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Nonreciprocal unconventional photon blockade in a spinning optomechanical system

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Photonics Research 2019年第6期7卷 630-641页

作者： BAIJUN LI RAN HUANG XUNWEI XU adam miranowicz HUI JING Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications Hunan Normal University Changsha 410081 China Department of Applied Physics East China Jiaotong University Nanchang 330013 China Theoretical Quantum Physics Laboratory RIKEN Cluster for Pioneering ResearchWako-shi Saitama 351-0198 Japan Faculty of Physics Adam Mickiewicz University61-614 Poznan Poland

We propose how to achieve quantum nonreciprocity via unconventional photon blockade(UPB) in a compound device consisting of an optical harmonic resonator and a spinning optomechanical resonator. We show that, even with very weak single-photon nonlinearity, nonreciprocal UPB can emerge in this system, i.e., strong photon antibunching can emerge only by driving the device from one side but not from the other side. This nonreciprocity results from the Fizeau drag, leading to different splitting of the resonance frequencies for the optical counter-circulating modes. Such quantum nonreciprocal devices can be particularly useful in achieving backaction-free quantum sensing or chiral photonic communications.

关键词： spinning optomechanical system photon blockade

Ideal Quantum Nondemolition Readout of a Flux Qubit Without Purcell Limitations

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Ideal Quantum Nondemolition Readout of a Flux Qubit Without ...

Amyloid-β-induced disruption of axon-initial-segment mitochondria localization:consequences for TAU missorting in Alzheimer's disease pathology

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作者：王信 adam miranowicz Franco Nori 西安交通大学 CEMS RIKEN Faculty of Physics Adam Mickiewicz University Physics Department The University of Michigan

Dispersive coupling based on the large-detuned Rabi model is widely used for quantum nondemolition（QND） qubit readout in quantum computation. However, the measurement speed and fidelity are usually significantly limited by the three Purcell effects: Purcell decay, critical photon numbers, and qubit-dependent Kerr nonlinearity. To avoid these effects, we propose how to realize an ideal QND readout of a gradiometric flux qubit with a tunable gap via its direct dispersive coupling to a bound-tunable measurement resonator. We show that this novel readout mechanism is free of dipole-field interactions, and the qubit-QND measurement is not invaded by intracavity photons. Both qubit-readout speed and fidelity can break through the Purcell limitations. Moreover, this direct dispersive coupling can be conveniently turned on/off via an external control flux. We show how to extend this proposal tp a multi-qubit architecture for a joint qubit readout.

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Neural Regeneration Research 2025年第5期20卷 1407-1408页

作者： Daniel adam Felix Langerscheidt Hans Zempel Institute of Human Genetics University Hospital CologneCologneGermany Center for Molecular Medicine Cologne(CMMC) University of CologneCologneGermany

TAU is a neuronal microtubule-associated protein preferentially located in *** a battery of neurodegenerative diseases termed"tauopathies,"including Alzheimer's disease (AD),TAU is missorted and abnormally phosphorylated,leading to filamentous accumulations of hyperphosphorylated TAU,a pathological hallmark and potential disease driver of AD and related tauopathies (Zempel,2024).

关键词： Alzheimer tau diseases

Heterogeneity of mature oligodendrocytes in the central nervous system

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Neural Regeneration Research 2025年第5期20卷 1336-1349页

作者： Chao Weng adam M.R.Groh Moein Yaqubi Qiao-Ling Cui Jo Anne Stratton G.R.Wayne Moore Jack P.Antel Neuroimmunology Unit Montreal Neurological Institute-HospitalDepartment of Neurology and NeurosurgeryMcGill UniversityMontrealQCCanada Department of Neurology Renmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina

