Zobrazeno 1 - 10
of 2 694
pro vyhledávání: '"An, Xiangjing"'
Autor:
Liu, Hongfeng, Liu, Xiangjing, Chen, Qian, Qiu, Yixian, Vedral, Vlatko, Nie, Xinfang, Dahlsten, Oscar, Lu, Dawei
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 measuring the probe qubit. The scattering circuit thereby implements a coarse
Externí odkaz:
http://arxiv.org/abs/2411.06052
Autor:
Liu, Hongfeng, Liu, Xiangjing, Chen, Qian, Qiu, Yixian, Vedral, Vlatko, Nie, Xinfang, Dahlsten, Oscar, Lu, Dawei
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 determined without intervention in quantum systems. Intervention is com
Externí odkaz:
http://arxiv.org/abs/2411.06051
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 eigenvalues are key indicators of temporal correlations. Conventional methods
Externí odkaz:
http://arxiv.org/abs/2409.02470
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 accepting another thermodynamical cost? We answer this in the positive, descri
Externí odkaz:
http://arxiv.org/abs/2406.08054
Autor:
Xi, Cheng, Liu, Xiangjing, Liu, Hongfeng, Huang, Keyi, Long, Xinyue, Ebler, Daniel, Nie, Xinfang, Dahlsten, Oscar, Lu, Dawei
Publikováno v:
Phys. Rev. Lett. 133, 040401 (2024)
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 to thermalizing channels. Quantum-switching thermal channels has been
Externí odkaz:
http://arxiv.org/abs/2406.01951
Continuous p-dispersion problems with and without boundary constraints are NP-hard optimization problems with numerous real-world applications, notably in facility location and circle packing, which are widely studied in mathematics and operations re
Externí odkaz:
http://arxiv.org/abs/2405.16618
Publikováno v:
Phys. Rev. E 108, 054119 (2023)
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, L052105 (2023)], we derived a general bound on annealing performance by co
Externí odkaz:
http://arxiv.org/abs/2311.10424
Publikováno v:
Phys. Rev. E 108, L052105 (2023)
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. In this Letter, we analyse the conditions for which annealing is appro
Externí odkaz:
http://arxiv.org/abs/2311.10422
Publikováno v:
Phys. Rev. A 109, 032219 (2024)
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 problem. We consider conditions on the initial and final states that are s
Externí odkaz:
http://arxiv.org/abs/2311.07086
Publikováno v:
Physical Review D 108, 124074 (2023)
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 model are quantized using the loop techniques. The physical Hilbert spa
Externí odkaz:
http://arxiv.org/abs/2307.11222