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Vishwa Vigyan Labs
Independent and collaborative research groups working across foundational theory, computation, quantum devices and scientific instrumentation.
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Vishwa Vigyan Labs hosts small, question-led groups and projects. Every public item is labeled by status, linked to its source record where possible, and presented without implying endorsement by a collaborator's university or employer.
Mesoscopic transport, local quantum quantities, time, measurement, topology, non-Hermitian systems and quantum thermodynamics.
Superconducting quantum devices, cryogenic microwave measurement, scientific instrumentation, materials and device characterization.
Lead: Prof. P. Singha Deo — S. N. Bose National Centre for Basic Sciences, India
The first theory group studies local and partial density-of-states quantities, scattering phases, Fano resonances, Landauer transport, Larmor/traversal time and the authors' proposed connections to quantum measurement.
Projects led or co-led by Souvik investigate SSH/AAH chains, nonreciprocal hopping, skin effects, quasiperiodic localization, spectral topology, Floquet driving and entanglement diagnostics.
Working manuscript: Non-Hermitian Skin Effect as a Quantum Battery Resource: Passive Ergotropy and Protocol-Dependent Charging in the SSH Chain — Souvik Ghosh, Sayak Roy, Saurabh Mishra and Nituparna Das.
The current draft studies how charger geometry interacts with skin-localized states and examines passive ergotropy, charging protocols, topology and disorder robustness. It is listed as a working manuscript, not as a verified publication.
Souvik's PhD research involves graphene/hBN hybrid Josephson devices, a gate- and flux-tunable graphene gatemon in a 3D microwave cavity, dilution-refrigerator preparation, microwave spectroscopy and time-domain characterization.