443 citations · 1.6k across the 23 of their papers we have counts for
23 papers
Sensitivity Bounds of Multiparameter Metrology at Thermal Equilibrium
Zhu Cao
Quantum metrology aims to enhance measurement precision beyond the classical limit by leveraging quantum resources. Unlike multi-parameter dynamic quantum metrology, many questions…
Sequential device-independent certification of indefinite causal order
Zhu Cao
Indefinite causal order has found numerous applications in quantum computation, quantum communication, and quantum metrology. Before its usage, the quality of the indefinite causal…
Deep Ising Born Machine
Zhu Cao
A quantum neural network (QNN) is a method to find patterns in quantum data and has a wide range of applications including quantum chemistry, quantum computation, quantum metrology…
Detection loophole in quantum causality and its countermeasures
Zhu Cao
Quantum causality violates classical intuitions of cause and effect and is a unique quantum feature different from other quantum phenomena such as entanglement and quantum nonlocal…
Constant-round Multi-party Quantum Computation for Constant Parties
Zhu Cao
One of the central themes in classical cryptography is multi-party computation, which performs joint computation on multiple participants' data while maintaining data privacy. The…
Counterfactual universal quantum computation
Zhu Cao
Universal quantum computation is usually associated with interaction among two-level quantum subsystems, as this interaction is commonly viewed as a necessity to achieve universal…
Quantum Go Machine
Lu-Feng Qiao, Jun Gao, Zhi-Qiang Jiao +9
Go has long been considered as a testbed for artificial intelligence. By introducing certain quantum features, such as superposition and collapse of wavefunction, we experimentally…
Discrete-phase-randomized measurement-device-independent quantum key distribution
Zhu Cao
Measurement-device-independent quantum key distribution removes all detector-side attacks in quantum cryptography, and in the meantime doubles the secure distance. The source side,…
Experimental Test of Tracking the King Problem
Cheng-Qiu Hu, Jun Gao, Lu-Feng Qiao +7
In quantum theory, the retrodiction problem is not as clear as its classical counterpart because of the uncertainty principle of quantum mechanics. In classical physics, the measur…
Uncertainty conservation relations: theory and experiment
Hengyan Wang, Zhihao Ma, Shengjun Wu +8
As a very fundamental principle in quantum physics, uncertainty principle has been studied intensively via various uncertainty inequalities. Based on the information measure introd…
Operational one-to-one mapping between coherence and entanglement measures
Huangjun Zhu, Zhihao Ma, Zhu Cao +2
We establish a general operational one-to-one mapping between coherence measures and entanglement measures: Any entanglement measure of bipartite pure states is the minimum of a su…
Tight detection efficiency bounds of Bell tests in no-signaling theories
Zhu Cao, Tianyi Peng
No-signaling theories, which can contain nonlocal correlations stronger than classical correlations but limited by the no-signaling condition, have deepened our understanding of th…
Experimental quantum data locking
Yang Liu, Zhu Cao, Cheng Wu +13
Classical correlation can be locked via quantum means--quantum data locking. With a short secret key, one can lock an exponentially large amount of information, in order to make it…
Trustworthiness of measurement devices in round-robin differential-phase-shift quantum key distribution
Zhu Cao, Zhen-Qiang Yin, Zheng-Fu Han
Round-robin differential-phase-shift quantum key distribution (RRDPS QKD) has been proposed to raise the noise tolerability of the channel. However, in practice, the measurement de…
Loss-tolerant measurement-device-independent quantum random number generation
Zhu Cao, Hongyi Zhou, Xiongfeng Ma
Quantum random number generators (QRNGs) output genuine random numbers based upon the uncertainty principle. A QRNG contains two parts in general --- a randomness source and a read…
Quantum random number generation
Xiongfeng Ma, Xiao Yuan, Zhu Cao +2
Quantum physics can be exploited to generate true random numbers, which play important roles in many applications, especially in cryptography. Genuine randomness from the measureme…
Source-independent quantum random number generation
Zhu Cao, Hongyi Zhou, Xiao Yuan +1
Quantum random number generators can provide genuine randomness by appealing to the fundamental principles of quantum mechanics. In general, a physical generator contains two parts…
Experimental Passive Round-Robin Differential Phase-Shift Quantum Key Distribution
Jian-Yu Guan, Zhu Cao, Yang Liu +7
In quantum key distribution (QKD), the bit error rate is used to estimate the information leakage and hence determines the amount of privacy amplification --- making the final key…
Intrinsic randomness as a measure of quantum coherence
Xiao Yuan, Hongyi Zhou, Zhu Cao +1
Based on the theory of quantum mechanics, intrinsic randomness in measurement distinguishes quantum effects from classical ones. From the perspective of states, this quantum featur…
Practical round-robin differential-phase-shift quantum key distribution
Zhen Zhang, Xiao Yuan, Zhu Cao +1
The security of quantum key distribution (QKD) relies on the Heisenberg uncertainty principle, with which legitimate users are able to estimate information leakage by monitoring th…
Discrete-phase-randomized coherent state source and its application in quantum key distribution
Zhu Cao, Zhen Zhang, Hoi-Kwong Lo +1
Coherent state photon sources are widely used in quantum information processing. In many applications, such as quantum key distribution (QKD), a coherent state is functioned as a m…
Randomness Requirement on CHSH Bell Test in the Multiple Run Scenario
Xiao Yuan, Zhu Cao, Xiongfeng Ma
The Clauser-Horne-Shimony-Holt inequality test is widely used as a mean of invalidating the local deterministic theories and a tool of device independent quantum cryptographic task…
Direct Counterfactual Communication with Single Photons
Yuan Cao, Yu-Huai Li, Zhu Cao +7
Intuition from our everyday lives gives rise to the belief that information exchanged between remote parties is carried by physical particles. Surprisingly, in a recent theoretical…