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DTSTART;TZID=Asia/Kolkata:20251027T110000
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SUMMARY:6th Eminent Guest Lecture by Prof. Somnath Bhattacharyya
DESCRIPTION:The Office of Dean-Research is organising the 6th Eminent Guest Lecture on October 27\, 2025. Prof. Somnath Bhattacharyya\, Founder and Head of Nano-Scale Transport Physics Laboratory\, University of the Witwatersrand\, Johannesburg\, South Africa\, will deliver a distinguished lecture on “Diamond-Based Hybrid Qubit System for Quantum Computation Technology”. \nAbstract \nThere is a surge in exploring the best qubit platform for building efficient quantum computers suitable for complex operations. A qubit is analogous to the binary bit seen in a conventional computer. We show the potential for a diamond-based hybrid quantum system combining electrical (superconducting) and optical (nitrogen-vacancy centers) techniques. Superconducting qubit technology typically involves the fabrication of various logic elements based on Josephson junctions using standard superconducting materials such as Al or Nb. Boron-doped superconducting diamonds are\, however\, attractive due to better resistance to external perturbations. Considering a recent discovery of triplet-spin-based superconductivity in nanocrystalline diamond films and that diamond presents well-established quantum states in the form of nitrogen-vacancy centers (NV-centers)\, diamond demonstrates a potential platform for the realization of all diamond-based quantum circuitry. We advance the understanding of superconducting order parameters in boron-doped nanodiamond films and as a new type of qubit system through the design of the resonator and superconducting quantum interference devices. Quantum information can be exchanged between a superconducting diamond loop (with a phase-slip qubit junction) and an ensemble of spins (NV-centers) attached to a microwave line of the diamond nanowire\, which would allow us to initialize\, control through microwave circuitry\, and perform measurements via an optical interface. Moreover\, the diamond NV-centers offer ‘holonomic’ control of qubits for the acquisition of geometric phase\, which can be added to the hybrid qubit system. The holonomic control of qubits implemented in a ‘nine-level’ NV center is demonstrated by using IBM QP. This modeling shows a long coherence time of a system of multiple NV centersand also uses the multiple ‘dark’ states present in the NV centers. Such a hybrid quantum system will be useful for studying complex quantum many-body problems and quantum artificial intelligence or vision. \nAbout the Speaker \nProf. Somnath Bhattacharyya\, a Professor in Physics at Wits University\, Johannesburg\, since 2012\, founded the Nano-Scale Transport Physics Laboratory\, which pioneered quantum-nanotechnology in South Africa. His expertise includes superconducting carbon-based quantum technology\, qubit-circuit designing & testing\, quantum simulations\, and theoretical models. He demonstrated diamond-based quantum tunnel devices\, spin-triplet superconductivity\, diamond qubits\, and NV-center-based quantum technology.He published two books [“Evolution: Classical Philosophy meets Quantum Science” and “Carbon Superstructures: From Quantum Transport to Quantum Computation”]\, five book chapters\, and over 100 journal papers. He supervised 8 PhD\, 8MSc students\, 8postdocs\, established many international collaborations\, and founded a start-up company\, Quantumquest Technologies Pty. Ltd.
URL:https://events.srmap.edu.in/event/6th-eminent-guest-lecture-by-prof-somnath-bhattacharyya/
LOCATION:Theatre\, SR Block
CATEGORIES:Events,Homepage Events,Research Events
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