Facing the challenge of achieving the goal of carbon neutrality,China is decoupling the currently close dependence of its economy on coal use.The energy supply and demand decarbonization has substantial influence on t...Facing the challenge of achieving the goal of carbon neutrality,China is decoupling the currently close dependence of its economy on coal use.The energy supply and demand decarbonization has substantial influence on the resilience of the coal supply.However,a general understanding of the precise impact of energy decarbonization on the resilience of the coal energy supply is still lacking.Here,from the perspective of network science,we propose a theoretical framework to explore the resilience of the coal market of China.We show that the processes of increasing the connectivity and the competition between the coal enterprises,which are widely believed to improve the resilience of the coal market,can undermine the sustainability of the coal supply.Moreover,our results reveal that the policy of closing small-sized coal mines may not only reduce the safety accidents in the coal production but also improve the resilience of the coal market network.Using our model,we also suggest a few practical policies for minimizing the systemic risk of the coal energy supply.展开更多
Advancements in quantum optics and squeezed light generation have revolutionized various fields of quantum science over the past three decades,with notable applications such as gravitational wave detection.Here,we ext...Advancements in quantum optics and squeezed light generation have revolutionized various fields of quantum science over the past three decades,with notable applications such as gravitational wave detection.Here,we extend the use of squeezed light to the realm of ultrafast quantum science.We demonstrate the generation of the shortest ultrafast synthesized quantum light pulses spanning 0.33 to 0.73 PHz by a degenerate four-wave mixing nonlinear process.Experimental metrology results confirm that these pulses exhibit amplitude squeezing,which is consistent with theoretical predictions.Moreover,we observe the temporal dynamics of amplitude uncertainty of the squeezed light,demonstrating that quantum uncertainty of light is controllable and tunable in real time.Additionally,we demonstrate control over the quantum state of light by switching between amplitude and phase squeezing.Our ability to generate and manipulate ultrafast,squeezed,synthesized light waveforms with attosecond resolution unlocks exciting possibilities for quantum technologies,including petahertz-scale secure quantum communication,quantum computing,and ultrafast spectroscopy.As an example,we introduce an attosecond quantum encryption protocol leveraging squeezed synthesized light for secure digital communication at unprecedented speeds.This work paves the way for exploring quantum uncertainty dynamics and establishes the foundation for the emerging ultrafast and attosecond quantum science fields.展开更多
基金funded by the National Science Foundation of China(Grant nos.12271519,22120102001,61703079,and 11925103)the Postdoctoral Science Foundation of China(Grant nos.2017M621860 and 2019T120476)+1 种基金the 2nd Xplore Prize sponsored by the Tencent Foundation and the Natural Science Foundation of Hebei Province(Grant no.E2020402075)the STCSM(Grant No.2021SHZDZX0103).
文摘Facing the challenge of achieving the goal of carbon neutrality,China is decoupling the currently close dependence of its economy on coal use.The energy supply and demand decarbonization has substantial influence on the resilience of the coal supply.However,a general understanding of the precise impact of energy decarbonization on the resilience of the coal energy supply is still lacking.Here,from the perspective of network science,we propose a theoretical framework to explore the resilience of the coal market of China.We show that the processes of increasing the connectivity and the competition between the coal enterprises,which are widely believed to improve the resilience of the coal market,can undermine the sustainability of the coal supply.Moreover,our results reveal that the policy of closing small-sized coal mines may not only reduce the safety accidents in the coal production but also improve the resilience of the coal market network.Using our model,we also suggest a few practical policies for minimizing the systemic risk of the coal energy supply.
基金funded by the Gordon and Betty Moore Foundation Grant(GBMF 11476)to M.Hassansupported by the Air Force Office of Scientific Research under award number FA9550-22-1-0494+8 种基金support from:European Research Council AdG NOQIAMCIN/AEI(PGC20180910.13039/501100011033,CEX2019-000910 S/10.13039/501100011033Plan National STAMEENA PID2022-139099NB)project funded by MCIN/AEI/10.13039/501100011033the“European Union Next Generation EU/PRTR”(PRTR-C17.I1),FPI)QUANTERA DYNAMITE PCI2022-132919,Fundació CellexFundació Mir-PuigFundació CellexFundació Mir-Puig.
文摘Advancements in quantum optics and squeezed light generation have revolutionized various fields of quantum science over the past three decades,with notable applications such as gravitational wave detection.Here,we extend the use of squeezed light to the realm of ultrafast quantum science.We demonstrate the generation of the shortest ultrafast synthesized quantum light pulses spanning 0.33 to 0.73 PHz by a degenerate four-wave mixing nonlinear process.Experimental metrology results confirm that these pulses exhibit amplitude squeezing,which is consistent with theoretical predictions.Moreover,we observe the temporal dynamics of amplitude uncertainty of the squeezed light,demonstrating that quantum uncertainty of light is controllable and tunable in real time.Additionally,we demonstrate control over the quantum state of light by switching between amplitude and phase squeezing.Our ability to generate and manipulate ultrafast,squeezed,synthesized light waveforms with attosecond resolution unlocks exciting possibilities for quantum technologies,including petahertz-scale secure quantum communication,quantum computing,and ultrafast spectroscopy.As an example,we introduce an attosecond quantum encryption protocol leveraging squeezed synthesized light for secure digital communication at unprecedented speeds.This work paves the way for exploring quantum uncertainty dynamics and establishes the foundation for the emerging ultrafast and attosecond quantum science fields.
