Single-pixel imaging(SPI)through complex media remains challenging.In this paper,we report high-resolution common-path SPI with dual polarization using random-frequency-encoded time sequences in complex environments w...Single-pixel imaging(SPI)through complex media remains challenging.In this paper,we report high-resolution common-path SPI with dual polarization using random-frequency-encoded time sequences in complex environments where the illumination and detection paths are severely distorted.By leveraging a common-path optical configuration with orthogonal polarization states,a series of dynamic scaling factors can be corrected.The designed random-frequency encoding scheme disperses scattering-induced noise into artifacts to be simply removed.It is demonstrated in optical experiments that the proposed method is feasible and effective to reconstruct highresolution object images in complex environments.The proposed method does not require complex optical components and prior knowledge about scattering media,providing a robust solution for high-resolution optical imaging in complex scenarios where the illumination and detection paths are severely distorted at the same time.展开更多
Large-scale quantum networks require dynamic and resource-efficient solutions to reduce system complexity with maintained security and performance to support growing number of users over large distances.Current encodi...Large-scale quantum networks require dynamic and resource-efficient solutions to reduce system complexity with maintained security and performance to support growing number of users over large distances.Current encoding schemes including time-bin,polarization,and orbital angular momentum,suffer from the lack of reconfigurability and thus scalability issues.Here,we demonstrate the first-time implementation of frequency-bin-encoded entanglement-based quantum key distribution and a reconfigurable distribution of entanglement using frequency-bin encoding.Specifically,we demonstrate a novel scalable frequency-bin basis analyzer module that allows for a passive random basis selection as a crucial step in quantum protocols,and importantly equips each user with a single detector rather than four detectors.This minimizes massively the resource overhead,reduces the dark count contribution,vulnerability to detector side-channel attacks,and the detector imbalance,hence providing an enhanced security.Our approach offers an adaptive frequency-multiplexing capability to increase the number of channels without hardware overhead,enabling increased secret key rate and reconfigurable multi-user operations.In perspective,our approach enables dynamic resource-minimized quantum key distribution among multiple users across diverse network topologies,and facilitates scalability to large-scale quantum networks.展开更多
Single-pixel imaging(SPI)is a promising technology for optical imaging beyond the visible spectrum,where commercial cameras are expensive or unavailable.However,limitations such as slow pattern projection rates and ti...Single-pixel imaging(SPI)is a promising technology for optical imaging beyond the visible spectrum,where commercial cameras are expensive or unavailable.However,limitations such as slow pattern projection rates and time-consuming reconstruction algorithms hinder its throughput for real-time imaging.Consequently,conventional SPI is inadequate for high-speed,high-resolution tasks.To address these challenges,we developed an ultrahigh-throughput single-pixel complex-field microscopy(SPCM)system utilizing frequency-comb acousto-optic coherent encoding(FACE).This system enables real-time complex-field monitoring in the non-visible domain.Operating at 1030 nm,our system achieves a record-high space-bandwidth-time product(SBP-T)of 1.3×10^(7),surpassing previous SPCM(~10^(4)),SPI(~10^(5)),and even certain types of commercial near-infrared cameras(~10^(6)).It supports real-time streaming at 1000 Hz with a frame size of 80×81 pixels and a lateral resolution of 3.76μm across an approximately 300μm field of view.We validated the system by imaging dynamic transparent scenes,including microfluidics,live microorganisms,chemical reactions,as well as imaging through scattering media.This advancement offers a superior solution for high-speed,high-resolution complex-field imaging beyond the visible spectrum,significantly enhancing SPI performance across various applications.展开更多
The Atri intracellular calcium oscillations model was extended, and two new models were established. Furthermore, a unified model of the protein phosphorylation driven by cytosolic calcium oscillations was constructed...The Atri intracellular calcium oscillations model was extended, and two new models were established. Furthermore, a unified model of the protein phosphorylation driven by cytosolic calcium oscillations was constructed. The numerical results obtained verified related experimental conclusions. And the analytical expressions of intracellular calcium spiral and target waves in the Xenopus laevis oocyte were obtained, resulting in velocity and waveform of calcium solitary pulse wave were found.展开更多
基金National Natural Science Foundation of China(62405256)Hong Kong Research Grants Council General Research Fund(15224921,15223522,15237924)+2 种基金Hong Kong Research Grants Council Collaborative Research Fund(C5047-24G)Basic and Applied Basic Research Foundation of Guangdong Province(2023A1515010831,2025A1515011411)The Hong Kong Polytechnic University(1-CDJA,1-WZ4M).