Mature oligodendrocytes form myelin sheaths that are crucial for the insulation of axons and efficient signal transmission in the central nervous *** evidence has challenged the classical view of the functionally static mature oligodendrocyte and revealed a gamut of dynamic functions such as the ability to modulate neuronal circuitry and provide metabolic support to *** the recognition of potential heterogeneity in mature oligodendrocyte function,a comprehensive summary of mature oligodendrocyte diversity is *** delve into early 20th-century studies by Robertson and Río-Hortega that laid the foundation for the modern identification of regional and morphological heterogeneity in mature ***,recent morphologic and functional studies call into question the long-assumed homogeneity of mature oligodendrocyte function through the identification of distinct subtypes with varying myelination ***,modern molecular investigations,employing techniques such as single cell/nucleus RNA sequencing,consistently unveil at least six mature oligodendrocyte subpopulations in the human central nervous system that are highly transcriptomically diverse and vary with central nervous system *** and disease related mature oligodendrocyte variation denotes the impact of pathological conditions such as multiple sclerosis,Alzheimer's disease,and psychiatric ***,caution is warranted when subclassifying mature oligodendrocytes because of the simplification needed to make conclusions about cell identity from temporally confined *** studies leveraging advanced techniques like spatial transcriptomics and single-cell proteomics promise a more nuanced understanding of mature oligodendrocyte *** research avenues that precisely evaluate mature oligodendrocyte heterogeneity with care to understand the mitigating influence of species,sex,central nervous system region,age,and disease,

关键词： aging central nervous system diseases electron microscopy heterogeneity immunohistochemistry myelin sheath natural history neuroglia oligodendroglia single-cell gene expression analysis

Effect of dietary fibre on the gastrointestinal microbiota during critical illness:A scoping review

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World Journal of Critical Care Medicine 2025年第1期14卷 49-59页

作者： Angajendra N Ghosh Calum J Walsh Matthew J Maiden Tim P Stinear adam M Deane Department of Intensive Care The Northern HospitalEpping 3076VictoriaAustralia Department of Microbiology and Immunology The Peter Doherty Institute for Infection and ImmunityMelbourne 3052VictoriaAustralia Department of Intensive Care The Royal Melbourne HospitalThe University of MelbourneParkville 3050VictoriaAustralia Department of Intensive Care Medicine The Royal Melbourne HospitalParkville 3050VictoriaAustralia

The systemic effects of gastrointestinal(GI)microbiota in health and during chronic diseases is increasingly *** strategies to modulate the GI microbiota during chronic diseases have demonstrated *** changes in dietary intake can rapidly change the GI microbiota,the impact of dietary changes during acute critical illness on the microbiota remain *** fibre is metabolised by carbohydrate-active enzymes and,in health,can alter GI *** aim of this scoping review was to describe the effects of dietary fibre supplementation in health and disease states,specifically during critical *** controlled trials and prospective cohort studies that include adults(>18 years age)and reported changes to GI microbiota as one of the study outcomes using non-culture methods,were *** show dietary fibres have an impact on faecal microbiota in health and *** fibre,inulin,has a marked and specific effect on increasing the abundance of faecal *** chain fatty acids produced by Bifidobacteria have been shown to be beneficial in other patient *** few trials have evaluated the effect of dietary fibre on the GI microbiota during critical *** research is necessary to establish optimal fibre type,doses,duration of intervention in critical illness.

关键词： Gastrointestinal microbiota Dietary fibre Health Critical illness Short chain fatty acids

Status and prospects for symmetric organic redox flow batteries

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Journal of Energy Chemistry 2025年第1期 125-143页

作者： Md Al Raihan C.adam Dyker Department of Chemistry University of New Brunswick

As environmental concerns from fossil fuel consumption intensify, large-scale energy storage becomes imperative for the integration of renewable sources like wind, hydro, and solar with the electrical *** flow batteries, particularly those employing organic molecules, are positioned as a key technology for this purpose. This review explores the growing field of symmetric organic redox flow batteries(ORFBs) within this context. Unlike traditional asymmetric designs based on unique active materials for each electrode, symmetric ORFBs involve a single bipolar species for both electrodes. This review highlights the benefits of a symmetric design, and categorizes five distinct classes of organic bipolar molecules used in both aqueous and non-aqueous solvents. By providing a comprehensive overview of their cell cycling and performance characteristics, the strengths and weaknesses of the diverse categories of bipolar molecules are highlighted for both solvent systems, as are opportunities for future development. This should guide new research directions and advance the development of practical symmetric ORFBs.

