Subhayan Sahu portrait

Postdoctoral Research Fellow

Perimeter Institute for Theoretical Physics

Postdoctoral Researcher

Areas of research: Quantum Information Quantum Matter

https://subhayansahu.github.io/

Overview
I work at the intersection of quantum many-body physics and quantum information. My particular interest lies in the dynamics of quantum information in many-body systems, with a focus on understanding the informational "phases" of matter which can be generated in non-equilbrium settings. I also like working with tensor networks, as both a conceptual and numerical tool for studying quantum phenomena.
Research Interests
Quantum Information, Condensed Matter Physics, Statistical Mechanics
Recent Publications
  • Panahi, Y., Sahu, S., Manjunath, N., & Wang, C. (2026). Quantum criticality at strong randomness: a lesson from anomaly. https://arxiv.org/abs/2602.02648v1
  • Sahu, S., Li, Y., & Sala, P. (2026). Entanglement-cost hierarchies in quantum fragmented mixed states. Physical Review A, 113(2), 022406. doi:10.1103/wbzt-scvs
  • Negari, A. -R., Sahu, S., Behrends, J., Béri, B., & Hsieh, T. H. (2026). Critical non-equilibrium phases from noisy topological memories. doi:10.48550/arxiv.2601.10792
  • Sahu, S., & Vidal, G. (2025). Fractal decompositions and tensor network representations of Bethe wavefunctions. SciPost Physics Core, 8(4), 067. doi:10.21468/scipostphyscore.8.4.067
  • Negari, A. -R., Lessa, L. A., & Sahu, S. (2025). Symmetry enforces entanglement at high temperatures. doi:10.48550/arxiv.2508.20166
  • Sahu, S., & Vidal, G. (2025). Fractal decompositions and tensor network representations of Bethe wavefunctions. doi:10.21468/scipost.report.11620
  • Sahu, S., Li, Y., & Sala, P. (2025). Entanglement cost hierarchies in quantum fragmented mixed states. https://arxiv.org/abs/2506.04637v1
  • Moharramipour, A., Lessa, L. A., Wang, C., Hsieh, T. H., & Sahu, S. (2024). Symmetry-Enforced Entanglement in Maximally Mixed States. PRX Quantum, 5(4), 040336. doi:10.1103/prxquantum.5.040336
  • Sahu, S., & Jian, S. -K. (2024). Phase transitions in sampling and error correction in local Brownian circuits. Physical Review A, 109(4), 042414. doi:10.1103/physreva.109.042414
  • Negari, A. -R., Sahu, S., & Hsieh, T. H. (2024). Measurement-induced phase transitions in the toric code. Physical Review B, 109(12), 125148. doi:10.1103/physrevb.109.125148
  • Agarwal, L., Sahu, S., & Xu, S. (2023). Charge transport, information scrambling and quantum operator-coherence in a many-body system with U(1) symmetry. Journal of High Energy Physics, 2023(5), 37. doi:10.1007/jhep05(2023)037
Seminars
  • Symmetry enforced entanglement in maximally mixed states, Quantum Information, 2024/08/21, PIRSA:24080002
  • Bethe ansatz as an exact tree tensor network, 2024/03/07, PIRSA:https://meetings.aps.org/Meeting/MAR24/Session/W58.5
  • Measurement-induced phase transitions in the toric code, Google Quantum AI, USA, 2024/02/21
  • Measurement-induced phase transitions in the toric code, Tata Institute of Fundamental Research, Physics, Mumbai, India, 2024/01/29
  • Measurement-induced phase transitions in the toric code, Stability of Quantum Matter in and out of Equilibrium at Various Scales, International Center for Theoretical Sciences, Bengaluru, India, 2024/01/15
  • Phase transitions in sampling and error correction in local Brownian circuits, University of Nottingham, Physics, Nottingham, United Kingdom, 2023/11/01
  • Phase transitions in sampling and error correction in local Brownian circuits, Boulder School for Condensed Matter and Material Physics (https://boulderschool.yale.edu/2023/student-poster-sessions), University of Colorado Boulder, 2000 Colorado Ave, Boulder, CO, 80309, United States, 2023/07/14
  • Entanglement dynamics and measurement in Brownian quantum circuits, University of Toronto, Toronto, Canada, 2023/03/27