文摘Single-pixel imaging(SPI)through complex media remains challenging.In this paper,we report high-resolution common-path SPI with dual polarization using random-frequency-encoded time sequences in complex environments where the illumination and detection paths are severely distorted.By leveraging a common-path optical configuration with orthogonal polarization states,a series of dynamic scaling factors can be corrected.The designed random-frequency encoding scheme disperses scattering-induced noise into artifacts to be simply removed.It is demonstrated in optical experiments that the proposed method is feasible and effective to reconstruct highresolution object images in complex environments.The proposed method does not require complex optical components and prior knowledge about scattering media,providing a robust solution for high-resolution optical imaging in complex scenarios where the illumination and detection paths are severely distorted at the same time.
基金Open Access funding enabled and organized by Projekt DEAL.
文摘Large-scale quantum networks require dynamic and resource-efficient solutions to reduce system complexity with maintained security and performance to support growing number of users over large distances.Current encoding schemes including time-bin,polarization,and orbital angular momentum,suffer from the lack of reconfigurability and thus scalability issues.Here,we demonstrate the first-time implementation of frequency-bin-encoded entanglement-based quantum key distribution and a reconfigurable distribution of entanglement using frequency-bin encoding.Specifically,we demonstrate a novel scalable frequency-bin basis analyzer module that allows for a passive random basis selection as a crucial step in quantum protocols,and importantly equips each user with a single detector rather than four detectors.This minimizes massively the resource overhead,reduces the dark count contribution,vulnerability to detector side-channel attacks,and the detector imbalance,hence providing an enhanced security.Our approach offers an adaptive frequency-multiplexing capability to increase the number of channels without hardware overhead,enabling increased secret key rate and reconfigurable multi-user operations.In perspective,our approach enables dynamic resource-minimized quantum key distribution among multiple users across diverse network topologies,and facilitates scalability to large-scale quantum networks.
基金supported in part by the National Natural Science Foundation of China(12404380,12325408,12274129,12374274,12274139,62175069,62175066,62475070,12474404)the Fundamental and Applied Basic Research Project of Guangzhou(2024A04J2001)+2 种基金the Guangdong Basic and Applied Basic Research Foundation(2023A1515110742,2023B1515120044,2024B1515020051)Shanghai Municipal Education Commission(2024AI01007)Science and Technology Commission of Shanghai Municipality(QNKJ2024031).
文摘Single-pixel imaging(SPI)is a promising technology for optical imaging beyond the visible spectrum,where commercial cameras are expensive or unavailable.However,limitations such as slow pattern projection rates and time-consuming reconstruction algorithms hinder its throughput for real-time imaging.Consequently,conventional SPI is inadequate for high-speed,high-resolution tasks.To address these challenges,we developed an ultrahigh-throughput single-pixel complex-field microscopy(SPCM)system utilizing frequency-comb acousto-optic coherent encoding(FACE).This system enables real-time complex-field monitoring in the non-visible domain.Operating at 1030 nm,our system achieves a record-high space-bandwidth-time product(SBP-T)of 1.3×10^(7),surpassing previous SPCM(~10^(4)),SPI(~10^(5)),and even certain types of commercial near-infrared cameras(~10^(6)).It supports real-time streaming at 1000 Hz with a frame size of 80×81 pixels and a lateral resolution of 3.76μm across an approximately 300μm field of view.We validated the system by imaging dynamic transparent scenes,including microfluidics,live microorganisms,chemical reactions,as well as imaging through scattering media.This advancement offers a superior solution for high-speed,high-resolution complex-field imaging beyond the visible spectrum,significantly enhancing SPI performance across various applications.
文摘The Atri intracellular calcium oscillations model was extended, and two new models were established. Furthermore, a unified model of the protein phosphorylation driven by cytosolic calcium oscillations was constructed. The numerical results obtained verified related experimental conclusions. And the analytical expressions of intracellular calcium spiral and target waves in the Xenopus laevis oocyte were obtained, resulting in velocity and waveform of calcium solitary pulse wave were found.
