75 citations · 156 across the 7 of their papers we have counts for
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Operator Complexity for Quantum Scalar Fields and Cosmological Perturbations
S. Shajidul Haque, Chandan Jana, Bret Underwood
We calculate the operator complexity for the displacement, squeeze and rotation operators of a quantum harmonic oscillator. The complexity of the time-dependent displacement operat…
Saturation of Thermal Complexity of Purification
S. Shajidul Haque, Chandan Jana, Bret Underwood
We purify the thermal density matrix of a free harmonic oscillator as a two-mode squeezed state, characterized by a squeezing parameter and squeezing angle. While the squeezing par…
Open quantum systems and Schwinger-Keldysh holograms
Chandan Jana, R. Loganayagam, Mukund Rangamani
We initiate the study of open quantum field theories using holographic methods. Specifically, we consider a quantum field theory (the system) coupled to a holographic field theory…
Renormalisation in Open Quantum Field theory II: Yukawa theory and PV reduction
Avinash, Chandan Jana, Arnab Rudra
We compute Passarino-Veltman (PV) reduction for tensor loop integrals, that appear in open field theories. We apply these results to open-Yukawa theory and compute the self-energy…
Nonlinear Langevin dynamics via holography
Bidisha Chakrabarty, Joydeep Chakravarty, Soumyadeep Chaudhuri +3
In this work, we consider non-linear corrections to the Langevin effective theory of a heavy quark moving through a strongly coupled CFT plasma. In AdS/CFT, this system can be iden…
Renormalization in Open Quantum Field theory I: Scalar field theory
Avinash, Chandan Jana, R. Loganayagam +1
While the notion of open quantum systems is itself old, most of the existing studies deal with quantum mechanical systems rather than quantum field theories. After a brief review o…