首页|Experimental Investigation of Lee-Yang Criticality Using Non-Hermitian Quantum System

Experimental Investigation of Lee-Yang Criticality Using Non-Hermitian Quantum System

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Lee-Yang theory clearly demonstrates where the phase transition of many-body systems occurs and the asymptotic behavior near the phase transition using the partition function under complex parameters.The complex parameters make the direct investigation of Lee-Yang theory in practical systems challenging.Here we construct a non-Hermitian quantum system that can correspond to the one-dimensional Ising model with imaginary parameters through the equality of partition functions.By adjusting the non-Hermitian parameter,we successfully obtain the partition function under different imaginary magnetic fields and observe the Lee-Yang zeros.We also observe the critical behavior of free energy in vicinity of Lee-Yang zero that is consistent with theoretical prediction.Our work provides a protocol to study Lee-Yang zeros of the one-dimensional Ising model using a single-qubit non-Hermitian system.

蓝子桁、刘文权、伍旸、叶翔宇、杨哲森、段昌奎、王亚、荣星

展开 >

CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences,University of Science and Technology of China,Hefei 230026,China

CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China

School of Science,Beijing University of Posts and Telecommunications,Beijing 100876,China

Kavli Institute for Theoretical Sciences,Chinese Academy of Sciences,Beijing 100190,China

Hefei National Laboratory,University of Science and Technology of China,Hefei 230088,China

展开 >

国家重点研发计划国家自然科学基金中国科学院项目Innovation Program for Quantum Science and TechnologyAnhui Initiative in Quantum Information Technologies中国科学院青年创新促进会项目中央高校基本科研业务费专项Beijing University of Posts and Telecommunications Innovation Group

2021YFB320280012174373GJJSTD202000012021ZD0302200AHY050000

2024

10.1088/0256-307X/41/5/050301

中国物理快报(英文版)
中国科学院物理研究所,中国物理学会

中国物理快报(英文版)

CSTPCDEI
影响因子：0.515
ISSN：0256-307X
年,卷(期)：2024.41(5)
  • 23