Optical interfaces for quantum communications: frequency multiplexing and hybrid protocols

Event image
July 30, 2024, 04:00 PM - 05:00 PM

Venue

Seminar Room No. 31, 2nd Floor, Main Academic Building, IISER, Pune

Speakers

Dr. Tanmoy Chakraborty, PRL Ahmedabad

Abstract

I-HUB QUANTUM TECHNOLOGY FOUNDATION

presents......

I-HUB QTF Quantum Seminar Series

Optical interfaces for quantum communications: frequency multiplexing and hybrid protocols

In entanglement distribution-based quantum repeaters, one of the key resources is optically mediated entanglement between distant qubits which can be addressed and controlled individually. Next to optical quantum memories, most quantum repeater architectures also require multiplexed sources of photon pairs and photon detection mechanisms that can distinguish between the multiplexed modes. The speaker will present the development of a novel alignment-free, frequency multiplexed photon pair source that is based on fiber-pigtailed, cavity-enhanced spontaneous parametric down-conversion (SPDC) in a nonlinear crystal and is easy to integrate with a practical quantum repeater.

Dr. Chakraborty will also present the design and implementation of a novel demultiplexing setup for frequency-resolved detection of the photons. He will show the characterization of multiple pairs of spectrally-resolved modes, as required for a quantum repeater and demonstrate the optical interface of our single photon source with Thulium-based quantum memory. Moreover, he will present hybrid quantum interfaces between nitrogen vacancy (NV) center in diamond-based quantum network nodes and 795 nm photonic time-bin qubits, compatible with thulium and rubidium quantum memories.

NQM Startups Announcement Ceremony

Ceremony Picture

We are thrilled to announce the unveiling of groundbreaking startups at the NQM Startups Announcement Ceremony held on 26th November 2024. These innovative ventures, poised to revolutionize industries, mark a significant milestone in driving the future of entrepreneurship in the field of Quantum Technologies.

The event was graced by the Honourable Minister of State for the Ministry of Science and Technology and Earth Sciences, Shri Jitendra Singh, who felicitated the startups and acknowledged their transformative potential.

The ceremony also witnessed the esteemed presence of:

Shri Abhay Karandikar, Secretary, DST
Dr. Ajai Chowdhry, Chairman, MGB, NQM
Dr. Kris Gopalakrishnan, Chairman, MGB, NM-ICPS
Dr. V.K. Saraswat, Hon’ble Member (S&T), NITI Aayog
Prof. Sunil Bhagwat, Director, IISER Pune

Congratulations to all the startup founders and their teams! We are excited to witness their journey and the transformative impact they will bring to the industry. Stay tuned for more updates as these startups progress toward a brighter future.

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