Himadri Shekhar Dhar
Assistant Professor
Photograph: 
Phone: 
+91 22 2576 7570
Email: 
himadri.dhar@iitb.ac.in
Office: 

- 223

Research Interests: 
  • Quantum information, entanglement and resource theories: Entanglement and quantum correlations in quantum optics and many-body systems. Mathematical perspective of entanglement and other resource theories. 
  • Light-matter interaction, cavity QED and hybrid quantum systems: Theoretical and numerical study of the interaction of light with spins or emitters and hybrid quantum systems for application in quantum technology.
  • Quantum optics: Theoretical models to study photon condensation and nonequilibrium phenomena in micro-cavities. Generation of single photon sources and nonclassical light.
  • Complex dynamics and tensor network methods: Study the dynamics of open systems using tensor networks and renormalization group formalism to design quantum protocols and hybrid quantum devices in cavity and circuit QED.
  • Optimal control theory, state engineering, machine learning: Developing optimal control models to design quantum storage/memory and use of machine learning algorithms to engineer these quantum systems.
  • Quantum resources in biological systems: The role of quantum correlations and dissipation in understanding transfer of excitations in photosynthetic complexes.
Selected Publications: 
  1. Benjamin T. Walker, Joao D. Rodrigues, Himadri S. Dhar, Rupert F. Oulton, Florian Mintert and Robert A. Nyman, Nonstationary correlation in formation jitter of photonic condensates, Nature Communications 11, 1390 (2020).
  2. Benjamin T. Walker, Henry J. Hesten, Himadri S. Dhar, Robert A. Nyman, and Florian Mintert, Noncritical slowing down of photonic condensation. Phys. Rev. Lett. 123, 203602 (2019)
  3. Himadri Shekhar Dhar, Matthias Zens, Dmitry O. Krimer, and Stefan Rotter, Variational Renormalization Group for Dissipative Spin-Cavity Systems: Periodic Pulses of Nonclassical Photons from Mesoscopic Spin Ensembles, Phys. Rev. Lett. 121, 133601 (2018).
  4. Sudipto Singha Roy, Himadri Shekhar Dhar, Debraj Rakshit, Aditi Sen(De) and Ujjwal Sen, Analytical recursive method to ascertain multisite entanglement in doped quantum  spin ladders, Phys. Rev. B 96, 075143 (2017).
  5. Alexander Streltsov, Uttam Singh, Himadri Shekhar Dhar, Manabendra Nath Bera, and Gerardo Adesso, Measuring Quantum Coherence with Entanglement, Phys. Rev. Lett. 115, 020403 (2015). Highlighted in Phys.org as “Physicists find quantum coherence and quantum entanglement are two sides of the same coin”, and Nature India titled “New research to aid quantum computing, teleportation”.
  6. Uttam Singh, Manabendra Nath Bera, Himadri Shekhar Dhar, and Arun Kumar Pati, Maximally coherent mixed states: Complementarity between maximal coherence and mixedness, Phys. Rev. A 91, 052115 (2015).
  7. Himadri Shekhar Dhar, Aditi Sen(De), and Ujjwal Sen, Characterizing genuine multisite entanglement in isotropic spin lattices, Phys. Rev. Lett. 111, 070501 (2013).
  8. Himadri Shekhar Dhar, Aditi Sen(De), and Ujjwal Sen, Density matrix recursion method: Genuine multisite entanglement distinguishes odd from even quantum Heisenberg ladders, New J. Phys. 15, 013043 (2013). Selected by the editors of New Journal of Physics in the exclusive ‘Highlights of 2013’ collection. Papers were chosen on the basis of referee endorsement, novelty, scientific impact and broadness.
  9. Himadri Shekhar Dhar, Rupamanjari Ghosh, Aditi Sen(De), and Ujjwal Sen, Quantum discord surge heralds entanglement revival in an infinite spin chain, EPL 98, 30013 (2012)
  10. Himadri Shekhar Dhar and Aditi Sen(De), Entanglement in resonating valence bond states: Ladder versus isotropic lattices, J. Phys. A: Math. Theor. 44, 465302 (2011). Published as a Featured article and Cover page of the Issue 46, Volume 44 of J. Phys. A

 

For the complete list of publications, see my Google Scholar profile or arXiv page.

Research Category: