Assistant Professor

Dr Ashmita Das

Department of Physics

Interests

  1. Semiclassical Gravity Theories
  2. Unruh- Fulling Effect and its Applications
  3. Relativistic Quantum Information & Quantum Gravity Phenomenology

Faculty Details

Education

2005

Vidyasagar College, University of Calcutta
India
BSc

2007

Sikkim Manipal Institute of Technology, Majitar, Sikkim
India
MSc

2015

Indian Association for the Cultivation of Science, Kolkata
India
PhD

Experience

  • 2022-2023, Postdoctoral Research Associate -III | S. N. Bose National Centre for Basic Sciences, Saltlake, Kolkata, West Bengal
  • 2019-2021, Postdoctoral Fellow | Indian Institute of Technology, Madras
  • 2016-2019, Postdoctoral Fellow | Indian Institute of Technology, Guwahati, Assam

Research Interest

  • Exploring the aspects of Semiclassical Gravity Theory in the context of the black hole and cosmological spacetime.
  • Studying the applications of the Unruh-Fulling effect, (which plays a crucial role in understanding the Quantum Field Theory in curved spacetime/semiclassical gravity theory) via the Unruh-deWitt detector method in flat/curved spacetime.
  • The relativistic Quantum information theory (RQI), where one studies quantum information theory in the background of flat/curved spacetime.
  • Studying the phenomena of quantum entanglement and its consequences, such as entanglement harvesting in flat and curved spacetime.
  • Exploring the phenomenological implications of the theories with minimal length scale such as the Generalised Uncertainty Principle (GUP), Relativistic version of GUP, etc.

Awards & Fellowships

  • 2022 – Postdoctoral Fellowship – Department of Science and Technology (DST), India
  • 2019 - Postdoctoral Fellowship – Ministry of Human Resource Development (MHRD), India
  • 2016 - Postdoctoral Fellowship – Ministry of Human Resource Development (MHRD), India
  • 2010 - Senior Research Fellowship – Department of Science and Technology (DST), India
  • 2008 - Junior Research Fellowship– Department of Science and Technology (DST), India

Publications

  • “Virtual transitions in an atom-mirror system in the presence of two scalar photons”, Ashmita Das, Soham Sen, Sunandan Gangopadhyay, arXiv:2208.12021 [quant-ph], Physical Review D, 107, 2, 025009, (2023).
  • “Unruh-Fulling effect in nonlocal field theory: The role of Unruh decomposition”, Ashmita Das, Bibhas R. Majhi, arXiv:2204.13513 [hep-th], Physical Review D, 106, 10, 105025, (2022).
  • “Non-minimally Coupled Vector Boson Dark Matter”, Basabendu Barman, Nicola ́s Bernal, Ashmita Das, Rishav Roshan, arXiv:2108.13447 [hep-ph], Journal of Cosmology Astroparticle Physics, 01, 01, 047, (2022).
  • “Bounds on Gup parameters from GW150914 and GW190521”, Ashmita Das, Saurya Das, Noor R Mansour , Elias C. Vagenas, arXiv:2101.03746 [gr-qc], Physics Letters B, 819, 136429, (2021).
  • “Discreteness of Space from GUP in Strong Gravitational Fields”, Ashmita Das, Saurya Das, Elias C. Vagenas, arXiv: 2006.05781 [gr-qc], Physics Letters B, 809, 135772, (2020).
  • “Conformal Vacuum and Fluctuation-Dissipation in de-Sitter Universe and Black Hole Spacetimes”, Ashmita Das, Surojit Dolui, Chandramouli Chowdhury and Bibhas R Majhi, Physical Review D, 100, 8, 085002, (2019).
  • “Unruh-DeWitt detector in presence of multiple scalar fields : A Toy Model”, Chandramouli Chowdhury, Ashmita Das, Bibhas Ranjan Majhi, arXiv:1711.0510 [hep-th], The European Physical Journal Plus, 134, 2, 65 (2019).
  • “Invisibility of antisymmetric tensor fields in the light of F(R) gravity”, Ashmita Das, Tanmoy Paul and Soumitra SenGupta, arXiv:1804.06602 [hep-th], Physical Review D, 98, 10, 104002 (2018).
  • “Noether and ADT conserved quantities in scalar-tensor theory of gravity both in Jordon and Einstein frames”, Krishnakanta Bhattacharya, Ashmita Das, Bibhas Ranjan Majhi, arXiv:1803.03771[gr-qc], Physical Review D, 97, 12, 124013 (2018).
  • “Bouncing cosmology from warped extra dimensional scenario”, Ashmita Das, Debaprasad Maity, Tanmoy Paul and Soumitra SenGupta, arXiv:1706.00950 [hep-th], The European Physical Journal C, 77, 12, 813, (2017).
  • “Radion stabilisation in higher curvature warped spacetime”, Ashmita Das, Hiya Mukherjee, Tanmoy Paul and Soumitra SenGupta, arXiv:1701.01571 [hep-th], The European Physical Journal C, 78, 2, 108, (2018).
  • “Higher rank antisymmetric tensor fields in Klebanov-Strassler geometry” Ashmita Das, Soumitra Sengupta, arXiv:1512.01381 [hep-th], Physical Review D, 93, 10, 105012, (2016).
  • “Lightest Kaluza-Klein graviton mode in a backreacted Randall-Sundrum scenario”, Ashmita Das, Soumitra Sengupta, arXiv:1506.05613 [hep-th], The European Physical Journal C, 76, 8, 423, (2016).
  • “Why has spacetime torsion such negligible effect on our universe?” Ashmita Das, Biswarup Mukhopadhyaya, Soumitra Sengupta, arXiv:1410.0814 [hep-th], Physical Review D, 90, 10, 107901, (2014).
  • “Graviton modes in multiply warped geometry model”, Mathew Thomas Arun, Debajyoti Choudhury, Ashmita Das, Soumitra Sengupta, arXiv:1410.5591 [hep-ph], Physics Letters B, 746, 266-275, (2015).
  • “Gauge and moduli hierarchy in a multiply warped braneworld scenario”, Ashmita Das, Soumitra Sengupta, arXiv:1204.1154 [hep-th], Physics Letters B, 718, 1566-1570, (2013).
  • “Bulk Higgs and gauge fields in a multiply warped brane world model”, Ashmita Das, R.S. Hundi, Soumitra Sengupta, arXiv:1105.1064 [hep-ph], Physical Review D, 83, 116003, (2011).
  • “Antisymmetric tensor fields in a generalized Randall-Sundrum scenario”, Ashmita Das, Soumitra Sengupta, arXiv:1010.2076 [hep-th], Physics Letters B, 698, 311-318, (2011)

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