PEOPLE Faculty
Sthitadhi Roy
ICTS-TIFR, Bengaluru
Area of Research:  Condensed Matter Physics and Statistical Mechanics
  +91 80 4653 6120    
H-202
  sthitadhiroy  ictsresin
  Personal Webpage

Academic Profile

Research Interests

My research interests broadly revolve around the out-of-equilibrium dynamics of interacting quantum many body systems in the presence and absence of disorder. Some of the specific directions I am working on currently are
  • Many-body localisation
  • Dynamics of quantum information in quantum many-body systems
  • Quantum measurements and open quantum systems

Prospective project/summer students: Please apply via the ICTS-S. N. Bhatt Memorial Excellence Fellowship Program/Long Term Visiting Students Program

Group:

Current Members:

  • PhD students
    • Bikram Pain 
    • Alan Sherry (co-supervised with Abhishek Dhar)
  • Postdocs
    • Indrajit Sau 
    • Sibaram Ruidas (working together with Subhro Bhattacharjee)
  • Project students
    • ​Shraddhanjali Chowdhury (LTVSP student, 2024-25)

​Former Members:

  • Soumi Ghosh (Postdoc, 2022-24, now Postdoc at KTH Stockholm)
  • ​Subhadip Chakraborty (LTVSP student, 2023-24, now PhD student at University of Regensburg with Prof F Evers)
  • Kritika Khanwal (LTVSP student,  2022-23)
  • Arpan Das (S.N. Bhatt summer student, 2023, now PhD student at IIT Kanpur)
  • Ratul Thakur (S.N. Bhatt summer student, 2022, now PhD student at ICTS-TIFR)
Publications/Preprints
 

  1. Alan Sherry and Sthitadhi Roy, "Measurement-invisible quantum correlations in scrambling dynamics", [arXiv:2410.24212]

  2. Sthitadhi Roy and D. E. Logan, "The Fock-space landscape of many-body localisation", [arXiv:2407.12685]

  3. Bikram Pain and Sthitadhi Roy, "Entanglement dynamics and eigenstate correlations in strongly disordered quantum many-body systems", [arXiv:2406.09392]

  4. Sthitadhi Roy, "Spectral Multifractality and Emergent Energyscales Across the Many-Body Localisation Transition", [arXiv:2404.07975]

  5. Bikram Pain, Kritika Khanwal, and Sthitadhi Roy, "Connection between Hilbert-space return probability and real-space autocorrelations in quantum spin chains" [Phys. Rev. B 108, L140201 (2023) (Letter)] [arXiv:2305:06374]

  6. Soumi Ghosh, Manas Kulkarni, and Sthitadhi Roy, "Eigenvector Correlations Across the Localisation Transition in non-Hermitian Power-Law Banded Random Matrices"[Phys. Rev. B 108, L060201 (2023) (Letter)] [arXiv:2304.09892]

  7. Sthitadhi Roy, "Anatomy of localisation protected quantum order on Hilbert space", (Invited article for J. Phys.: Condens. Matter special issue -- Emerging Leaders 2023)[J. Phys.: Condens. Matter 35, 415601 (2023)][arXiv:2307.06702]

  8. Isabel Creed, David E. Logan, and Sthitadhi Roy, "Probability transport on the Fock space of a disordered quantum spin chain", [Phys.Rev. B 107, 094206 (2023)][arXiv:2212.14333]

  9. Adam Nahum, Sthitadhi Roy, Sagar Vijay, and Tianci Zhou, "Real-time correlators in chaotic quantum many-body systems", [Phys. Rev. B 106, 224310 (2022)][arXiv:2205.11544]

  10. Sthitadhi Roy, "Hilbert-space correlations beyond multifractality and bipartite entanglement in many-body localised systems", [Phys. Rev. B 106, L140204 (2022) (Letter)][arXiv:2208.08468]

  11. Aydin Deger, Achilleas Lazarides, and Sthitadhi Roy, "Constrained Dynamics and Directed Percolation", [Phys. Rev. Lett. 129, 190601 (2022) (Editors' Suggestion)] [arXiv:2206.07724]

  12. Aydin Deger, Sthitadhi Roy, Achilleas Lazarides, "Arresting classical many-body chaos by kinetic constraints", [Phys. Rev. Lett. 129, 160601 (2022)][arXiv:2202.11726]

  13. Max McGinley, Sthitadhi Roy, and S. A. Parameswaran, "Absolutely Stable Spatiotemporal Order in Noisy Quantum Systems", [Phys. Rev. Lett. 129, 090404 (2022) (Editors' Suggestion)] [arXiv:2111.02499]

