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arXiv 1405.6471hep-thmath-phmath.MP
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模糊球及其单极的量子熵

Quantum Entropy for the Fuzzy Sphere and its Monopoles

Nirmalendu Acharyya, Nitin Chandra, Sachindeo Vaidya

摘要:

利用广义玻色子,在$SU(2)$的可约表示中构造了模糊球$S_F^2$和$S_F^2$上的磁单极.相应的量子态是利用GNS构造自然获得的。我们证明了在观测量代数的交换子中存在一个突现的非阿贝尔么正规范对称性。量子态必然是混合的,并且具有非零的冯诺伊曼熵,它在双随机马尔可夫映射下单调增加。熵的最大值与构成模糊球之下的可约表示的不可约表示的退化有一个简单的关系。

英文摘要:

Using generalized bosons, we construct the fuzzy sphere $S_F^2$ and monopoles on $S_F^2$ in a reducible representation of $SU(2)$. The corresponding quantum states are naturally obtained using the GNS-construction. We show that there is an emergent non-abelian unitary gauge symmetry which is in the commutant of the algebra of observables. The quantum states are necessarily mixed and have non-vanishing von Neumann entropy, which increases monotonically under a bistochastic Markov map. The maximum value of the entropy has a simple relation to the degeneracy of the irreps that constitute the reducible representation that underlies the fuzzy sphere.

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