429 citations · 1.8k across the 36 of their papers we have counts for
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hep-th2018★ 10 cited
Perturbation Theory for the Logarithm of a Positive Operator
Nima Lashkari, Hong Liu, Srivatsan Rajagopal
In various contexts in mathematical physics one needs to compute the logarithm of a positive unbounded operator. Examples include the von Neumann entropy of a density matrix and th…
hep-th2018★ 38 cited
Modular Flow of Excited States
Nima Lashkari, Hong Liu, Srivatsan Rajagopal
We develop new techniques for studying the modular and the relative modular flows of general excited states. We show that the class of states obtained by acting on the vacuum (or a…
hep-th2018★ 45 cited
Constraining Quantum Fields using Modular Theory
Nima Lashkari
Tomita-Takesaki modular theory provides a set of algebraic tools in quantum field theory that is suitable for the study of the information-theoretic properties of states. For every…