  14. Samuel J. Garratt and  Sthitadhi Roy, "Resonant energy scales and local observables in the many-body localised phase", [Phys. Rev. B 106, 054309 (2022)][arXiv:2202.10482]

  15. Jagannath Sutradhar, Soumi Ghosh, Sthitadhi Roy, David E. Logan, Subroto Mukerjee, Sumilan Banerjee, "Scaling of Fock-space propagator and multifractality across the many-body localization transition", [Phys. Rev. B 106, 054203 (2022)][arXiv:2203.07415]

  16. Alexander Duthie, Sthitadhi Roy, and David E. Logan, "Anomalous multifractality in quantum chains with strongly correlated disorder", [Phys. Rev. B 106, L020201 (2022) (Letter)][arXiv:2112.09856]

  17. S. J. Garratt, Sthitadhi Roy, and J. T. Chalker, "Local resonances and parametric level dynamics in the many-body localised phase", [Phys. Rev. B 104, 184203 (2021)][arXiv:2107.12387]

  18. Sthitadhi Roy and David E. Logan, "Fock-space anatomy of eigenstates across the many-body localisation transition", [Phys. Rev. B 104, 174201 (2021)][arXiv:2106.09036]

  19. Alexander Duthie, Sthitadhi Roy, and David E. Logan, "Localisation in quasiperiodic chains: a theory based on convergence of local propagators", [Phys. Rev. B 104, 064201 (2021)] [arXiv:2102.09454]

  20. Sthitadhi Roy, Roderich Moessner, and Achilleas Lazarides, "How periodic driving stabilises and destabilises Anderson localisation on random trees", [Phys. Rev. B 103, L100204 (2021) (Letter)] [arXiv:2101.00018]

  21. Adam Nahum, Sthitadhi Roy, Brian Skinner, and Jonathan Ruhman, "Measurement and entanglement phase transitions in all-to-all quantum circuits, on quantum trees, and in Landau-Ginsburg theory", [PRX Quantum 2, 010352 (2021) (Editors' Suggestion)][arXiv:2009.11311]

  22. Alexander Duthie, Sthitadhi Roy, and David E. Logan, "Self-consistent theory of mobility edges in quasiperiodic chains", [Phys. Rev. B 103, L060201 (2021) (Letter)][arXiv:2012:01450]

  23. Sthitadhi Roy and D. E. Logan, "Localisation on certain graphs with strongly correlated disorder", [Phys. Rev. Lett., 125, 250402 (2020)] [arXiv:2007.10357]

  24. Sthitadhi Roy, J. T. Chalker, I. V. Gornyi, Yuval Gefen, "Measurement-induced steering of quantum systems", [Phys. Rev. Research 2, 033347 (2020)] [arXiv:1912.04292]

  25. Sthitadhi Roy and Achilleas Lazarides, "Strong ergodicity breaking due to local constraints in a quantum system", [Phys. Rev. Research 2, 023159 (2020)] [arXiv:1912.06660]

  26. Sthitadhi Roy and David E. Logan, "Fock-space correlations and the origins of many-body localisation" [Phys. Rev. B 101, 134202 (2020) (Editors' Suggestion)], [arXiv:1911.12370]

  27. Achilleas Lazarides, Sthitadhi Roy, Francesco Piazza, Roderich Moessner, "Time crystallinity in dissipative Floquet systems" [Phys. Rev. Research 2, 022002(R) (2020)][arXiv:1904.04820]

  28. Sthitadhi Roy and David E. Logan, "Self-consistent theory of many-body localisation in a quantum spin chain with long-range interactions"[SciPost Phys. 7, 042 (2019)] [arXiv:1903.04851]

  29. Sthitadhi Roy, David E. Logan, J. T. Chalker, "Exact solution of a percolation analogue for the many-body localisation transition" [Phys. Rev. B 99, 220201(R) (2019)] [arXiv:1812.05115]

  30. Sthitadhi Roy, J. T. Chalker, David E. Logan, "Percolation in Fock space as a proxy for many-body localisation" [Phys. Rev. B 99, 104206 (2019) (Editors' Suggestion)] [arXiv:1812.06101]

  31. Jan Behrends, Sthitadhi Roy, Michael H. Kolodrubetz, Jens H. Bardarson, Adolfo G. Grushin, "Landau levels, Bardeen polynomials and Fermi arcs in Weyl semimetals: the who's who of the chiral anomaly" [Phys. Rev. B 99, 140201(R) (2019)][arXiv:1807.06615]

  32. Sthitadhi Roy and Achilleas Lazarides, "Nonequilibrium quantum order at infinite temperature: spatiotemporal correlations and their generating functions" [Phys. Rev. B 98, 064208 (2018)][arXiv:1804.08638]

