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Webinar Series on "Advances in Experimental Methods for Quantum Science and Technology"

Circular Rydberg atoms based quantum simulator, PC: CQED, LKB.
Artistic array of Rydberg atoms, PC: University of Stuttgart
Neutral atoms in optical lattices, PC: NIST
Quantum dot based Qubits, PC: QTech
Ion-trap schematic, PC: Innsbruck University
Superconducting Qubits, PC: IBM
NV Center schematic, PC: CNR

PC: IBM, University of Innsbruck, University of Sttutgart, QuTech and LKB

Welcome to our webinar series focused on experimental quantum physics, where we explore the latest research and developments in quantum technologies and conceptual foundations of quantum mechanics.

Speakers from leading quantum research institutions will present their research on topics such as quantum simulation, quantum-enhanced metrology, and quantum computing using different experimental platforms. They will share insights on the challenges and opportunities of working with complex systems and how they are pushing the boundaries of what is possible in the field of quantum technologies. State-of-the-art setups using different candidates, such as neutral atom qubits, superconducting qubits, trapped ions, spin-based qubits (QDs), and photonic devices, have unique advantages and challenges. With this webinar series, we will try to understand a comprehensive overview of their current status, future prospects with potential applications.

India is currently at the forefront of tapping the second quantum revolution through massive investments in the field and developing multiple quantum research hubs. Union Budget 2020-21 proposed to spend ₹8,000 crores ($ 1.2 billion) on the newly launched National Mission on Quantum Technologies and Applications (NMQTA). Our webinar series aims to build on this momentum by bringing together leading experts and researchers in the field to share their insights and knowledge with the Indian scientific community.

This webinar series is aimed at researchers, industry professionals, and graduate students interested in experimental quantum research. We invite you to join us on this exciting journey to explore the quantum world. We hope this webinar series will help to foster a vibrant and collaborative quantum research community and provide a platform to collaborate and trigger insightful discussions in the long term.

Research areas to be covered:

  • Foundations of quantum physics

  • Quantum technology:

    • Quantum simulation,

    • Quantum information and computing

    • Quantum networks

    • Quantum sensors

  • Based on experimental platforms:​

    •  Neutral atoms: Atoms in optical lattices, Rydberg atoms, Circular Rydberg atoms

    • Superconducting quantum circuits: Josephson junctions, Artificial atoms or quantum dots, and hybrid systems

    • Trapped ions

    • Nitrogen-vacancy center

    • Topological qubits

    • Ultracold molecules

    • Photonic qubits

    • Cavity QED

  • Interdisciplinary​

    • Quantum technology for high-energy physics and fundamental physics​

    • Quantum biology 

    • Quantum chemistry

Register here to get updates on upcoming seminars!


Akash Dixit

NIST, Colorado, USA

Superconducting Qubits for Dark-Matter Searches

Detection mechanisms for low-mass bosonic dark matter candidates, such as the axion or hidden photon, leverage potential interactions with electromagnetic fields, whereby the dark matter (of unknown mass) on rare occasions converts into a single photon. Current dark matter searches operating at microwave frequencies use a resonant cavity to coherently accumulate the field sourced by the dark matter and a near-standard quantum limited (SQL) linear amplifier to read out the cavity signal. To further increase sensitivity to the dark matter signal, sub-SQL detection techniques are required. Here we report the development of a novel microwave photon counting technique and a new exclusion limit on hidden photon dark matter. We operate a superconducting qubit to make repeated quantum non-demolition measurements of cavity photons and apply a hidden Markov model analysis to reduce the noise to 15.7 dB below the quantum limit, with overall detector performance limited by a residual background of real photons. This demonstrated noise reduction technique enables future dark matter searches to be sped up by a factor of 1,300. By coupling a qubit to an arbitrary quantum sensor, more general sub-SQL metrology is possible with the techniques presented in this work. A. V. Dixit, et. al. Phys. Rev. Lett. 126, 141302.

2nd May 2023, 20:30 IST  [Zoom link will be shared via email]


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