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20032026
Showing 2025 · quant-phShow all

23 papers · 2 filters

quant-ph2025

Experimental Joint Estimation of Phase and Phase Diffusion via Deterministic Bell Measurements

Ben Wang, Minghao Mi, Huangqiuchen Wang +2

Accurate phase estimation plays a pivotal role in quantum metrology, yet its precision is significantly affected by noise, particularly phase-diffusive noise caused by phase drift.…

quant-ph2025★ 3 cited

Experimental Efficient Source-Independent Quantum Conference Key Agreement

Wen-Ji Hua, Yi-Ran Xiao, Yu Bao +2

Multipartite entanglement enables secure group key distribution among multiple users while providing immunity against hacking attacks targeting source devices, thereby realizing so…

quant-ph2025★ 14 cited

Experimental Efficient Source-Independent Quantum Secret Sharing against Coherent Attacks

Yi-Ran Xiao, Hua-Lei Yin, Wen-Ji Hua +2

Source-independent quantum secret sharing (SI QSS), while essential for secure multiuser cryptographic operations in quantum networks, faces significant implementation challenges s…

quant-ph2025★ 4 cited

Quantum relaxometry for detecting biomolecular interactions with single NV centers

Min Li, Qi Zhang, Xi Kong +14

The investigation of biomolecular interactions at the single-molecule level has emerged as a pivotal research area in life science, particularly through optical, mechanical, and el…

quant-ph2025★ 1 cited

Nonclassical correlations and quadrature squeezing of photons in anisotropic quantum Rabi-Stark model

Yong-Xin Zhang, Chen Wang, Qing-Hu Chen

This study investigates nonclassical effects of photons in the anisotropic quantum Rabi-Stark model by using a quantum dressed master equation. We analyze second- and higher-order…

quant-ph2025★ 1 cited

-symmetric two-photon quantum Rabi models

Yi-Cheng Wang, Jiong Li, Qing-Hu Chen

We investigate two non-Hermitian two-photon quantum Rabi models (tpQRM) that exhibit symmetry: the biased tpQRM (btpQRM), in which the qubit bias is purely imaginary…

quant-ph2025★ 8 cited

Violation of Bell Inequality with Unentangled Photons

Kai Wang, Zhaohua Hou, Kaiyi Qian +6

Violation of local realism via Bell inequality - a profound and counterintuitive manifestation of quantum theory that conflicts with the prediction of local realism - is viewed to…

quant-ph2025★ 1 cited

Variational quantum algorithms with invariant probabilistic error cancellation on noisy quantum processors

Yulin Chi, Hongyi Shi, Wen Zheng +8

In the noisy intermediate-scale quantum era, emerging classical-quantum hybrid optimization algorithms, such as variational quantum algorithms (VQAs), can leverage the unique chara…

quant-ph2025★ 3 cited

Time-bin encoded quantum key distribution over 120 km with a telecom quantum dot source

Jipeng Wang, Joscha Hanel, Zenghui Jiang +11

Quantum key distribution (QKD) with deterministic single photon sources has been demonstrated over intercity fiber and free-space channels. The previous implementations relied main…

quant-ph2025★ 2 cited

Experimental demonstration of generalized quantum fluctuation theorems in the presence of coherence

Hui Li, Jie Xie, Hyukjoon Kwon +3

Fluctuation theorems have elevated the second law of thermodynamics to a statistical realm by establishing a connection between time-forward and time-reversal probabilities, provid…

quant-ph2025

A Geometric Quantum Speed Limit: Theoretical Insights and Photonic Implementation

Qianyi Wang, Ben Wang, Jun Wang +1

Quantum mechanics imposes a lower bound on the time required for a quantum system to reach certain given targets. In this paper, from a geometric perspective, we introduce a new qu…

quant-ph2025★ 4 cited

Quantum Geometric Tensor for Mixed States Based on the Covariant Derivative

Qianyi Wang, Ben Wang, Jun Wang +1

The quantum geometric tensor (QGT) is a fundamental quantity for characterizing the geometric properties of quantum states and plays an essential role in elucidating various physic…

quant-ph2025★ 11 cited

Observation of Genuine High-dimensional Multi-partite Non-locality in Entangled Photon States

