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arXiv 2108.07252hep-th
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Proca理论中的电路复杂性

Circuit complexity in proca theory

Kun Meng, Meihua Deng, Jiaqiang Zhao, Lianzhen Cao

摘要:

本文用Nielsen方法和Fubini-Study(FS)度量方法研究了Proca理论中的电路复杂性。我们把场放在晶格上,得到一个正则化的理论,并通过采用适当的坐标得到基态。我们用Nielsen方法计算了基态和热场双态的复杂度,发现其复杂度呈对数函数增长。我们对Proca场进行了量子化,通过对相应的参考态施加幺正电路算符,得到了近似的基态和TFD态。利用FS度量计算了回路长度,并根据相应的几何空间给出了回路的最小长度。TFD状态的复杂度随时间线性增长。

英文摘要:

In this paper, we study circuit complexity in Proca theory with Nielsen's approach and Fubini-Study (FS) metric approach. We place the fields on a lattice to gain a regularized theory, and obtain the ground state by adopting proper coordinates. We calculate complexities of the ground and thermofield double (TFD) states with Nielsen's approach, complexity of the TFD state is found to grows like a logarithmic function. We quantize the Proca fields and give the approximate ground state and TFD state by acting unitary circuit operators on the associated reference states. The circuit lengths are calculated with FS metric, the minimal lengths are given according to the associated geometric spaces. The complexity of TFD state is found to grows linearly with time.

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