AhanaChakraborty

Assistant Professor of Physics

Ph.D., 2019 - Theoretical Physics, Tata Institute of Fundamental Research, Mumbai India

Louisiana State University
Department of Physics & Astronomy
210-C Nicholson Hall, Tower Dr.
Baton Rouge, LA 70803-4001
225-578-0578-Office
ahanachakraborty@lsu.edu
Personal Home Page

Research Interests

Condensed Matter Physics

My research group, "Quantum Dynamics and Information", works in the interdisciplinary fields in theoretical condensed matter physics and quantum information science. My research focuses on the non-equilibrium dynamics of quantum many-particle systems, especially in open quantum systems and disordered systems. 

An open quantum system represents a novel platform of many-body physics, allowing a quantum system to interact with an external observer or exchange energy and particles with its environment. Understanding the non-unitary dynamics of OQS is crucial for addressing fundamental questions in statistical physics, such as thermalization, the approach to non-thermal steady states, and the generation of quantum entanglement. My research group is actively interested in exploring the dynamics of different realisations of open quantum many-body systems, such as:

• Manipulation of quantum materials by light: An interesting realisation of open quantum systems is the ubiquitous interaction between quantum materials and external electromagnetic field. Light, either in the form of a classical laser field or quantum light in cavities, can be employed to manipulate the properties of a quantum material across a wide range of frequencies, leading to the emergence of novel phases that are inaccessible in closed systems. My research group is interested in understanding a wide range of light-induced phenomena ranging from light-induced structural phase transition to novel phenomena in photon-mediated superconductivity in quantum materials.
• Entanglement dynamics in quantum circuits: Open quantum systems offer promising applications in quantum information processing devices. My research group is broadly interested in understanding the entanglement dynamics  and the propagation of information in the non-unitary dynamics of quantum circuits which serve as the building blocks of recent quantum devices. By navigating the interplay between entangling unitary dynamics and disentangling measurements, one can induce novel entanglement phase transitions. My research interests in this field focus on both fundamental questions like (a) how does the presence of symmetry constraints in the circuit affect the critical properties of measurement-induced entanglement transitions (MIPT)? and also address issues with practical roadblocks to realise MIPT in experiments, such as (b) how robust are the transitions and the critical properties to the presence of weak dissipation/decoherence in the hybrid circuit? and (c) how can we overcome the post-selection problem, i.e. reproducing the exact same sequence of measurement outcomes to average observables in experiments? We are actively exploring the possibilities of observing the entanglement phase transition in new experimental platforms, such as bosonic quantum devices implemented in multimode circuit QED systems.

Select Publications

• "Tunable Spatiotemporal Orders in Driven Insulators"; Daniel Kaplan, Pavel A Volkov, Ahana Chakraborty, Zekun Zhuang, Premala Chandra; arXiv:2405.12214.

   

• "Light-Driven Transitions in Quantum Paraelectrics"; Zekun Zhuang, Ahana Chakraborty, Premala Chandra, Piers Coleman and Pavel A. Volkov; Physical Review B, 107, 224307 (2023)
  

   

• "Long-Range Photon Fluctuations Enhance Photon-Mediated Electron Pairing and Superconductivity"; Ahana Chakraborty, Francesco Piazza; Physical Review Letters 127, 177002 (2021) 
  

   

• "Charge and Entanglement Criticality in a U(1)-Symmetric Hybrid Circuit of Qubits"; Ahana Chakraborty, Kun Chen, Aidan Zabalo, Justin H. Wilson, J. H. Pixley; Physical Review B, 110, 045135 (2024)
  

   

• "Boundary transfer matrix spectrum of measurement-induced transitions"; Abhishek Kumar, Kemal Aziz, Ahana Chakraborty, Andreas W. W. Ludwig, Sarang Gopalakrishnan, J.H. Pixley, Romain Vasseur; Physical Review B, 109, 014303 (2024) 
  

   

• "Non-equilibrium Dynamics of Renyi Entropy for Bosonic Many-Particle Systems"; Ahana Chakraborty, Rajdeep Sensarma; Physical Review Letters 127, 200603 (2021)