Entropy Computing, A Paradigm for Optimization in Open Photonic Systems
Lac Nguyen, Mohammad-Ali Miri, R. Joseph Rupert, Wesley Dyk, Sam Wu, Nick Vrahoretis, Irwin Huang, Milan Begliarbekov, Nicholas Chancellor, Uchenna Chukwu, Pran… 展开作者
Lac Nguyen, Mohammad-Ali Miri, R. Joseph Rupert, Wesley Dyk, Sam Wu, Nick Vrahoretis, Irwin Huang, Milan Begliarbekov, Nicholas Chancellor, Uchenna Chukwu, Pranav Mahamuni, Cesar Martinez-Delgado, David Haycraft, Carrie Spear, Joel Russell Huffman, Yong Meng Sua, Yu-Ping Huang
备注：
Accepted in Communications Physics, latest arXiv version includes supplemental material as part of main document. Changes to author names and title in final submission to ensure exact match with journal version
Finding better solutions to combinatorial optimization problems could have a large positive impact on many real-world application areas, such as logistics. For this reason, significant efforts have been made to design novel optimisation paradigms. Here we show an early instance of such paradigm in an optical setting, the entropy computing paradigm. Specifically, we experimentally demonstrate the feasibility of entropy computing by building a hybrid photonic-electronic computer that uses optical measurement and feedback to solve non-convex optimization problems. The system functions by using temporal photonic modes to create qudits in order to encode probability amplitudes in the time-frequency degree of freedom of a photon. This scheme, when coupled with with electronic interconnects, allows us to encode an arbitrary Hamiltonian into the system and solve non-convex continuous variables and combinatorial optimization problems. We show that the proposed entropy computing paradigm can act as a scalable and versatile platform for tackling a large range of NP-hard optimization problems.
General framework for anticoncentration and linear cross-entropy benchmarking in photonic quantum advantage experiments
HUN-REN Wigner Research Centre for Physics（匈牙利科学院维格纳物理研究中心）；Eötvös Loránd University（厄特沃什·罗兰大学）；University of Helsinki（赫尔辛基大学）；Algorithmiq Ltd（Algorithmiq有限公司）；Center for Quantum Enabled-Computing, Center for Theoretical Physics of the Polish Academy of Sciences（波兰科学院理论物理中心量子使能计算中心）
Using the type-I SPDC process in BBO nonlinear crystal (NLC), we generate a polarization-entangled state near to the maximally-entangled Bell-state with high-visibility (high-brightness) $ 98.50 \pm 1.33 ~ \% $ ($ 87.71 \pm 4.45 ~ \% $) for HV (DA) basis. We calculate the CHSH version of the Bell inequality, as a nonlocal realism test, and find a strong violation from the classical physics or any hidden variable theory (HVT), $ S= 2.71 \pm 0.10 $. Via measuring the coincidence count (CC) rate in the SPDC process, we obtain the quantum efficiency of single-photon detectors (SPDs) around $ (25.5…
Recent progress in nonlinear optical materials and microresonators has brought quantum computing with bulk optical nonlinearities into the realm of possibility. This platform is of great interest, not only because photonics is an obvious choice for quantum networks, but also because it may be the only feasible route to quantum information processing at room temperature. We introduce a paradigm for room-temperature photonic quantum logic that significantly simplifies the realization of various quantum circuits, and in particular, of error correction. It uses only the strongest available bulk no…
Korea Institute of Science and Technology (KIST)（韩国科学技术院）；Korea University of Science and Technology (UST)（韩国科学技术院）；Seoul National University（首尔大学）；The University of Sydney（悉尼大学）；Korea Institute for Advanced Study（韩国高等研究院）；Imperial College London（帝国理工学院）
The second law of nonequilibrium thermodynamics within the open system paradigm (a small system coupled to one or multiple baths) is derived. This is done by showing positivity of entropy production for arbitrary Hamiltonian dynamics for a large class of initial states. Using the recently introduced notion of observational entropy, shortcomings of previous approaches are overcome. I apologize that the actual abstract of the manuscript is longer than the arXiv guidelines allow and therefore not displayed here.
