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arXiv 2005.11389hep-thmath-phmath.MPquant-ph
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广义纠缠、电荷和缠绕

Generalized Entanglement, Charges and Intertwiners

Keiichiro Furuya, Nima Lashkari, Shoy Ouseph

摘要:

内对称量子系统中荷/反荷粒子在纠缠表面自发产生纠缠对,使纠缠理论更加丰富。我们称这些对创建运营商的双局域缠绕,因为他们在对称群的表示理论中发挥的作用。我们定义了一种广义的纠缠熵测度,它是在一个可观测量子空间的限制下对被擦除信息的测度。我们认为,正确的纠缠措施在收费的存在下是两项的总和;一个测量的纠缠的电荷中性运营商,和其他测量的贡献的双本地缠绕。我们的表达式是明确定义的晶格模型以及在量子场论(QFT)。我们使用Tomita Takesaki模块化理论来突出QFT和晶格模型之间的差异,并讨论了扩展的代数QFT,导致的带电模式的因式分解。

英文摘要:

The entanglement theory in quantum systems with internal symmetries is rich due to the spontaneous creation of entangled pairs of charge/anti-charge particles at the entangling surface. We call these pair creation operators the bi-local intertwiners because of the role they play in the representation theory of the symmetry group. We define a generalized measure of entanglement entropy as a measure of information erased under restriction to a subspace of observables. We argue that the correct entanglement measure in the presence of charges is the sum of two terms; one measuring the entanglement of charge-neutral operators, and the other measuring the contribution of the bi-local intertwiners. Our expression is unambiguously defined in lattice models as well in quantum field theory (QFT). We use the Tomita-Takesaki modular theory to highlight the differences between QFT and lattice models, and discuss an extension of the algebra of QFT that leads to a factorization of the charged modes.

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