Produced by: Tarun Mishra
Scientists at the Raman Research Institute (RRI) have identified optimal locations in India for transmitting quantum signals into space. This research marks a step forward in satellite-based quantum communication and was published in EPJ Quantum Technology.
The study highlights the potential of quantum key distribution (QKD), a technology that uses quantum signals to enhance the security of global communication networks.
Quantum signals, used in communication and computing, are based on quantum mechanics, which governs the behavior of particles like photons and electrons at microscopic scales.
Researchers analyzed data from three observatory locations in India: the Indian Astronomical Observatory (IAO) in Hanle (Ladakh), Mt. Abu (Rajasthan), and the Aryabhatta Institute of Observational Sciences (ARIES) in Nainital (Uttarakhand).
Hanle, located in Ladakh's high-altitude desert, was identified as the most suitable site for quantum signal transmission. Its dry climate and minimal atmospheric water vapor make it an ideal location.
The study underscores the importance of understanding atmospheric conditions, turbulence, and high-precision telescope operations to enable satellite-based quantum communication.
Professor Urbasi Sinha, who leads the Quantum Information and Computing (QuIC) lab at RRI, highlighted Hanle's natural advantages for establishing a ground station to support long-distance quantum communication.
Credit: Raman Research Institute
This advancement aligns with India’s push to lead in quantum technologies and secure communication systems. The findings emphasize interdisciplinary research as critical to the success of satellite-based quantum communication efforts.