Publications

 

2023
Free space continuous variable Quantum Key Distribution with discrete phases

Anju Rani, Pooja Chandravanshi, Jayanth Ramakrishnan, Pravin Vaity, P. Madhusudhan, Tanya Sharma, Pranav Bhardwaj, Ayan Biswas & R.P. Singh
Physics Open 17, 100162 (2023)

Vulnerability in Free Space QKD Due to Detection Coupling Mismatch

Tanya Sharma, Ayan Biswas, Pooja Chandravanshi, Shashi Prabhakar & Ravindra P. Singh
IEEE Journal of Quantum Electronics 59, 8000707 (2023)

Use of Non-Maximal entangled state for free space BBM92 quantum key distribution protocol

Ayan Biswas, