

作者： Shepard, Gabriella D. Ardelean, Jenny V. Rhodes, Daniel A. Zhu, X.-Y. Hone, James C. Strauf, Stefan Department of Physics Stevens Institute of Technology HobokenNJ07030 United States Center for Distributed Quantum Computing Stevens Institute of Technology HobokenNJ07030 United States Department of Mechanical Engineering Columbia University New YorkNY10027 United States Department of Chemistry Columbia University New YorkNY10027 United States

Monolayer photonic materials offer a tremendous potential for on-chip optoelectronic devices. Their realization requires knowledge of optical coherence properties of excitons and trions that have so far been limited to nonlinear optical experiments carried out with strongly inhomogenously broadened material. Here we employ h-BN encapsulated and electrically gated MoSe2 to reveal coherence properties of trion-species directly in the linear optical response. Autocorrelation measurements reveal long dephasing times up to T2=1.16±0.05 ps for positively charged excitons. Gate dependent measurements provide evidence that the positively-charged trion forms via spatially localized hole states making this trion less prone to dephasing in the presence of elevated hole carrier concentrations. quantum beat signatures demonstrate coherent coupling between excitons and trions that have a dephasing time up to 0.6 ps, a two-fold increase over those in previous reports. A key merit of the prolonged exciton/trion coherences is that they were achieved in a linear optical experiment, and thus are directly relevant to applications in nanolasers, coherent control, and on-chip quantum information processing requiring long photon coherence. Copyright © 2017, The Authors. All rights reserved.

关键词： Excitons

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DrugProtKGE: Weakly Supervised Knowledge Graph Embedding for Highly-Effective Drug-Protein Interaction Representation

DrugProtKGE: Weakly Supervised Knowledge Graph Embedding for...

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IEEE International Conference on Bioinformatics and Biomedicine (BIBM)

作者： Yanlong Qiu Siqi Wang Xi Yang Xinyuan Qiu Chengkun Wu Yingbo Cui Canqun Yang Institute for Quantum Information & State Key Laboratory of High-Performance Computing College of Computer Science National University of Defense Technology Changsha P. R. China National Supercomputer Center in Tianjin Tianjin P. R. China National Key Laboratory of Parallel and Distributed Computing College of Computer Science National University of Defense Technology Changsha P. R. China Department of Biology and Chemistry College of Science National University of Defense Technology Changsha P. R. China

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