49 citations · 240 across the 12 of their papers we have counts for
13 papers
Exact formula for geometric quantum complexity of cosmological perturbations
Satyaki Chowdhury, Jakub Mielczarek
Nielsen's geometric approach offers a powerful framework for quantifying the complexity of unitary transformations. In this formulation, complexity is defined as the length of the…
Spread and circuit complexity as a measure of particle content and phase space fluctuations
Satyaki Chowdhury
In this work, we investigate the relation between different notions of quantum complexity, namely, circuit and spread complexity and physically meaningful quantities such as the pa…
Benchmarking quantum chaos from geometric complexity
Arpan Bhattacharyya, Suddhasattwa Brahma, Satyaki Chowdhury +1
Recent studies have shown that there is a strong interplay between quantum complexity and quantum chaos. In this work, we consider a new method to study geometric complexity for in…
Geometric measure of quantum complexity in cosmological systems
Satyaki Chowdhury, Martin Bojowald, Jakub Mielczarek
In Nielsen's geometric approach to quantum complexity, the introduction of a suitable geometrical space, based on the Lie group formed by fundamental operators, facilitates the ide…
Geometric quantum complexity of bosonic oscillator systems
Satyaki Chowdhury, Martin Bojowald, Jakub Mielczarek
According to the pioneering work of Nielsen and collaborators, the length of the minimal geodesic in a geometric realization of a suitable operator space provides a measure of the…
Circuit Complexity as a novel probe of Quantum Entanglement: A study with Black Hole Gas in arbitrary dimensions
Kiran Adhikari, Sayantan Choudhury, Satyaki Chowdhury +2
In this article, we investigate the quantum circuit complexity and entanglement entropy in the recently studied black hole gas framework using the two-mode squeezed states formalis…
Thermalization in Quenched Open Quantum Cosmology
Subhashish Banerjee, Sayantan Choudhury, Satyaki Chowdhury +3
In this article, we study the quantum field theoretic generalization of the Caldeira-Leggett model in general curved space-time considering interactions between two scalar fields i…
Circuit Complexity From Cosmological Islands
Sayantan Choudhury, Satyaki Chowdhury, Nitin Gupta +6
Recently in various theoretical works, path-breaking progress has been made in recovering the well-known Page Curve of an evaporating black hole with Quantum Extremal Islands, prop…
Quantum aspects of chaos and complexity from bouncing cosmology: A study with two-mode single field squeezed state formalism
Parth Bhargava, Sayantan Choudhury, Satyaki Chowdhury +4
, a well known computational technique has recently become the backbone of the physics community to probe the chaotic behaviour and random quantum fluctuations…
The Generalized OTOC from Supersymmetric Quantum Mechanics: Study of Random Fluctuations from Eigenstate Representation of Correlation Functions
Kaushik Y. Bhagat, Baibhab Bose, Sayantan Choudhury +7
The concept of out-of-time-ordered correlation (OTOC) function is treated as a very strong theoretical probe of quantum randomness, using which one can study both chaotic and non-c…
QMetrology from QCosmology: Study with Entangled Two Qubit Open Quantum System in De Sitter Space
Sayantan Choudhury, Satyaki Chowdhury, Nitin Gupta +1
In this paper, our prime objective is to apply the techniques of parameter estimation theory and the concept of Quantum Metrology in the form of Fisher Information to investigate t…
Indirect detection of Cosmological Constant from interacting open quantum system
Subhashish Banerjee, Sayantan Choudhury, Satyaki Chowdhury +4
We study the indirect detection of Cosmological Constant from an open quantum system of interacting spins, weakly interacting with a thermal bath, a massless scalar field minimally…
Open Quantum Entanglement: A study of two atomic system in static patch of de Sitter space
Samim Akhtar, Sayantan Choudhury, Satyaki Chowdhury +3
In this work, our prime objective is to study non-locality and long-range effects of two-body correlation using quantum entanglement from the various information-theoretic measures…