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An Autonomous Institution, Under the Ministry of Education, Government of India

Siddhartha Lal

Associate Professor
Dept: Physical Sciences (DPS)
E-mail: slal [at]
Personal homepage: Click Here

Research Interest:

I am a condensed-matter theorist interested in exploring how low-dimensionality, strong correlations and quantum fluctuations give rise to novel emergent states of matter in quantum condensed matter systems. Some recent examples include1. understanding the nature of edge state transport in an inhomogeneous quantum Hall state2. how competing charge-density wave (CDW) and superconducting orders can coexist in a stripe-based picture of a high-TC superconductor 3. the way in which frustrated interactions and critical quantum fluctuations push the dimensional crossover and insulator-to-metal transitions in organic charge-transfer systems 4. orbital-mediated frustration of spin order in orbitally active systems and the search for a quantum orbital-spin liquid 5. studying transport through Andreev bound states in graphene contacted with superconducting leads 6. simulating multichannel Kondo physics in ultra-cold bosonic systems 7. understanding the consequences of charge fractionalisation in a 1D strongly correlated electronic system.

Academic Background:

  1. Ph.D (Physics), Indian Institute of Science, Bangalore, 2003
  2. M.S. (Physics), Indian Institute of Science, Bangalore, 1998
  3. B.Sc. (Hons.) (Physics), Asutosh College (University of Calcutta), 1995


  1. Associate Professor, IISER Kolkata (current)
  2. Assistant Professor, IISER Kolkata (2010 - 2019)
  3. Postdoctoral Fellow, Department of Physics and Inst. for Cond. Matt. Theory, Univ. of Illinois at Urbana-Champaign (2008 - 2010)
  4. Postdoctoral Fellow, Abdus Salam International Centre for Theoretical Physics, Trieste (2006 - 2008)
  5. Postdoctoral Fellow, Institute for Theoretical Physics, University of Cologne (2002 - 2006)

Awards and Honors:

  1. Ramanujan Fellowship from Department of Science and Technology, Govt. of India (2010)

Selected Publications:

  1. Mukherjee, Anirban and Lal, Siddhartha. 2022."Superconductivity from repulsion in the doped 2D electronic Hubbard model: an entanglement perspective." J. Phys.: Condens. Matter, 34, 275601
  2. Mukherjee, Anirban; Mukherjee, Abhirup; Vidhyadhiraja, N. S.; Taraphder, A. and Lal, Siddhartha. 2022."Unveiling the Kondo cloud: Unitary renormalization-group study of the Kondo model." Physical Review B, 105, 085119
  3. Patra, Siddhartha and Lal, Siddhartha. 2021."Origin of topological order in a Cooper-pair insulator." Physical Review B, 104, 144514
  4. Mukherjee, Anirban; Patra, Siddhartha and Lal, Siddhartha. 2021."Fermionic criticality is shaped by Fermi surface topology: a case study of the Tomonaga-Luttinger liquid." Journal of High Energy Physics, 2021, 148
  5. Mukherjee, Anirban and Lal, Siddhartha. 2020."Holographic unitary renormalization group for correlated electrons - I: A tensor network approach." Nuclear Physics B, 960, 115170

All Publications: Click Here