15 citations · 53 across the 14 of their papers we have counts for
14 papers
Generalised Probabilistic Theories
Zujin Wen, Zihan Wang, Xiangjing Liu +1
We give an introduction to research associated with the generalised probabilistic theories framework, also known as the convex framework. States are real vectors representing lists…
Reversing Heat Flow by Coherence in a Multipartite Quantum System
Keyi Huang, Qi Zhang, Xiangjing Liu +12
The second law of thermodynamics dictates that heat flows spontaneously from a high-temperature entity to a lower-temperature one. Yet, recent advances have demonstrated that quant…
Spatial Incompatibility Witnesses for Quantum Temporal Correlations
Xiangjing Liu, Harshit Verma, Yunlong Xiao +2
We introduce a witness-based framework for certifying quantum temporal correlations via the pseudo-density matrix (PDM) formalism, which is a spatiotemporal generalization of the d…
No Practical Quantum Broadcasting: Even Virtually
Yunlong Xiao, Xiangjing Liu, Zhenhuan Liu
Quantum information cannot be broadcast -- an intrinsic limitation imposed by quantum mechanics. However, recent advances in virtual operations offer new insights into the no-broad…
Experimental Virtual Quantum Broadcasting
Yuxuan Zheng, Xinfang Nie, Hongfeng Liu +3
The quantum no-broadcasting theorem states that it is fundamentally impossible to perfectly replicate an arbitrary quantum state, even if correlations between the copies are allowe…
Quantum causal inference via scattering circuits in NMR
Hongfeng Liu, Xiangjing Liu, Qian Chen +5
We report NMR scattering circuit experiments that reveal causal structure. The scattering circuit involves interacting a probe qubit with the system of interest and finally measuri…
Experimental demonstration of quantum causal inference via noninvasive measurements
Hongfeng Liu, Xiangjing Liu, Qian Chen +5
We probe the foundations of causal structure inference experimentally. The causal structure concerns which events influence other events. We probe whether causal structure can be d…
Certifying Quantum Temporal Correlation via Randomized Measurements: Theory and Experiment
Hongfeng Liu, Zhenhuan Liu, Shu Chen +3
We consider the certification of temporal quantum correlations using the pseudo-density matrix (PDM), an extension of the density matrix to the time domain, where negative eigenval…
Quantum harvester enables energy transfer without randomness transfer or dissipation
Fei Meng, Junhao Xu, Xiangjing Liu +1
We consider a foundational question in energy harvesting: given a partly random energy source, is it possible to extract the energy without also transferring randomness or acceptin…
Experimental Validation of Enhanced Information Capacity by Quantum Switch in Accordance with Thermodynamic Laws
Cheng Xi, Xiangjing Liu, Hongfeng Liu +6
We experimentally probe the interplay of the quantum switch with the laws of thermodynamics. The quantum switch places two channels in a superposition of orders and may be applied…
Bound on annealing performance from stochastic thermodynamics, with application to simulated annealing
Yutong Luo, Yi-Zheng Zhen, Xiangjing Liu +2
Annealing is the process of gradually lowering the temperature of a system to guide it towards its lowest energy states. In an accompanying paper [Luo et al. Phys. Rev. E 108, L052…
General limit to thermodynamic annealing performance
Yutong Luo, Yi-Zheng Zhen, Xiangjing Liu +2
Annealing has proven highly successful in finding minima in a cost landscape. Yet, depending on the landscape, systems often converge towards local minima rather than global ones.…
Inferring the arrow of time in quantum spatiotemporal correlations
Xiangjing Liu, Qian Chen, Oscar Dahlsten
We consider how to tell the time-ordering associated with measurement data from quantum experiments at two times and any number of qubits. We define an arrow of time inference prob…
Conformally Invariant Brans-Dicke Loop Quantum Cosmology: A Quantum Geometric Model of Linking Theory
Chun-Yen Lin, Xiangjing Liu, Yongge Ma +1
The loop quantization of the conformal Brans-Dicke cosmology is explored in the spatially flat and Bianchi-I setting. The scalar and conformal constraints governing the canonical m…