Upcoming Colloquium

  • Title of the talk: "Quantum Synchronization: A shared quantum rhythm"
    Speaker: Prof. Saikat Ghosh, Indian Institute of Technology, Kanpur, India
    Date & Time: 23 September 2020, 04:00 PM
    Platform: Google Meet link
    Facebook live streaming: #Physics_IITG
    Abstract of the talk:

    In this talk, we will discuss two seemingly disconnected but well studied topics and show how they can be connected towards observing a new physical effect. The first topic is a physical effect called synchronization, widely observable in nature everywhere and all the time. The second topic is related to the quantum world, where things behave very differently than what we see in our surrounding life. Recently, such quantum world behaviour is also being actively used towards building quantum computers and quantum communication devices. This has led to a new field of quantum technologies.

    After introducing these two topics, I will discuss what it means to observe such synchronization in the quantum world and what are the consequences of such quantum synchronization of spins and atoms in today's cutting-edge quantum technologies. I will end the seminar with a discussion of experimental results from our laboratory at IIT-Kanpur, that led to the very first observation of quantum synchronization.

    References:
    1. Arif Warsi Laskar, Niharika Singh, Arunabh Mukherjee and Saikat Ghosh, New J. Phys. 18, 053022 (2016).
    2. Arif Warsi Laskar, Niharika Singh, Pratik Adhikary, Arunabh Mukherjee and Saikat Ghosh Optica, 5, 1462 (2018).
    3. Arif Warsi Laskar, Pratik Adhikary, Suprodip Mondal, Parag Katiyar, Sai Vinjanampathy and Saikat Ghosh, Phys. Rev. Lett. 125, 013601 (2020).

Past Colloquium

    • Title of the talk: "Quantum Matter and P.W. Anderson (1923-2020)"
      Speaker: Prof. Ganapathy Baskaran, IMSc., Chennai, IIT Madras, Perimeter Institute of Theoretical Physics, Waterloo, Canada
      Date & Time: 16 September 2020, 04:00 PM
      Youtube Channel: Link to Talk
      Facebook live streaming: #Physics_IITG
      Abstract of the talk:

      Quantum matter refers to a piece of rusted iron, a grain of sand or a drop of water etc. By thinking deeply about these earthly materials and combining valuable clues from experimental results, P.W. Anderson, a theoretical physicist and a quantum mechanic par excellence helped discover some secrets of nature: origin of mass of elementary particles (electron etc.), glitches in pulsar periods, magnetism, superconductivity, science of complexity etc. His works exemplified hierarchical nature of science rather deeply. I will weave a story and share some personal anecdotal experiences with this remarkable and humane Nobel Laureate.

    • Title of the talk: "Dynamical Systems, Turbulence and Active Matter"
      Speaker: Prof. Jayanta K. Bhattacharjee, IACS, Kolkata
      Date & Time: 02 September 2020, 04:00 PM
      Youtube Channel: Link to Talk
      Facebook live streaming: #Physics_IITG
      Abstract of the talk:

      Turbulence in fluids has long been a difficult issue for theoreticians. The problem has been one of asking the right question to which an answer can be found in universal terms- a cherished goal of theorists. In 1941, Kolmogorov asked one such question and found an answer which is still not comfortably understood. A different set of questions ,which had experimental support, dealt with the problem of how a flow gradually becomes turbulent. This is where the dynamical system approach, initiated more than fifty years ago, was supposed to be an effective tool but did not quite fulfil one’s expectations. Recent applications to active matter suspensions raise some new hopes.

    • Title of the talk: "Satyendra Nath Bose : a Forgotten Hero"
      Speaker: Prof. Sreerup Raychaudhuri, TIFR, Mumbai
      Date & Time: 27 August 2020, 04:00 PM
      Youtube Channel: Link to Talk
      Facebook live streaming: #Physics_IITG
      Abstract of the talk:

      The life, times and scientific work of Satyendra Nath Bose (1894 - 1974) will be described in this talk. We shall start with an introduction to the quantum theory of blackbody radiation, where Bose made his epoch-making contribution. We will then take a look at the early life of Bose and the fertile intellectual milieu which created this man of genius. The story of his famous discovery of Bose statistics will then be taken up. The last part of the talk will be a panorama of Bose’s later life as a national celebrity, but a largely-forgotten figure on the international scene. We shall conclude with some critical comments on the story of this great scientist and his legacy.

    • Title of the talk: "Hunt for the Dark Matter of the Universe"
      Speaker: Dr. Subhaditya Bhattacharya of DEPARTMENT OF PHYSICS, IIT GUWAHATI
      Date & Time: 19 August 2020, 04:00 PM
      Youtube Channel: Link to Talk
      Facebook live streaming: #Physics_IITG
      Abstract of the talk:

      Dark Matter is the most illusive form of matter to constitute almost 23 percent energy budget of the universe. Compare it with roughly 4% of visible matter that we know of. Different astrophysical evidences have indicated the existence of Dark Matter although we have very little idea of what exactly it is. The talk will illustrate some possibilities what Dark Matter can be, as fundamental particle and what are the search strategies of Dark Matter in different experiments currently underway.

    • Title of the talk: "Understanding the biology of avian paramyxovirus for the development of recombinant vaccine"
      Speaker: Dr. Sachin Kumar of DEPARTMENT OF BIOSCIENCE AND BIOENGINEERING, IIT GUWAHATI
      Date & Time: 12 August 2020, 04:00 PM
      Youtube Channel Link to Talk
      Facebook live streaming: #Physics_IITG
      Abstract of the talk:

      Animal viruses are tiny packages of protein and nucleic acid. Avian paramyxovirus type 1 (APMV-1) causes Newcastle disease (ND) in chicken. ND is one of the highly pathogenic viral diseases of avian species. ND is economically significant because of mortality and morbidity associated with it. APMV-1 belongs to the family Paramyxoviridae and the genus Avulavirus. Recent advances in recombinant DNA techniques have brought forward to an era of new vaccine technology in modern medicine. One attractive strategy is the application of reverse genetics to make recombinant APMV (rAPMV). rAPMV can deliver protective antigens of pathogens in host and evoke a protective immune response. The rAPMV vaccine offers a pertinent choice for the construction of live attenuated vaccine due to its minimum recombination frequency, modular nature of transcription and lack of DNA phase during its replication. APMV is also explored widely in the field of cancer biology due to its property of replicating selectively in tumor cells. In the recent years, the reverse genetics technology allowed to generate rAPMV having high tumor suppressor property. By understanding APMV molecular biology, it is feasible to develop gene-modified recombinant vaccines possessing better safety and immunity for both animals and humans.