Guang-Ping He
A scheme is proposed which stores classical data in 4-state quantum registers. It can achieve the following goal: the classical data can always be read unambiguously, while the quantum registers cannot be copied. Therefore the data provider can always distinguish the original quantum registers from piracy copies. Examples of application are also given.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
继续探索
The Role of piracy in quantum proofs
本文开创反盗版量子证明系统研究，定义并构造了针对谕示问题及NP的候选方案，同时通过研究可克隆变体解决QMA与QMA(2)之争，并为QMA与QCMA问题提供新思路。
Formulating cryptographic definitions to protect against software piracy is an important research direction that has not received much attention. Since natural definitions using classical cryptography are impossible to achieve (as classical programs can always be copied), this directs us towards using techniques from quantum computing. The seminal work of Aaronson [CCC'09] introduced the notion of quantum copy-protection precisely to address the problem of software anti-piracy. However, despite being one of the most important problems in quantum cryptography, there are no provably secure solut…
Antiblockade Quantum Batteries
针对量子电池中阻塞效应阻碍能量积累的问题，提出基于亮-暗相互作用和等间距缀饰暗态的反阻塞充电协议，实现至少20倍能量存储增强，并可在坏腔极限下实现超扩展充电特性。
An elementary quantum network operation involves storing a qubit state in an atomic quantum memory node, and then retrieving and transporting the information through a single photon excitation to a remote quantum memory node for further storage or analysis. Implementations of quantum network operations are thus conditioned on the ability to realize such matter-to-light and/or light-to-matter quantum state mappings. Here, we report generation, transmission, storage and retrieval of single quanta using two remote atomic ensembles. A single photon is generated from a cold atomic ensemble at Site …
Uncertainty relations lie at the very core of quantum mechanics, and form the cornerstone of essentially all quantum cryptographic applications. In particular, they play an important role in cryptographic protocols in the bounded-quantum-storage model, where proving the security of all existing protocols ultimately reduces to bounding such relations. Yet, very little is known about such uncertainty relations for more than two measurements. Here, we prove optimal entropic uncertainty relations for anti-commuting binary observables for the Shannon entropy, and nearly optimal relations for the co…
Broadband quantum memories hold great promise as multiplexing elements in future photonic quantum information protocols. Alkali vapour Raman memories combine high-bandwidth storage, on-demand read-out, and operation at room temperature without collisional fluorescence noise. However, previous implementations have required large control pulse energies and suffered from four-wave mixing noise. Here we present a Raman memory where the storage interaction is enhanced by a low-finesse birefringent cavity tuned into simultaneous resonance with the signal and control fields, dramatically reducing the…
Device-independent uncloneable encryption
本研究提出一种多密钥可解密的不可克隆加密变体，实现了设备无关安全，可用于构造量子货币，经修改还能得到无需量子随机谕言机、具备完美反盗版安全的单比特单解密者加密方案。
Highly nonclassical quantum states of light, characterized by Wigner functions with negative values, have been created so far only in a heralded fashion. In this case, the desired output emerges rarely and randomly from a quantum-state generator. An important example is the heralded production of high-purity single-photon states, typically based on some nonlinear optical interaction. In contrast, on-demand single-photon sources were also reported, exploiting the quantized level structure of matter systems. These sources, however, lead to highly impure output states, composed mostly of vacuum. …
Quantum Energy Storage versus Heat-to-Work Conversion in an Interacting Spin System
该研究以各向异性海森堡哈密顿量描述的两量子比特系统为工作介质，对比其作为量子电池和量子奥托热机的性能，发现偶极相互作用可提升量子电池储能能力却降低热机最大功，揭示二者互补性及自旋相互作用对量子能量转换的调控作用。
High-accuracy disposable micro-optical anti-counterfeiting labels based on single-molecule quantum coherence
本文提出一种基于单分子量子相干的一次性微光学防伪标签方法，结合喷墨打印与频域成像，通过实验、模拟和神经网络验证，实现识别准确率超过99.995%的高精度防伪。
The idea of quantum state storage is generalized to describe the coherent transfer of quantum information through a coherent data bus. In this universal framework, we comprehensively review our recent systematical investigations to explore the possibility of implementing the physical processes of quantum information storage and state transfer by using quantum spin systems, which may be an isotropic antiferromagnetic spin ladder system or a ferromagnetic Heisenberg spin chain. Our studies emphasize the physical mechanisms and the fundamental problems behind the various protocols for the storage…
Light Storage in Light Cages: A Scalable Platform for Multiplexed Quantum Memories
本研究提出了一种基于3D纳米印刷空芯波导的光笼量子记忆平台，实现了数百纳秒的光子存储，并展示了多路复用量子记忆的潜力。
Quantum control and signal enhancement exploiting the Stokes-anti-Stokes coherence
本文提出一种理论框架，研究斯托克斯与反斯托克斯散射过程的相干耦合，揭示了无法单独实现的干涉现象。通过散射相互作用模型，展示了经典驱动和系统线宽如何相干连接两个通道，实现相位控制的干涉，从而实现量子信息存储与传输的相干控制及信号增强。
We analyze theoretically how to use the radiation pressure coupling between a mechanical oscillator and an optical cavity field to generate in a heralded way a single quantum of mechanical motion (a Fock state), and release on-demand the stored excitation as a single photon. Starting with the oscillator close to its ground state, a laser pumping the upper motional sideband leads to dynamical backaction amplification and to the creation of correlated photon-phonon pairs. The detection of one Stokes photon thus projects the macroscopic oscillator into a single-phonon Fock state. The non-classica…
扫码添加微信好友，提出您的宝贵建议 👇
💡 备注请填写：网站反馈
发表机构由 AI 从论文文本抽取，如发现错误，欢迎反馈修正建议。