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Demonstration of Maxwell demon-assisted Einstein-Podolsky-Rosen steering via superconducting quantum processor

Authors :
Z. T. Wang
Ruixia Wang
Peng Zhao
Z. H. Yang
Yun-Hao Shi
Kaixuan Huang
Kai Xu
Yong-Sheng Zhang
Heng Fan
S. P. Zhao
Meng-Jun Hu
Haifeng Yu
Source :
Physical Review Research, Vol 6, Iss 3, p L032073 (2024)
Publication Year :
2024
Publisher :
American Physical Society, 2024.

Abstract

The concept of Maxwell demon plays an essential role in connecting thermodynamics and information theory, while entanglement and nonlocality are fundamental features of quantum theory. Given the rapid advancements in the field of quantum information science, there is a growing interest and significance in investigating the connection between Maxwell demon and quantum correlation. The majority of research endeavors thus far have been directed toward the extraction of work from quantum correlation through the utilization of Maxwell demon. Recently, a novel concept called Maxwell demon-assisted Einstein-Podolsky-Rosen (EPR) steering has been proposed, which suggests that it is possible to simulate quantum correlation by doing work. This seemingly counterintuitive conclusion is attributed to the fact that Alice and Bob need classical communication during EPR steering task, a requirement that does not apply in the Bell test. In this study, we demonstrate Maxwell demon-assisted EPR steering with superconducting quantum circuits. By compiling and optimizing a quantum circuit to be implemented on a 2D superconducting chip, we were able to achieve a steering parameter of S_{2}=0.770±0.005 in the case of two measurement settings, which surpasses the classical bound of 1/sqrt[2] by 12.6 standard deviations. In addition, experimental observations have revealed a linear correlation between the nonlocality demonstrated in EPR steering and the work done by the demon. Considering the errors in practical operation, the experimental results are highly consistent with theoretical predictions. Our findings not only suggest the presence of a Maxwell demon loophole in the EPR steering, but also contribute to a deeper comprehension of the interplay between quantum correlation, information theory, and thermodynamics.

Subjects

Subjects :
Physics
QC1-999

Details

Language :
English
ISSN :
26431564
Volume :
6
Issue :
3
Database :
Directory of Open Access Journals
Journal :
Physical Review Research
Publication Type :
Academic Journal
Accession number :
edsdoj.6bfe20f8814446a6a54f2d0506754c4e
Document Type :
article
Full Text :
https://doi.org/10.1103/PhysRevResearch.6.L032073