报告题目：Covariant phase space with boundaries

报告人：吴洁强 博士（麻省理工学院理论物理研究中心）

报告时间：2019年7月16号（周二）15:00 - 16:00

报告地点：天津大学新校区理学院256

报告摘要：

The covariant phase space method of Iyer, Lee, Wald, and Zoupas gives an elegant way to understand the Hamiltonian dynamics of Lagrangian field theories without breaking covariance. The original literature however does not systematically treat total derivatives and boundary terms, which has led to some confusion about how exactly to apply the formalism in the presence of boundaries. We here give an algorithmic procedure for applying the covariant phase space formalism to field theories with spatial boundaries. With our formalism, we derive the Hamiltonian for theories with diffeomorphism symmetries, only assuming that the configurations satisfy equations of motion and boundary conditions, which is consistent with previous results. If time permitted, I will illustrate this formalism by an interesting model Jackiw-Teitolboim gravity, where we can explicitly solve the phase space and symplectic form. With this structure, we can rederive the traversable wormhole effect.

报告人简历：吴洁强博士，现任麻省理工学院理论物理研究中心博士后，于北京大学物理学院获得本科与博士学位。

代表作：

[1] Covariant Phase Space with Boundaries, Daniel Harlow, Jie-qiang Wu, arXiv: 1906.08616

[2] Floquet conformal field theory, Xueda Wen, Jie-qiang Wu, arXiv: 1802.10537

[3] Witten diagram for Torus Conformal Block, P.Kraus, A.Maloney, H.Maxfield, G.S.Seng, J-q.Wu, JHEP09(2017)149 arXiv: 1706.00047

[4] Holographic Entanglement Entropy for a Large Class of States in 2D CFT, Bin Chen, Jie-qiang Wu, JHEP09(2016)015 arXiv: 1605.06753

[5] One Loop partition function in AdS_3/CFT_2, Bin Chen, Jie-qiang Wu, JHEP12(2015)109, arXiv: 1509.02062

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