Condensed Matter and Many-Body Physics (Theory)

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Uma Divakaran

Associate Professor

IIT Email

D03 GF · 1515

Joined: 2017

Research: Non-equilibrium dynamics; quantum phase transitions; quantum information

Kusum Dhochak

Assistant Professor

IIT Email

D03 GF · 1508

Joined: 2019

Research: Strongly correlated electron systems; quantum spin liquids; topological phases; disorder

Amit Kumar Pal

Associate Professor

IIT Website Email

D03 GF · 1503

Joined: 2019

Research: Quantum information; open quantum systems; many-body quantum metrology; non-hermitian topology

Ph.D. Students

MS by Research Students

Publications

2026

1. Bridging the daemonic gap en route to charge multi-mode batteries via a single auxiliary, Chandrima B. Pushpan and Amit Kumar Pal, Physical Review A (2026).
2. Scalable and deterministic Greenberger-Horne-Zeilinger state generation via graph states-assisted measurements, Harikrishnan K. J. and Amit Kumar Pal, Physical Review A (2026).
3. Simultaneous cooling of qubits via a quantum absorption refrigerator and beyond, J. G. Krishnan, Chandrima B. Pushpan, and Amit Kumar Pal, Physics Letters A (2026).
4. Block entanglement bounds distribution of regionally localized entanglement, J. G. Krishnan, A. Sen(De), and Amit Kumar Pal, Physics Letters A (2026).
5. Floquet thermalization by power-law induced permutation symmetry breaking, Manju C and Uma Divakaran, Physical Review E (2026).
6. Scaling of entanglement entropy and correlations in the variable-range extended Ising model, Harikrishnan K. J., D. Sadhukhan, and Amit Kumar Pal, Physical Review A (2026).
7. Developing a universal logical state-purification strategy, Chandrima B. Pushpan, T. K. Konar, A. Sen(De), and Amit Kumar Pal, Physical Review A (2026).

2025

1. Entanglement and fidelity across quantum phase transitions in locally perturbed topological codes with open boundaries, Harikrishnan K. J. and Amit Kumar Pal, Physical Review A (2025).
2. Logarithmic growth of peripheral entanglement concentrated via noisy measurements in a star network of spins, J. G. Krishnan, Harikrishnan K. J., and Amit Kumar Pal, Physics Letters A (2025).
3. Disordering a permutation symmetric system: Revivals, thermalization, and chaos, Manju C, Uma Divakaran, and Arul Lakshminarayan, Physical Review E (2025).
4. Chaos controlled and disorder driven phase transitions induced by breaking permutation symmetry, Manju C, Arul Lakshminarayan, and Uma Divakaran, Scientific Reports (2025).
5. Recovery of resources through sequential noisy measurements, Sudipta Mondal, Pritam Halder, Amit Kumar Pal, and Aditi Sen(De), Physical Review A (2025).

2024

1. Estimating correlations and entanglement in the two-dimensional Heisenberg model in the strong-rung-coupling limit, Chandrima B. Pushpan, Harikrishnan K. J., Prithvi Narayan P, and Amit Kumar Pal, Physical Review A (2024).
2. The promises and challenges of many-body quantum technologies: A focus on quantum engines, Victor Mukherjee and Uma Divakaran, Nature Communications (2024).
3. Quantum critical engine at finite temperatures, Revathy B. S, Victor Mukherjee, and Uma Divakaran, The European Physical Journal B (2024).
4. Improving performance of quantum heat engines using modified Otto cycle, Revathy B. S, Harsh Sharma, and Uma Divakaran, Journal of Physics A: Mathematical and Theoretical (2024).
5. Quantum state transfer on 2D lattices: A low-energy effective Hamiltonian approach, Chandrima B. Pushpan, Harikrishnan K. J., and Amit Kumar Pal, Physics Letters A (2024).

2023

1. Localizing genuine multiparty entanglement in noisy stabilizer states, Harikrishnan K. J. and Amit Kumar Pal, Physical Review A (2023).
2. Controlling gain with loss: Bounds of localizable entanglement in multi-qubit systems, J. G. Krishnan, Harikrishnan K. J., and Amit Kumar Pal, Physical Review A (2023).
3. Designing refrigerators in higher dimensions using quantum spin models, T. K. Konar, S. Ghosh, Amit Kumar Pal, and Aditi Sen(De), Physical Review A (2023).

2022

1. Relaxation times do not capture logical qubit dynamics, Amit Kumar Pal, P. Schindler, A. Erhard, Á. Rivas, M. A. Martin-Delgado, R. Blatt, T. Monz, and M. Müller, Quantum (2022).
2. Bath Engineering Enhanced Quantum Critical Engines, Revathy B. S, Victor Mukherjee, and Uma Divakaran, Entropy (2022).
3. Designing robust quantum refrigerators in disordered spin models, T. K. Konar, S. Ghosh, Amit Kumar Pal, and A. Sen(De), Physical Review A (2022).
4. Hierarchies of localizable entanglement due to spatial distribution of local noise, Ratul Banerjee, Amit Kumar Pal, and Aditi Sen(De), Physical Review Research (2022).
5. Distinguishing phases via non-Markovian dynamics of entanglement in topological quantum codes under parallel magnetic field, Harikrishnan K. J. and Amit Kumar Pal, Physical Review A (2022).
6. Exactly solvable one-dimensional quantum models with gamma matrices, Y. Chugh, Kusum Dhochak, Uma Divakaran, Prithvi Narayan P, and Amit Kumar Pal, Physical Review E (2022).
7. Circulating genuine multiparty entanglement in quantum network, P. Halder, R. Banerjee, S. Ghosh, Amit Kumar Pal, and Aditi Sen(De), Physical Review A (2022).

2021

1. Three qubits in less than three baths: Beyond two-body system-bath interactions in quantum refrigerators, A. Ghoshal, S. Das, Amit Kumar Pal, A. Sen(De), and U. Sen, Physical Review A (2021).
2. Many-body quantum thermal machines, Victor Mukherjee, Uma Divakaran, Journal of Physics: Condensed Matter (2021).

2020

1. Uniform decoherence effect on localizable entanglement in random multi-qubit pure states, R. Banerjee, Amit Kumar Pal, and Aditi Sen(De), Physical Review A (2020).
2. Scalable characterization of localizable entanglement in noisy topological quantum codes, D. Amaro, M. Muller, and Amit Kumar Pal, New Journal of Physics (2020).
3. Phases and quantum phase transitions in an anisotropic ferromagnetic Kitaev-Heisenberg-Γ magnet, A. Nanda, Kusum Dhochak, and S. Bhattacharjee, Physical Review B (2020).
4. Adiabatic dynamics of quasiperiodic transverse Ising model, Revathy B.S. and Uma Divakaran, Journal of Statistical Mechanics: Theory and Experiment (2020).
5. Universal finite-time thermodynamics of many-body quantum machines from Kibble-Zurek scaling, Revathy B. S., Victor Mukherjee, Uma Divakaran and Adolfo del Campo, Physical Review Research (Editors' Suggestion) (2020).

2018

1. Sudden quenches in a quasiperiodic Ising model, Uma Divakaran, Physical Review E (2018).