75 citations · 156 across the 7 of their papers we have counts for
7 papers
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…
A study of non-linear Langevin dynamics under non-Gaussian noise with quartic cumulant
Chandan Jana
We consider a non-linear Langevin equation in presence of non-Gaussian noise originating from non-linear bath. We claim, the parameters in the Langevin equation are not physical. T…
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…