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Mesoscopic Time Group

Group Lead: Prof. P. Singha Deo

Theoretical Research — Vishwa Vigyan Labs

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Research focus

The group investigates how local, measurable quantities in phase-coherent open systems can inform the physics of transport, scattering, measurement and time.

Core themes include:

• local and partial density of states, including negative LPDOS
• Fano resonances, scattering phases and coherent-current response
• Larmor clocks, traversal time and local-time descriptions
• Landauer-Büttiker conductance and mesoscopic measurement
• the quantum-classical boundary
• experimentally distinguishable consequences of the authors' framework

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Claim ladder: the existence and calculations of LPDOS belong to the published theoretical record; interpreting negative LPDOS as a negative-time signal is the authors' proposed physical interpretation; direct experimental validation of broader time-travel claims remains open.

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Published research and books

Negative Local Partial Density of States

Kanchan Meena, Souvik Ghosh and P. S. Deo — Journal of Condensed Matter 3(1), 16–21 (2025)

The paper studies LPDOS in mesoscopic systems with Fano resonances and reports that the quantity can become negative, with an associated enhancement of coherent currents.

Journal article · DOI: 10.61343/jcm.v3i01.113 · arXiv:2503.07031

Mesoscopic Route to Time Travel

Prosenjit Singha Deo — Springer, 2021

A monograph developing the group's mesoscopic framework around quantum transport, clocks, scattering phase, negative partial density of states and the physical meaning of time.