23 Result(s)
-
Article
A wireless optoelectronic probe to monitor oxygenation in deep brain tissue
Real-time detection of tissue oxygenation in the nervous system is crucial in neuroscience studies and clinical diagnostics. Complementary to blood oxygenation levels, the partial pressure of oxygen in brain t...
-
Article
Open AccessTwo-dimensional phase diagram of the charge density wave in doped CsV3Sb5
Kagome superconductors AV3Sb5 (A = K, Rb and Cs) have attracted much recent attention due to the coexistence of multiple exotic orders. Among them, the charge density wave (CDW) order has been shown to host vario...
-
Article
Open AccessSemi-device-independent quantum random number generator with a broadband squeezed state of light
Random numbers are a basic ingredient of simulation algorithms and cryptography, and play a significant part in computer simulation and information processing. One prominent feature of a squeezed light is its ...
-
Article
On-chip optoelectronic logic gates operating in the telecom band
Optoelectronic logic gates (OELGs) are promising building blocks for next-generation logic circuits and potential applications in light detection and ranging, machine vision and real-time video analysis. On-ch...
-
Article
Open Access1002 km twin-field quantum key distribution with finite-key analysis
Quantum key distribution (QKD) holds the potential to establish secure keys over long distances. The distance of point-to-point QKD secure key distribution is primarily impeded by the transmission loss inheren...
-
Article
Open AccessVery-large-scale integrated quantum graph photonics
Graphs have provided an expressive mathematical tool to model quantum-mechanical devices and systems. In particular, it has been recently discovered that graph theory can be used to describe and design quantum...
-
Article
Open AccessEntangling motional atoms and an optical loop at ambient condition
The observation of quantum entanglement in macroscopic matters has implications in the fundamental studies of quantum mechanics, as well as the implementations of quantum information technologies, such as quan...
-
Article
Highly bright and stable single-crystal perovskite light-emitting diodes
Metal-halide perovskite light-emitting diodes (PeLEDs) have attracted great interest because of their tunable emission wavelength, narrow emission bandwidth and high external quantum efficiency. However, PeLED...
-
Article
High-rate quantum key distribution exceeding 110 Mb s–1
Quantum key distribution (QKD) can provide fundamentally proven secure communication. Towards application, the secret key rate (SKR) is a key figure of merit for any QKD system. The SKR has so far been limited...
-
Article
Perovskite solar cells based on spiro-OMeTAD stabilized with an alkylthiol additive
Spiro-OMeTAD, one of the most widely used hole-transport materials (HTMs) in optoelectronic devices, typically requires chemical do** with a lithium compound (LiTFSI) to attain sufficient conductivity and ef...
-
Article
Open AccessNonreciprocal charge transport in topological kagome superconductor CsV3Sb5
Nonreciprocal charge transport phenomena are widely studied in two-dimensional superconductors, which demonstrate unidirectional-anisotropy magnetoresistances as a result of symmetry breaking. Here, we report ...
-
Article
Quantifying Quantum Non-Markovianity Based on Two Kinds of Coherence Measures
Non-Markovianity measures of open quantum systems are given based on two kinds of quantum coherence measures, which are defined from the perspective of norms and fidelity, respectively. These non-Markovianity ...
-
Article
Open AccessMultipartite entanglement of billions of motional atoms heralded by single photon
Quantum theory does not prevent entanglement from being created and observed in macroscopic physical systems, in reality however, the accessible scale of entanglement is still very limited due to decoherence e...
-
Article
Twin-field quantum key distribution over a 511 km optical fibre linking two distant metropolitan areas
The basic principle of quantum mechanics1 guarantees the unconditional security of quantum key distribution (QKD)2–6 at the cost of forbidding the amplification of a quantum state. As a result, and despite remark...
-
Article
Efficient telecom-to-visible spectral translation through ultralow power nonlinear nanophotonics
The ability to spectrally translate lightwave signals in a compact, low-power platform is at the heart of the promise of nonlinear nanophotonic technologies. For example, a device to connect the telecommunicat...
-
Article
A Novel E-payment Protocol Implented by Blockchain and Quantum Signature
Based on blockchain and quantum signature, a novel E-payment protocol is proposed in this paper. Our E-payment protocol could protect user’s anonymity as the traditional E-payment systems do, and also have unc...
-
Article
Open AccessDirect observation of broadband nonclassical states in a room-temperature light–matter interface
Nonclassical state is an essential resource for quantum-enhanced communication, computing and metrology to outperform their classical counterpart. The nonclassical states that can operate at high bandwidth and...
-
Article
Precision Mass Measurement with Optomechanically Induced Transparency in an Optomechanical System
We present a scheme for all-optical precision mass sensing with squeezed field in an optomechanical system in terms of optomechanically induced transparency (OMIT). We demonstrate that the splitting of the two...
-
Article
High-efficiency multiphoton boson sampling
Boson sampling is considered as a strong candidate to demonstrate ‘quantum computational supremacy’ over classical computers. However, previous proof-of-principle experiments suffered from small photon number ...
-
Article
Solution-processed organic tandem solar cells with power conversion efficiencies >12%
Careful selection of small-molecule materials provides solution-processed tandem organic solar cells with a boost in efficiency.