Xiao-Min Hu, Cen-Xiao Huang, Nicola d'Alessandro +10

Quantum information science has leaped forward with the exploration of high-dimensional quantum systems, offering greater potential than traditional qubits in quantum communication…

quant-ph2025

Switching Dynamics of Metastable Open Quantum Systems

Ya-Xin Xiang, Weibin Li, Zhengyang Bai +1

Classical metastability manifests as noise-driven switching between disjoint basins of attraction and slowing down of relaxation, quantum systems like qubits and Rydberg atoms exhi…

quant-ph2025★ 2 cited

Critical Spectrum and Quantum Criticality in the Two-Photon Rabi-Stark Model

Jiong Li, Qing-Hu Chen

We investigate the spectral properties and quantum criticality of the two-photon Rabi-Stark model. Using the exact solution of this model, we rigorously derive a condition for comp…

quant-ph2025★ 1 cited

Information-theoretically secure quantum timestamping with one-time universal hashing

Ming-Yang Li, Chen-Xun Weng, Wen-Bo Liu +2

Accurate and tamper-resistant timestamps are essential for applications demanding verifiable chronological ordering, such as legal documentation and digital intellectual property p…

quant-ph2025★ 10 cited

Quantum Teleportation from Telecom Photons to Erbium-ion Ensembles

Yu-Yang An, Qian He, Wenyi Xue +5

To realize a quantum internet, the distribution of quantum states via quantum teleportation with quantum memories is a key ingredient. Being compatible with existing fiber networks…

quant-ph2025★ 2 cited

Search of High-Frequency Variations of Fundamental Constants Using Spin-based Quantum Sensors

Xi Kong, Yuke Zhang, Chenyu Ji +6

This study presents a novel method using spin quantum sensors to explore temporal variations of fundamental constants, significantly expanding the frequency range and providing con…

quant-ph2025★ 7 cited

Entanglement distribution over metropolitan fiber using an on-chip broadband polarization entangled photon source

Zi-Heng Jiang, Yikai Chen, Wenhan Yan +10

Entangled photon pairs are of crucial importance in quantum networks. For the future demands of large-scale and secure quantum communication, integrated photon sources are highly e…

quant-ph2025★ 11 cited

Postselection-Free Cavity-Enhanced Narrow-Band Orbital Angular Momentum Entangled Photon Source

Pei Wan, Wen-Zheng Zhu, Yan-Chao Lou +5

Cavity-enhanced spontaneous parametric down-conversion (SPDC) provides a significant way to produce 10 MHz narrow-band photon pairs, which matches the bandwidth of photon for…

quant-ph2025

Two-particle quantum interference in a nonlinear optical medium: a witness of timelike indistinguishability

Chao Chen, Shu-Tian Xue, Yu-Peng Shi +8

The Hong-Ou-Mandel effect is a paradigmatic quantum phenomenon demonstrating the interference of two indistinguishable photons that are linearly coupled at a 50:50 beam splitter. H…

quant-ph2025

Experimental asymmetric relativistic zero-knowledge proofs with unconditional security

Chen-Xun Weng, Ming-Yang Li, Nai-Rui Xu +6

Zero-knowledge proofs (ZKPs) are widely applied in digital economies, such as cryptocurrencies and smart contracts, for establishing trust and privacy between untrusted parties. Cl…

quant-ph2025★ 2 cited

Experimentally validated quantum-secure federated learning over a multi-user quantum network

Zhi-Ping Liu, Xiao-Yu Cao, Hao-Wen Liu +6

Federated learning enables decentralized, privacy-preserving training but remains vulnerable to privacy leakage in the quantum era. Quantum federated learning (QFL) offers a promis…