Current Research Direction

I am working with Prof. Ravi Prakash Singh on the study of superconducting–ferromagnetic (SC–FM) heterostructures, with a focus on naturally occurring systems and their interfacial proximity effects. The project involves investigating the emergence of spin-triplet pairing correlations, as well as characterizing spin transport, spin diffusion, and supercurrent propagation across SC–FM interfaces through transport measurements. A key objective is to identify signatures of topological superconductivity in such hybrid structures. On the theoretical side, the work is guided by the framework of dirty superconductors, employing quasiclassical Green's function methods and the Usadel equations to model interfacial phenomena, complemented by first-principles-informed approaches to connect microscopic mechanisms with experimental observations.

On a more personal side, I am trying to learn about K-Theoretic Classification of Topological Phases of Matter, trying to well-define myself on the more mathematical aspects of Physics.

Research Topics

01

Topological Quantum Matter & Magnetism

I study topological phases in both electronic and magnetic systems. This includes Chern insulators, symmetry-protected topological phases, and topological magnons. A key focus is on Dirac nodal line (DNL) magnonic phases in layered honeycomb collinear antiferromagnets. I investigate how interlayer spin canting interactions break PT symmetry, induce topological phase transitions, and lead to observable thermal Hall responses.

More broadly I am interested in how crystal symmetries and magnetic order combine to produce non-trivial band topology in bosonic and fermionic systems alike.

Chern Insulators Topological Magnons Honeycomb Antiferromagnets Thermal Hall Effect Spin Canting PT Symmetry
02

Topological Superconductivity

I am fascinated by unconventional superconducting phases where topology protects gapless boundary modes. This includes Majorana zero modes (MZMs) in one-dimensional p-wave superconductors and their realization in proximity-coupled systems. I am interested in the robustness of Majorana modes to disorder, their non-Abelian braiding statistics, and their potential for topological quantum computation.

I also study topological phase transitions driven by the interplay of spin-orbit coupling, magnetism, and superconducting pairing in two-dimensional systems.

Majorana Zero Modes p-wave Superconductivity Topological Phase Transitions Spin-Orbit Coupling Non-Abelian Anyons
03

Hybrid Superconductor Heterostructures

Proximity effects at interfaces between superconductors and other quantum materials are a rich playground for emergent physics. I study how superconducting correlations are inherited at SC–semiconductor and SC–magnet interfaces, how Andreev reflection and Crossed Andreev reflection operate in these systems, and what transport signatures can identify topologically non-trivial phases.

I am particularly interested in flat-band systems, altermagnets, and van der Waals heterostructures where topology and correlations intersect in unusual ways.

Proximity Effect Andreev Reflection Van der Waals Systems Flat-Band Physics Altermagnets
04

Quantum Materials & Engineered Heterostructures

I am interested in engineered quantum materials where topology and correlations intersect, including flat-band systems, altermagnets, and van der Waals heterostructures. My goal is to connect theoretical models with experimentally realizable systems, making predictions that can guide materials synthesis and spectroscopic measurements.

Van der Waals Materials Flat Bands Altermagnets Moiré Systems
05

Computational & Data-Driven Physics

I use numerical techniques including exact diagonalization, MPS/DMRG, and Monte Carlo methods to study quantum systems. I am also interested in machine learning approaches — particularly for identifying quantum phases of matter and for analyzing experimental data from scattering and spectroscopy experiments.

At TCS Research I applied deep learning to acoustic sensing in industrial pipelines, resulting in a published IEEE paper.

Exact Diagonalization MPS/DMRG Monte Carlo Machine Learning Phase Classification

Methods & Tools

Topological Methods

  • Berry phase, curvature & connections
  • Chern numbers & winding invariants
  • Bulk–boundary correspondence
  • Topological band theory
  • Majorana modes & edge-state analysis

Many-Body & Field-Theoretic Techniques

  • Second quantization formalism
  • Path integral methods
  • Mean-field & Bogoliubov approximations
  • Diagrammatic perturbation theory
  • Renormalization group (RG) methods

Open Quantum Systems & Information

  • Density matrix formalism
  • Lindblad master equations
  • Quantum channels & CPTP maps
  • Entanglement entropy & spectra
  • Quantum trajectories & measurement theory

Computational & Numerical Methods

  • Exact diagonalization
  • MPS / DMRG techniques
  • Monte Carlo (MCMC)
  • Tight-binding & lattice modeling
  • Python (NumPy, SciPy, QuTiP, PythTB)

Experimental Interfaces

  • Andreev reflection spectroscopy
  • Scanning tunneling microscopy (STM/STS)
  • Quantum transport measurements
  • Superconductor–ferromagnet interfaces
  • Data interpretation & model validation

Publications

Peer-reviewed journal articles, conference proceedings, and preprints. Authored and co-authored work in condensed matter physics and quantum sensing.

2
Publications
2
Journals
1
Solo Authored
2026
Decoherence of chiral magnon edge modes in a topological bosonic Chern insulator
Samriddha Ganguly
Journal of Physics: Condensed Matter, 38, 075801 (2026)
DOI Focus Issue Condensed Matter Solo-Authored
This work studies the decoherence of chiral magnon edge modes in a topological bosonic Chern insulator. The paper appears in the Focus Issue on Topological Physics: From Fundamentals to Applications in the Journal of Physics: Condensed Matter. We analyze how the topologically protected edge modes lose quantum coherence due to environmental coupling, and characterize the timescales and mechanisms of decoherence relevant to quantum magnonic devices.
2025
A Data-Driven Approach to Leak Identification and Severity Analysis in Pipelines Using Acoustic Sensing and Deep Learning
Mayukh Biswas; Aditya Narayan; Debaudh Ghosh; Samriddha Ganguly; Raj Rakshit; Chirabrata Bhaumik
IEEE Sensors Letters, 10(1) (2025) · Publisher: IEEE
DOI IEEE Acoustic Sensing
We present a data-driven methodology for pipeline leak identification and severity analysis, combining acoustic sensing with deep learning models. The approach uses time-series acoustic data collected along industrial pipelines, processed through convolutional and recurrent neural network architectures for leak localization and severity classification. Validation on real-world pipeline data demonstrates high accuracy in both tasks. This work arose from the TCS Research and Innovation Fellowship at IIT Kharagpur Research Park.

Presentations & Posters

2025
Topological Dirac Nodal Line Magnonic Phases in Layered Honeycomb Antiferromagnets
Samriddha Ganguly
International Conference on Quantum Materials and Emerging Concepts (QMEC 2025) — Poster
2025
Topological Dirac Nodal Line Magnonic Phases with Interlayer Spin Canting
Samriddha Ganguly
12th National Conference on Recent Trends in Material Science and Technology, IIST Trivandrum — Poster