I am a postdoctoral researcher at the Ubiquitous Knowledge Processing (UKP) Lab, TU Darmstadt, joining in September 2026.

My doctoral research was on neural topic models and representation learning over document corpora. Since then I have worked on retrieval-augmented generation and on mechanistic interpretability for language models — circuit discovery through edge attribution and activation patching, and sparse autoencoders for model steering.

Most recently, in industry, I built an LLM pipeline that extracts compliance obligations from legislation: bare acts together with their densely cross-referencing rules and regulations. The hard part there was multi-document reasoning with provenance — following reference chains across documents and keeping every output traceable to its source under lawyer review. That question, how to make a model's reasoning something you can actually audit, is what carries over into my postdoctoral work.

I hold a Ph.D. in Computer Science from the School of Mathematical & Computational Sciences at IACS, Kolkata (2020–2025). I defended my thesis, Studies on Neural Topic Models for Document Corpora, on 15 January 2026, supervised by Dr. Debarshi Kumar Sanyal.

RAGAgentic AIMechanistic interpretabilityLLM safety & alignmentTopic modelingNLP

For more detail see my CV, or write to me.

News

  • Joining the UKP Lab at TU Darmstadt as a Postdoctoral Researcher.Upcoming
  • Concluded my tenure as a GenAI Engineer at Lexplosion Solutions.
  • Awarded the MSCA COFUND BIENVENUE+ Postdoctoral Fellowship (score 18.01/20).
  • Presented DTECT at AAAI 2026 in Singapore, 20–27 January.
  • Successfully defended my Ph.D. thesis on 15 January 2026.
  • Serving as an Area Chair for ACM IKDD CODS 2026.

Publications

2026

DTECT: Dynamic Topic Explorer & Context Tracker

Suman Adhya, Debarshi Kumar Sanyal

AAAI'26 Demonstration Track, AAAI Conference on Artificial Intelligence

2025

S2WTM: Spherical Sliced-Wasserstein Autoencoder for Topic Modeling

Suman Adhya, Debarshi Kumar Sanyal

ACL'25 Association for Computational Linguistics

2025

Evaluating Negative Sampling Approaches for Neural Topic Models

Suman Adhya, Avishek Lahiri, Debarshi Kumar Sanyal, Partha Pratim Das

IEEE-TAI IEEE Transactions on Artificial Intelligence, vol. 5, no. 11

2024

GINopic: Topic Modeling with Graph Isomorphism Network

Suman Adhya, Debarshi Kumar Sanyal

NAACL'24 North American Chapter of the Association for Computational Linguistics

2023

Do Neural Topic Models Really Need Dropout? Analysis of the Effect of Dropout in Topic Modeling

Suman Adhya, Avishek Lahiri, Debarshi Kumar Sanyal

EACL'23 European Chapter of the Association for Computational Linguistics

2023

Improving Neural Topic Models with Wasserstein Knowledge Distillation

Suman Adhya, Debarshi Kumar Sanyal

ECIR'23 European Conference on Information Retrieval

2022

Improving Contextualized Topic Models with Negative Sampling

Suman Adhya, Avishek Lahiri, Debarshi Kumar Sanyal, Partha Pratim Das

ICON'22 International Conference on Natural Language Processing

Talks & meetings

Awards & grants

Academic service

  • Area chair
  • Rolling review
    ACL Rolling Review, 2023–present
  • Demonstrations
    EACL 2025 · IJCNLP–AACL 2025 · EMNLP 2025
  • Industry track
    EMNLP 2024, 2025 · NAACL 2025
  • Main conference
    ACL 2023 · EMNLP 2022
  • Workshops
    Web4Good @ WWW 2026 · PoliticalNLP @ LREC 2022, 2024, 2026
  • Volunteering
    Student volunteer and volunteer coordinator at EACL 2023

Teaching & mentoring

  • Jan–Jun 2024
    Teaching assistant, Introduction to Machine Learning
  • Jan–Jun 2021
    Teaching assistant, Numerical Methods laboratory
  • 2023–2024
    Master's thesis mentor — Gyana Ranjan Nayak
  • 2021–2022
    Master's thesis mentor — Avishek Lahiri
  • 2020–2021
    Master's thesis mentor — Kaustav Mallick

Education

  • 2020–2025
    Ph.D., Computer ScienceIACS, Kolkata Thesis: Studies on Neural Topic Models for Document Corpora, defended 15 January 2026. Advisor: Dr. Debarshi Kumar Sanyal
  • 2018–2020
    M.Sc., Mathematics & Computing — IACS, Kolkata
  • 2015–2018
    B.Sc. (Hons.), Mathematics — Serampore College, University of Calcutta

Appointments

  • From Sep 2026
    Postdoctoral ResearcherUKP Lab, TU Darmstadt, Germany
  • Apr–Jul 2026
    Senior Associate – IT (GenAI Engineer)Lexplosion Solutions, Kolkata Built an LLM pipeline extracting compliance obligations from bare acts and their subordinate rules, producing structured compliance inventories for corporate clients under lawyer review.
  • Jan–Apr 2026
    Postdoctoral Research Associate — IACS, Kolkata RAG pipelines for document-grounded question answering with LangChain, LangGraph and DeepEval; mechanistic interpretability — edge attribution patching (EAP/EAP-IG), activation patching for circuit discovery, and sparse autoencoders for model steering.

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