Author(s): Prasanna Paithankar, Amritash Sharma, Sauradeep Kar, and Shailendra Varshney Random number generators are an integral part of any cryptographic system. The security of the cryptographic system depends on the quality of the random number generators. In this work, we demonstrate a high-entropy (more than 0.95 bits/bit) photon number source using a femtosecond pulsed laser that… [Phys. Rev. Applied 25, 014039] Published Fri Jan 16, 2026