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An 1% Hubble parameter estimation from LISA-Taiji gravitational wave observatory network

Credit: ©Science China Press
The Hubble parameter is one of the central parameters in the modern cosmology. Their values inferred from the late-time observations are systematically higher than those from the early-time measurements by about 10%. This is called the Hubble tension . To come to a robust conclusion, independent probes with accuracy at percent levels are crucial. With the self-calibration by the theory of general relativity, gravitational waves from compact binary coalescence open a completely novel observational window for Hubble parameter determination. Hence, it can shed some light on the Hubble tension. Depends on whether being associated with electromagnetic counterparts or not, gravitational wave events can be categorized into bright sirens and dark sirens. The future space-borne gravitational wave observatory network, such as the LISA-Taiji network, will be able to measure the gravitational wave signals in the Millihertz bands with unprecedented accuracy. ....

Qing Yang , Rong Gen Cai , Renjie Wang , Wen Hong Ruan , Zong Kuan Guo , Natl Sci Rev , குயிங் யாங் , நட்டில் அறிவியல் ரெவ் ,

Demonstration of the universal quantum error correcting code with superconducting qubits

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IMAGE: (a) Encoding quantum circuit of the five-qubit code. (b) Expectation values of 31 stabilizers for the encoded logical state |T> L. (c) Expectation values of logical Pauli operators and state fidelity.
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Credit: @Science China Press
Universal fault-tolerant quantum computing relies on the implementation of quantum error correction. An essential milestone is the achievement of error-corrected logical qubits that genuinely benefit from error correction, outperforming simple physical qubits. Although tremendous efforts have been devoted to demonstrate quantum error correcting codes with different quantum hardware, previous realizations are limited to be against certain types of errors or to prepare special logical states. It remains one of the greatest and also notoriously difficult challenges to realize a universal quantum error correcting code for more than a decade. ....

Shao Rong , Ming Gong , Xyu Xu , Jian Wei Pan , Shaowei Li , Cheng Zhi Peng , Yulin Wu , Xiongfeng Ma , Zhen Zhang , Futian Liang , Xiaobo Zhu , Jin Lin , Chui Deng , Youwei Zhao , Yunchao Liu , Shiyu Wang , Chen Zha , Simonc Benjamin , Qi Zhao , Anhui Initiative In Quantum Information Technologies , National Natural Science Foundation Of China , University Of Oxford , University Of Science , Chinese Academy Of Science , Technology Committee Of Shanghai Municipality , National Science ,

Self-assembly induced luminescence of Eu3+-complexes for bioimaging application

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IMAGE: Schematic illustration of the synthetic protocol of the self-assembly induced luminescence (SAIL) of Eu-complex and its bioimaging application.
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Credit: @Science China Press
The unique properties of rare earth (RE) complexes including ligand-sensitized energy transfer, fingerprint-like emissions and long-lived emissions, make them promising materials for many applications, such as optical encoding, luminescence imaging/sensing and time-resolved luminescence detection. In particularly, the use of RE luminescent materials for in vitro and in vivo imaging can easily eliminate the autofluorescence of organisms and any interference from background fluorescence. However, most RE complexes have poor solubility and stability in aqueous solution and their luminescence can be easily quenched by nearby X-H (X = O, N, C) oscillators, which limits their further applications in aqueous solutions and bioimaging. Consequently, improving luminesce ....

Xi Yang , Jina Zhang , Xia Feng , Li Juan Liang , Tao Wang , Pan Zhou , Chun Hua Yan , Yu Tang , National Natural Science Foundation Of China , Fund Project Of Guiding Scientific , Technological Innovation Development Of Gansu Province , National Natural Science Foundation , Special Fund Project , Guiding Scientific , Technological Innovation Development , Gansu Province , Xiao Xi Yang , Xiao Xia Feng , Mei Na Zhang , Natl Sci Rev , Chemistry Physics Materials Sciences , க்ஷி யாங் , நா ஜாங் , கிஷிய ஃபெங் , லி ஜுவான் லியாங் , தாவோ வாங் ,

Transients and synchronization are unified in ecological networks

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IMAGE: (a) The model of ecological network. Vertical dashed line denotes the reflection symmetry. (b) Representative time series of the predator populations. All patches are synchronized in phase. (c) A magnification.
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Credit: @Science China Press
Synchronization and transients are two fundamental phenomena in nonlinear and complex dynamical systems, and they also emerge ubiquitously in ecology and evolutionary biology. Synchronization is commonly observed in spatially extended ecological systems and is regarded as the dynamical basis for the emergence of ecological cycles and orders, yet there is little understanding of the underlying mechanism. Likewise, transient dynamics are fundamental to the conservation and management of ecological systems, yet the analysis of transient dynamics in spatiotemporal ecological systems remains a challenge. The two phenomena, which have been studied separately in the past, are unified in a recent study ....

United States , Wei Kong , Xingang Wang , Ying Cheng Lai , Alan Hastings , University Of California Davis , Arizona State University , National Science , Shaanxi Normal University , Huawei Fan , Ling Wei Kong , Natl Sci Rev , ஒன்றுபட்டது மாநிலங்களில் , வெய் காங் , யிங் செங் லாய் , ஆலன் அவசரம் , பல்கலைக்கழகம் ஆஃப் கலிஃபோர்னியா டேவிஸ் , அரிசோனா நிலை பல்கலைக்கழகம் , தேசிய அறிவியல் , ஷாங்க்ஷி சாதாரண பல்கலைக்கழகம் , ஹூவாய் விசிறி , லிங் வெய் காங் , நட்டில் அறிவியல் ரெவ் ,