Kolkata's Bose Institute Develops New Protocol to Make Future Quantum Networks More Efficient

Kolkata: Scientists at Bose Institute, Kolkata have developed a new theoretical framework that could significantly improve the efficiency of future quantum communication networks, enabling stronger long-distance connections while using fewer network resources.

The study, carried out by Dr Deep Nath and Professor Soumen Roy of the institute's Department of Physical Sciences and published in the journal Physical Review A, introduces a protocol called General Concurrence Percolation (GCP), offering a more efficient approach to establishing quantum communication links than existing methods.

Quantum networks rely on entanglement to transmit information securely between distant locations, but maintaining strong entanglement over long distances is difficult, as environmental noise weakens the links during transmission. The new protocol lowers the minimum level of entanglement needed to connect an entire network, computer simulations showed, making such networks easier and potentially cheaper to build.

The researchers also demonstrated that the framework follows the percolation universality class, a well-established concept in statistical physics — strengthening the theoretical foundation for designing future quantum communication architecture. Bose Institute operates under India's Department of Science and Technology.