Dr. Manabendra Nath Bera
Assistant Professor , Physical Sciences

Our research interests involve both theoretical understanding of fundamental physics from the point of view of quantum information theory and their possible applications in quantum technologies. These include exploring basic questions and their physically realizable applications, in particular, in thermodynamics and statistical mechanics, foundations of quantum mechanics, quantum optics and spin-systems, understanding quantum correlations between space-like separated systems and time-like separated events, quantum causality, information theory for indistinguishable particles and quantum field theories (QFT), and relativistic quantum information theory, e.g. black-hole information paradox.

Quantum information theory (QIT) is a relatively new field at the cross-over of two of the biggest scientific developments of the last century: quantum mechanics and information theory. The ideas of quantum information science hold great promise for a technological breakthrough in case a quantum computer is ever built, or reliable long-distance quantum communication is eventually achieved. But QIT represents much more than that, which in fact
is our main motivation for pursuing research in this area. It is clear that we are obliged to consider quantum mechanics if we want to understand the fundamental limits for computation and information transmission using microscopic systems, the essential ingredients of information technology. Quantum theory turns out to be an unavoidable part of computer science and information theory. Conversely, we are also compelled to take into consideration such computational and information-theoretical aspects of quantum mechanics if we want to understand why quantum world behaves the way it is, or how we can use it in order to make useful predictions about physical phenomena and technological advancements.

While much of the interest in this field is spurred by the possible use of quantum computers for code breaking using fast factoring algorithms, to the physicists interested in deeper issues, it presents an entirely new set of questions based on a radically different approach to understand the quantum world. This is exactly our goal - understanding physics as the flow of information by exploiting quantum information theory.

• Manabendra Nath Bera, Arnau Riera, Maciej Lewenstein, Zahra Baghali Khanian, Andreas Winter, Thermodynamics as a Consequence of Information Conservation, Quantum 3, 121 (2019).
• Manabendra Nath Bera, Arnau Riera, Maciej Lewenstein, Andreas Winter, Universal Laws of Thermodynamics, Nature Communications 8, 2180 (2017).
• Manabendra Nath Bera, Antonio Acín, Marek Kuś, Morgan Mitchell, Maciej Lewenstein , Randomness in Quantum Mechanics: Philosophy, Physics and Technology, Report on Progress in Physics 80, 124001 (2017).
• Alexander Streltsov, Swapan Rana, Manabendra Nath Bera, Maciej Lewenstein, Towards Resource Theory of Coherence in Distributed Scenarios, Phys. Rev. X 7, 011024 (2017).
• A. Streltsov, E. Chitambar, S. Rana, M. N. Bera, A. Winter, M. Lewenstein, Entanglement and coherence in quantum state merging, Phys. Rev. Lett. 116, 240405 (2016).
• E. Chitambar, A. Streltsov, S. Rana, M. N. Bera, G. Adesso, M. Lewenstein, Assisted distillation of quantum coherence, Phys. Rev. Lett. 116, 070402 (2016).
• Manabendra Nath Bera, Tabish Qureshi, Mohd Asad Siddiqui, Arun Kumar Pati, Duality of Quantum Coherence and Path Distinguishability, Phys. Rev. A 92, 012118 (2015).
• Alexander Streltsov, Uttam Singh, Himadri Shekhar Dhar, Manabendra Nath Bera, Gerardo Adesso, Measuring Quantum Coherence with Entanglement, Phys. Rev. Lett. 115.
020403 (2015).