Exact generalized partition function of 2D CFTs at large central charge

Exact generalized partition function of 2D CFTs at large central charge
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大中心电荷下二维 CFT 的精确广义配分函数

DOI:
10.1007/jhep05(2019)077
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发表时间:
2019
影响因子:
5.4
通讯作者:
Pavlenko, Kirill
Pavlenko, Kirill
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Dymarsky, Anatoly;Pavlenko, Kirill

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讨论了高qKdV电荷修饰的热柱面上二维CFTs的广义配分函数。我们提出在大中心电荷极限下,qKdV电荷可以因式分解,使得广义配分函数可以用辅助非相互作用玻色子的形式重写。广义自由能的显式表达式很容易用玻色子谱来表示,它可以从qKdV电荷的常规热期望值中推导出来。换句话说,辅助非相互作用玻色子的图像允许将热一点函数扩展到完整的非微扰广义配分函数。我们利用最近获得的穿透性结果验证了前七个qKdV电荷的这一猜想,并找到了辅助玻色子质量的相应贡献。我们通过猜想玻色子的全谱进一步扩展了这些结果,并找到了在大中心电荷极限下作为无限化学势塔函数的广义配分函数的精确表达式。
We discuss generalized partition function of 2d CFTs on thermal cylinder decorated by higher qKdV charges. We propose that in the large central charge limit qKdV charges factorize such that generalized partition function can be rewritten in terms of auxiliary non-interacting bosons. The explicit expression for the generalized free energy is readily available in terms of the boson spectrum, which can be deduced from the conventional thermal expectation values of qKdV charges. In other words, the picture of the auxiliary non-interacting bosons allows extending thermal one-point functions to the full non-perturbative generalized partition function. We verify this conjecture for the first seven qKdV charges using recently obtained pertrubative results and find corresponding contributions to the auxiliary boson masses. We further extend these results by conjecturing the full spectrum of bosons and find an exact expression for the generalized partition function as a function of infinite tower of chemical potentials in the limit of large central charge.
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