Ritabrata Sengupta

About

My research areas are functional analysis and quantum information theory. I am at the present working on Gaussian states/channels and their applications in Quantum Information theory.
For my PhD, I have worked on the structure theorem of positive maps between quantum systems and discovered new examples of positive maps which are not CP and in-decomposable. At the present, I am working on quantum information by using Gaussian states.
In future, I am planning to work on the CP maps, $E_0$ semi-groups and apply them in practical problems of quantum information.

Employment

• Indian Institute of Science Education and Research Berhampur Associate Professor
  2024 - Present
• Indian Institute of Science Education & Research Berhampur Assistant Professor
  2016 - 2024
• Indian Statistical Institute Delhi Centre Visiting Postdoctoral Research Scholar
  2014 - 2016

Education

• Indian Institute of Science Education and Research Mohali Ph. D.
  2009 - 2014

Projects & Funding

Projects & funding information is unavailable.

Publications (29)

• Logarithmic derivative operators, Cramér–Rao bounds, and Fisher information in quantum information theory
  Reviews in Mathematical Physics 2026 DOI: 10.1142/S0129055X25500229
  +Save
• Classifying locally distinguishable sets: No activation across bipartitions
  Physical Review A 2026 DOI: 10.1103/fqpj-614j
  +Save
• Divisibility of infinite dimensional dynamical maps
  Linear Algebra and its Applications 2026 DOI: 10.1016/j.laa.2026.01.020
  +Save
• Useful variants and perturbations of completely entangled subspaces and spans of unextendible product bases
  Infinite Dimensional Analysis, Quantum Probability and Related Topics 2024 DOI: 10.1142/S0219025724400113
  +Save
• Generating random Gaussian states
  Journal of Mathematical Physics 2024 DOI: 10.1063/5.0202147
  +Save
• Optimal teleportation fidelity and its deviation in noisy scenarios
  Modern Physics Letters A 2023 DOI: 10.1142/S0217732323501699
  +Save
• Entanglement monogamy in indistinguishable particle systems
  Scientific Reports 2023 DOI: 10.1038/s41598-023-46515-z
  +Save
• Conditions for local transformations between sets of quantum states
  Physical Review A 2022 DOI: 10.48550/ARXIV.2204.08821
  +Save
• A Szegő type theorem and distribution of symplectic eigenvalues
  Journal of Spectral Theory 2021 DOI: 10.4171/JST/377
  +Save
• Detecting entanglement in arbitrary two-mode Gaussian state: a Stokes-like operator based approach
  2021
  +Save