About
I work at the interface of quantum field theory, gravitation, and quantum information.
My research explores how quantum effects manifest in curved spacetime and how they can be
probed using low-energy experimental platforms.
Research Interests
QFT in Curved Spacetime
Relativistic Quantum Information
Quantum Optics & Interferometry
Low-energy Quantum Gravity Experiments
Gravitational Wave Detection
Current Work
- Photon–graviton interaction and Raman-like mechanisms
- Novel gravitational wave detection proposals
- Quantum effects in non-inertial frames
- Gravity induced entanglement and decoherence
Publications
Full list available on
INSPIRE.
Preprints
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K. Hari and S. Shankaranarayanan, Gravitational wave detection via photon-graviton scattering and quantum interference (2026), arXiv:2601.20553[gr-qc].
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K. Hari, Subhajit Barman and Dawood Kothawala, Twin-paradox and Entanglement (2025), arXiv:2512.10908[gr-qc].
Published
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P. George Christopher, K. Hari and S. Shankaranarayanan, The gravitational spectral radio forest: a signature of primordial black holes, Int. J. Mod. Phys. D (2026), arXiv:2605.13042[gr-qc].
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Subhajit Barman and K. Hari, Radiative process of tripartite entangled probes in inertial motion, Phys. Rev. D 113, 045012 (2026), arXiv:2512.08578[gr-qc].
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Dawood Kothawala and K. Hari, Universal imprints of spacetime curvature in quantum entanglement and decoherence, J. Phys. Conf. Ser. 3017, 012008 (2026).
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Mayank, K. Hari, Subhajit Barman, and Dawood Kothawala, Entanglement between accelerated probes in a de Sitter spacetime, Phys. Rev. D 111, 105022 (2025), arXiv:2502.20874[gr-qc].
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K. Hari and Dawood Kothawala, Rotating detectors in dS and AdS spacetimes, Phys. Rev. D 109, 104073 (2024), arXiv:2307.16413[gr-qc].
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K. Hari, Subhajit Barman and Dawood Kothawala, “Universal role of curvature in vacuum entanglement, Phys. Rev. D 109, 065017 (2024), arXiv:2311.15019[gr-qc].
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K. Hari and Dawood Kothawala, Effect of tidal curvature on dynamics of accelerated probes”, Phys. Rev. D 104, 064032 (2021), arXiv:2106.14496[gr-qc].
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K. Hari and Dawood Kothawala, Normal coordinates based on curved tangent space”, Phys. Rev. D 101, 124066 (2020), arXiv:2003.10169[gr-qc].
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K. Hari, K. Manikandan and R. Sankaranarayanan, Dissipative optical solitons in asymmetric Rosen-Morse potential, Phys. Lett. A 384, 126104 (2020), arXiv:1911.05605[nlin.PS].
Contact
Email: hari.k@iitb.ac.in, harik@physics.iitm.ac.in, hariramu11@gmail.com