Publications

2026

1. 

   Developing quantum networks: some key innovations

   Nilesh Sharma, Saravana Vilashini, Gopala Krishnan, Anagha Gayathri, Ashutosh Kumar Singh, Vaibhav Pratap Singh, Valliamai Ramanathan, Prabha Mandayam, and Anil Prabhakar

   Quantum Information Processing, Jan 2026

   DOI

2025

1. IEEE PJ

   

   Backflash Attack on Coherent One-Way Quantum Key Distribution

   Ashutosh Kumar Singh, Nilesh Sharma, Vaibhav Pratap Singh, and Anil Prabhakar

   IEEE Photonics Journal, Jan 2025

   DOI Bib

   @article{10947506,
     author = {Singh, Ashutosh Kumar and Sharma, Nilesh and Singh, Vaibhav Pratap and Prabhakar, Anil},
     journal = {IEEE Photonics Journal},
     title = {Backflash Attack on Coherent One-Way Quantum Key Distribution},
     year = {2025},
     volume = {17},
     number = {2},
     pages = {1-6},
     keywords = {Photonics;Single-photon avalanche diodes;Logic gates;Protocols;Timing;Optical pulses;Optical attenuators;Histograms;Detectors;Radio frequency;Attacks in quantum cryptography;backflash;eavesdropping},
     doi = {10.1109/JPHOT.2025.3557214}
   }

2. IEEE PJ

   

   Generation of Tunable Correlated Frequency Comb via Four-Wave-Mixing in Optical Fibers

   Aryan Bhardwaj, Debanuj Chatterjee, Ashutosh Kumar Singh, and Anil Prabhakar

   IEEE Photonics Journal, Jan 2025

   DOI Bib

   @article{10924403,
     author = {Bhardwaj, Aryan and Chatterjee, Debanuj and Singh, Ashutosh Kumar and Prabhakar, Anil},
     journal = {IEEE Photonics Journal},
     title = {Generation of Tunable Correlated Frequency Comb via Four-Wave-Mixing in Optical Fibers},
     year = {2025},
     volume = {17},
     number = {3},
     pages = {1-6},
     keywords = {Optical fibers;Optical fiber amplifiers;Photonics;Optical fiber networks;Optical fiber dispersion;Pump lasers;Sagnac interferometers;Optical fiber filters;Optical fiber couplers;Optical frequency conversion;Four-wave mixing;mode-locked laser;highly non-linear fiber;optical fiber networks;photon pairs;frequency comb;temporal correlation;phase-matching;fiber non-linear optics;split-step fourier method;quantum information;optical spectrum analyzer;coincidence measurement},
     doi = {10.1109/JPHOT.2025.3550712}
   }

2025

1. 

   Quantum Money Using Differential Phase Encoding

   Ashutosh Kumar Singh, Nilesh Sharma, Vaibhav Pratap Singh, Anil Prabhakar, and Sridhar Tayur

   In Optica Quantum 2.0 Conference and Exhibition, 2025

   DOI Bib

   @inproceedings{AKSingh:25,
     author = {Singh, Ashutosh Kumar and Sharma, Nilesh and Singh, Vaibhav Pratap and Prabhakar, Anil and Tayur, Sridhar},
     booktitle = {Optica Quantum 2.0 Conference and Exhibition},
     journal = {Optica Quantum 2.0 Conference and Exhibition},
     keywords = {Interferometers; Phase; Photon counting; Quantum key distribution networks; Silicon; Superconducting nanowire single photon detectors},
     pages = {QW3A.16},
     publisher = {Optica Publishing Group},
     title = {Quantum Money Using Differential Phase Encoding},
     year = {2025},
     url = {https://opg.optica.org/abstract.cfm?URI=QUANTUM-2025-QW3A.16},
     doi = {10.1364/QUANTUM.2025.QW3A.16}
   }

2. 

   A Novel and Agile Trusted Relay Scheme for Long Distance QKD Networks

   Vaibhav Pratap Singh, Ashutosh Kumar Singh, and Anil Prabhakar

   In Optica Quantum 2.0 Conference and Exhibition, 2025

   DOI Bib

   @inproceedings{VPSingh:25,
     author = {Singh, Vaibhav Pratap and Singh, Ashutosh Kumar and Prabhakar, Anil},
     booktitle = {Optica Quantum 2.0 Conference and Exhibition},
     journal = {Optica Quantum 2.0 Conference and Exhibition},
     keywords = {Crosstalk; Detectors; Network topology; Quantum key distribution; Quantum key distribution networks},
     pages = {QW3A.4},
     publisher = {Optica Publishing Group},
     title = {A Novel and Agile Trusted Relay Scheme for Long Distance QKD Networks},
     year = {2025},
     url = {https://opg.optica.org/abstract.cfm?URI=QUANTUM-2025-QW3A.4},
     doi = {10.1364/QUANTUM.2025.QW3A.4}
   }

3. 

   MAQAN: India’s Quantum Network Testbed

   Vaibhav Pratap Singh, Anurag Dutt, Ashutosh Kumar Singh, Foram Shingala, Sajimon P. C., Yashwant Reddy, Abhishek Singh Rao, Mohd. Razin Ashfaque, Natarajan Venkatachalam, Aneesh Kumar K. B., Haribabu P, Sudarsan S D, and Anil Prabhakar

   In 2025 IEEE International Conference on Quantum Computing and Engineering (QCE), 2025

   DOI

4. 

   Digital Twin of Metro Area Quantum Access Network

   Vaibhav Pratap Singh, Abhishek Singh Rao, Ashutosh Kumar Singh, Sajimon P. C., Anurag Dutt, Nilesh Sharma, Aneesh Kumar K. B., and Anil Prabhakar

   In 2025 IEEE Photonics Conference (IPC), 2025

   DOI
5. GPU-Based Digital Annealing for Accelerating Large-Scale Combinatorial Optimization

   Nistala Krishna Vamsi, Ashutosh Kumar Singh, and Anil Prabhakar

   In 2025 Supercomputing India (SCI), 2025

   DOI

2024

1. 

   Phase Matching for SHG and SPDC in all fibre-based PPLN waveguide

   Ashutosh Kumar Singh, Ravi Mehta, and Anil Prabhakar

   2024

   Poster presentation at QCMC 2024

   Bib PDF

   @unpublished{AKSingh2023Postes,
     author = {Singh, Ashutosh Kumar and Mehta, Ravi and Prabhakar, Anil},
     title = {Phase Matching for SHG and SPDC in all fibre-based PPLN waveguide},
     note = {Poster presentation at QCMC 2024},
     year = {2024},
   }

2023

1. 

   Multiplexing quantum and classical light in fibre-based QKD

   Ashutosh Kumar Singh and Anil Prabhakar

   2023

   Poster presentation at Photonics 2023, IISc Bangalore

   Bib PDF

   @unpublished{AKSingh2023Poster,
     author = {Singh, Ashutosh Kumar and Prabhakar, Anil},
     title = {Multiplexing quantum and classical light in fibre-based QKD},
     note = {Poster presentation at Photonics 2023, IISc Bangalore},
     year = {2023},
   }