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82 papers
Tunable Chaos in the Finite Mean SYK Model
Arkaprava Mukherjee, Sumilan Banerjee, Sandip P. Trivedi +1
The complex Sachdev-Ye-Kitaev (SYK) model, featuring fermions with all-to-all interactions, serves as a dual paradigm for understanding non-Fermi liquid behavior and the holographi…
JT Gravity in de Sitter Space and the Problem of Time
Kanhu Kishore Nanda, Sunil Kumar Sake, Sandip P. Trivedi
We discuss the canonical quantisation of JT gravity in de Sitter space, following earlier work by Henneaux, with particular attention to the problem of time. Choosing the dilaton a…
Sparse random matrices and Gaussian ensembles with varying randomness
Takanori Anegawa, Norihiro Iizuka, Arkaprava Mukherjee +2
We study a system of qubits with a random Hamiltonian obtained by drawing coupling constants from Gaussian distributions in various ways. This results in a rich class of system…
Entanglement Entropy in Internal Spaces and Ryu-Takayanagi Surfaces
Sumit R. Das, Anurag Kaushal, Gautam Mandal +3
We study minimum area surfaces associated with a region, , of an internal space. For example, for a warped product involving an asymptotically space and an internal space…
Aspects of Jackiw-Teitelboim Gravity in Anti-de Sitter and de Sitter spacetime
Upamanyu Moitra, Sunil Kumar Sake, Sandip P. Trivedi
We discuss JT gravity in AdS and dS space in the second order formalism. For the pure dS JT theory without matter, we show that the path integral gives rise in general to the Hartl…
Jackiw-Teitelboim Gravity in the Second Order Formalism
Upamanyu Moitra, Sunil Kumar Sake, Sandip P. Trivedi
We formulate the path integral for Jackiw-Teitelboim gravity in the second order formalism working directly with the metric and the dilaton. We consider the theory both in Anti-de…