  33. Sthitadhi Roy, Yevgeny Bar Lev, David J. Luitz, "Anomalous thermalization and transport in disordered interacting Floquet systems" [Phys. Rev. B 98, 060201(R) (2018)] [arXiv:1802.03401]

  34. Sthitadhi Roy, Achilleas Lazarides, Markus Heyl, Roderich Moessner, "Dynamical potentials for non-equilibrium quantum many-body phases" [Phys. Rev. B 97, 205143 (2018)][arXiv:1710.09388]

  35. Sthitadhi Roy, Michael Kolodrubetz, Nathan Goldman, Adolfo G. Grushin, "Tunable axial gauge fields in engineered Weyl semimetals: Semiclassical analysis and optical lattice implementations" [2D Materials, 5, 024001 (2018)][arXiv:1708.08469]

  36. Sthitadhi Roy, Ivan M. Khaymovich, Arnab Das, Roderich Moessner, "Multifractality without fine-tuning in a Floquet quasiperiodic chain" [SciPost Phys. 4, 025 (2018)][arXiv:1706.05012]

  37. Leda Bucciantini, Sthitadhi Roy, Sota Kitamura, Takashi Oka, "Emergent Weyl nodes and Fermi arcs in a Floquet Weyl semimetal" [Phys. Rev. B 96, 041126(R) (2017)] [arXiv:1612.01541]

  38. Sthitadhi Roy, Roderich Moessner, Arnab Das, "Locating topological phase transitions using non-equilibrium signatures in local bulk observables" [Phys. Rev. B 95, 041105(R) (2017)] [arXiv:1606.06673]

  39. Sthitadhi Roy, G. J. Sreejith, "Disordered Chern insulator with a two-step Floquet drive" [Phys. Rev. B 94, 214203 (2016) ][arXiv:1608.06302]

  40. Sthitadhi Roy, Michael Kolodrubetz, Joel E. Moore, Adolfo G. Grushin, "Chern numbers and chiral anomalies in Weyl butterflies" [Phys. Rev. B 94, 161107(R) (2016)] [arXiv: 1605.08445]

  41. Giuseppe De Tomasi, Sthitadhi Roy, Soumya Bera, "Generalized Dyson model: nature of zero mode and its implication in dynamics", [Phys. Rev. B 94, 144202 (2016)] [arXiv: 1605:07641]

  42. Sthitadhi Roy and Sourin Das, "Transport signatures of surface potentials on three-dimensional topological insulators" [Phys. Rev. B 93, 085422 (2016)] [arXiv: 1509.05432]

  43. Sthitadhi Roy, Adolfo G. Grushin, Roderich Moessner, Masudul Haque, "Wavepacket dynamics on Chern band lattices in a trap" [Phys. Rev. A 92, 063626 (2015)] [arXiv: 1509.03638]

  44. Adolfo G. Grushin, Sthitadhi Roy, Masudul Haque, "Response of fermions in Chern bands to spatially local quenches" [J. Stat. Mech. (2016) 083103] [arXiv: 1508.04778]

  45. Sthitadhi Roy, Krishanu Roychowdhury, Sourin Das, "Pseudo-spin half metals on the surface of 3-D topological insulators", [New J. Phys. 18, 073038 (2016)] [arXiv: 1502.07871

  46. Sthitadhi Roy, Kush Saha, Sourin Das, "Probing surface states exposed by crystal terminations at arbitrary orientations of three-dimensional topological insulators", [Phys. Rev. B 91, 195415 (2015)] [arXiv: 1411:1256]

  47. Sthitadhi Roy, Abhiram Soori, Sourin Das, "Tunnel Magnetoresistance scan of a pristine 3D topological insulator", [Phys. Rev. B 91, 041109(R), (2015)] [arXiv: 1407:4407]

  48. Tanay Nag, Sthitadhi Roy, Amit Dutta, Diptiman Sen, "Dynamical localization in a chain of hard core bosons under a periodic driving" [Phys. Rev. B, 89, 165425 (2014)] [arXiv: 1312:6467]

  49. Sthitadhi Roy, Tanay Nag, Amit Dutta, "Fidelity, Rosen-Zener dynamics, entropy and decoherence in one dimensional hard-core bosonic systems" [Eur. Phys. J. B 86, 204 (2013)] [arxiv: 1212.4655]

  50. Sthitadhi Roy and Arkady Pikovsky, "Spreading of energy in the Ding-Dong model" [Chaos 22, 026118 (2012)] [arXiv:1111.7128]