Publications

Selected publications in trustworthy AI, privacy-preserving machine learning, LLM alignment, differential privacy, causal learning, and applied machine learning. A complete and current list is available on Google Scholar.

  1. Adaptive Multi-Value Control in LLMs via Causal Activation Steering
    Payel Bhattacharjee, Ravi Tandon
    (Under review).

  2. Conformal Speculative Speculative Decoding
    Payel Bhattacharjee, Osvaldo Simeone, Ravi Tandon
    Accepted for presentation at the ASILOMAR 2026 Conference (full paper forthcoming)..

  3. MARS: Margin and Semantic-Aware Data Augmentation for Reward Modeling
    Payel Bhattacharjee, Osvaldo Simeone, Ravi Tandon
    (Under review).

  4. Learning to Diagnose Privately: DP-Powered LLMs for Radiology Report Classification
    Payel Bhattacharjee, Fengwei Tian, Geoffrey D. Rubin, Joseph Y. Lo, Nirav Merchant, Heidi Hanson, John Gounley, Ravi Tandon
    IEEE Access, 2026.

  5. STAMP: Selective Task-Aware Mechanism for Text Privacy
    Fengwei Tian, Payel Bhattacharjee, Heidi Hanson, Geoffrey D. Rubin, Joseph Y. Lo, Ravi Tandon
    Conference of the European Chapter of the Association for Computational Linguistics (EACL), 2026.

  6. Conformal Sparsification for Bandwidth-Efficient Edge-Cloud Speculative Decoding
    Payel Bhattacharjee*, Fengwei Tian*, Mingyue Zhong*, Guangyi Zhang, Osvaldo Simeone, Ravi Tandon
    NeurIPS 2025 Workshop on AI and ML for Next-Generation Wireless Communications and Networking (AI4NextG).

  7. PROPS: Progressively Private Self-alignment of Large Language Models
    N. Teku, F. Tian, P. Bhattacharjee, S. Chakraborty, A. Bedi, R. Tandon
    Transactions on Machine Learning Research (TMLR), 2025.

  8. A framework for multi-source privacy preserving epidemic analysis
    Z. Guan, Z. Zhao, F. Tian, D. Nguyen, P. Bhattacharjee, R. Tandon, B. A. Prakash, A. Vullikanti
    arXiv Preprint, 2025.

  9. CURATE: Scaling-up Differentially Private Causal Graph Discovery
    P. Bhattacharjee, R. Tandon
    Entropy, 26(11), 946, 2024.

  10. Adaptive Privacy for Differentially Private Causal Graph Discovery
    P. Bhattacharjee, R. Tandon
    IEEE International Workshop on Machine Learning for Signal Processing (MLSP), 2024.

  11. Numerical Modelling and Performance Evaluation of SnS Based Heterojunction Solar Cell with p+-SnS BSF Layer
    P. Bhattacharjee, R. Garain, A. Basak, U. Singh
    Optical and Quantum Electronics, 54, Article 867, 2022.

  12. Sleep and Sedentary Behavior Analysis from Physiological Signals using Machine Learning
    P. Bhattacharjee, S. P. Kar, N. K. Rout
    2020 2nd International Conference on Innovative Mechanisms for Industry Applications (ICIMIA), pp. 240–244, 2020.