2024/09/25 by Sihao Wu, Sihao 思浩 Wu 吴, Chen Qian +5 · 3 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Quantum, superfluid, helium dynamics #Radioactive Decay and Measurement Techniques
paper · doi:10.1088/0256-307x/41/11/110301
Abstract The rapid developments of quantum information science (QIS) have opened up new avenues for exploring fundamental physics. Quantum nonlocality, a key aspect for distinguishing quantum information from classical one, has undergone extensive examinations in particles’ decays through the violation of Bell-type inequalities. Despite these advancements, a comprehensive framework based on quantum information theory for particle interaction is still lacking. Trying to close this gap, we introduce a generalized quantum measurement description for decay processes of spin-1/2 hyperons. We validate this approach by aligning it with established theoretical calculations and apply it to the joint decay of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mi>Λ</mml:mi> <mml:mover accent="true"> <mml:mi>Λ</mml:mi> <mml:mo stretchy="false">¯</mml:mo> </mml:mover> </mml:mrow> </mml:math> pairs. We employ quantum simulation to observe the violation of Clauser–Horne–Shimony–Holt inequalities in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:msub> <mml:mi>η</mml:mi> <mml:mi>c</mml:mi> </mml:msub> <mml:mo>/</mml:mo> <mml:msub> <mml:mi>χ</mml:mi> <mml:mrow> <mml:mi>c</mml:mi> <mml:mn>0</mml:mn> </mml:mrow> </mml:msub> <mml:mo>→</mml:mo> <mml:mi>Λ</mml:mi> <mml:mover accent="true"> <mml:mi>Λ</mml:mi> <mml:mo stretchy="false">¯</mml:mo> </mml:mover> </mml:mrow> </mml:math> processes. Our generalized measurement description is adaptable and can be extended to a variety of high energy processes, including decays of vector mesons, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mi>J</mml:mi> <mml:mo>/</mml:mo> <mml:mi>ψ</mml:mi> <mml:mo>,</mml:mo> <mml:mi>ψ</mml:mi> <mml:mo stretchy="false">(</mml:mo> <mml:mn>2</mml:mn> <mml:mi>S</mml:mi> <mml:mo stretchy="false">)</mml:mo> <mml:mo>→</mml:mo> <mml:mi>Λ</mml:mi> <mml:mover accent="true"> <mml:mi>Λ</mml:mi> <mml:mo stretchy="false">¯</mml:mo> </mml:mover> </mml:mrow> </mml:math> , in the Beijing Spectrometer III (BESIII) experiment at the Beijing Electron Positron Collider (BEPC). The methodology developed in this study can be applied to quantum correlation and information processing in fundamental interactions.