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Solid rocket propulsion technology for de-orbiting spacecraft

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Chinese Journal of Aeronautics 2022年第3期35卷 128-154页

作者： adam OKNINSKI Center of Space Technologies Lukasiewicz Research Network-Institute of AviationWarsaw 02-256Poland

This paper presents the topic of using solid rocket propulsion for de-orbiting spacecraft,in order to fulfil space debris mitigation *** benefits and disadvantages of using such means are discussed.A dedicated system can be implemented in the satellite design phase and shall be a key subsystem of platforms inserted into ***,semi-controlled and controlled de-orbit can be completed using solid rocket *** impact on the space debris environment is *** requirements for dedicated propellants and systems are *** the majority of presently developed rocket systems worldwide require high burn rates,several applications,including de-orbiting,benefit from solid propellants with decreased regression *** allows limiting spacecraft accelerations and loads during de-orbit ***,the requirement of minimising solid particle generation is *** technology from the Mercury and Gemini human spaceflight programmes,where de-orbit motors were used,is *** Soviet,American and Chinese film-return-capsule solid propellant retrorockets,enabling deorbit,are also presented.A detailed survey of current work worldwide on end-of-life disposal using solid propulsion is *** of developing dedicated systems are ***,an outlook on solid rocket motor utilisation for space debris mitigation is provided.

关键词： De-orbit De-orbiting technology End-of-life disposal Satellite propulsion system development Solid propellant Solid rocket motor Space debris mitigation Space traffic management

Proactive interburden fracturing using UIS drilling with validation monitoring

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International Journal of Mining Science and Technology 2021年第1期31卷 3-7页

作者： adam Lines Anglo American Grosvenor MineMoranbah 4744Australia

A series of gas inrush events occurred during development at Grosvenor Mine resulting in exposure to elevated levels of methane at the production face.A total of 22 gas inrush events occurred,with between 15 and 130 m3 of methane released during each *** presence of an undrained seam in the immediate floor,geotechnical characteristics of the floor,and the stress environment all contributed to these dynamic floor events,while the geological characteristics of the seam below,such as the seam thickness and ash content of 75%,prevented effective ***,events only occurred in headings mined parallel to the principal horizontal stress *** cut-throughs(C/T)perpendicular to the principal stress direction no events occurred,and higher methane levels were observed at the production *** solution to preventing the gas inrush events involved creating a conduit in the interburden between the mined seam and the seam in the immediate floor to allow the gas to be drained during the development of the headings,as occurred in the cut-throughs(cut-through and cross-cut are regional terms that are analogous).A series of underground inseam(UIS)holes were drilled using the directional drill rig with the aim of fracturing this interburden ahead of the face and promote floor failure to allow the gas to release *** floor fracturing was conducted using water pressure generated from a longwall salvage pump,with the current UIS drilling equipment retrofitted with a series of subs,packers and a fracturing *** packers and the fracturing tool were shifted to desired locations along the drilled UIS borehole to achieve the required *** fractures were monitored using a proving hole and with a HYDAC data logger attached to the salvage pack,with the results analysed on the surface to ensure connectivity to the working seam.

关键词： Gas drainage Floor fracking UIS drilling

Distributional Considerations for Transboundary Risk Governance of Environmental Threats

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International Journal of Disaster Risk Science 2018年第4期9卷 445-453页

作者： adam Rose Price School of Public Policy University of Southern California

Most policy analyses of both short-term and long-term disasters focus on aggregate impacts of their costs and the benefits of policy remedies. Distributional considerations relating to the costs of these disasters and the benefits of their risk management, however, are very important in many cases. This article examines two broad categories of cases in terms of distributional considerations. The first category is where transboundary considerations strongly affect risk governance, as in the case of climate change. The second relates to ordinary, short-term disasters, which include fewer, but still important, transboundary issues. Climate change policy requires information regarding the distribution of impacts and policy responses across countries because it is a global *** disasters involve transboundary considerations much less frequently, so the attention typically shifts to the distribution of benefits and costs within a jurisdiction. In both cases distributional information is needed to evaluate the equity of policies and to provide information for public participation in the policy process. This article offers modeling and policy approaches to address these issues.

关键词： Climate change Disasters Distributional effects Policy analysis Risk governance Transboundary impacts