论文标题
限制纠缠的两分系统中的新物理：Top-Quark，Tau-Lepton和Photon Pairs
Constraining new physics in entangled two-qubit systems: top-quark, tau-lepton and photon pairs
论文作者
论文摘要
量子纠缠的测量可以为超出标准模型以外的物理提供新的，最敏感的探针。我们利用在山相凸起的顶级旋转状态的同意，以限制顶级夸克和Gluons之间的耦合中的磁性偶极子术语，$τ$ -Lepton的旋转状态与$τ$ -Lepton的互动状态和$τ$ -Lepton成对或两photons旋转的状态或两杆状态与Higgs boson con con confern confern confern confern conferny confise and con conferny confersy confersy confere and con confere and confise。这四个示例显示了新方法的力量及其局限性。我们表明，在顶级Quark和$τ$ -Lepton对生产横截面的纠缠差异可以比先前从总横截面或经典相关性估计的差异更好。取而代之的是，即使在存在CP奇数耦合的情况下，Higgs玻色子衰减中的最终状态仍然最大地纠缠，并且不能用于在新物理学上设置界限。我们讨论了所有四个过程中对贝尔的不平等的侵犯。
The measurement of quantum entanglement can provide a new and most sensitive probe to physics beyond the Standard Model. We use the concurrence of the top-quark pair spin states produced at colliders to constrain the magnetic dipole term in the coupling between top quark and gluons, that of $τ$-lepton pairs spin states to bound contact interactions and that of $τ$-lepton pairs or two-photons spin states from the decay of the Higgs boson in trying to distinguish between CP-even and odd couplings. These four examples show the power of the new approach as well as its limitations. We show that differences in the entanglement in the top-quark and $τ$-lepton pair production cross sections can provide constraints better than those previously estimated from total cross sections or classical correlations. Instead, the final states in the decays of the Higgs boson remain maximally entangled even in the presence of CP odd couplings and cannot be used to set bounds on new physics. We discuss the violation of Bell inequalities featured in all four processes.
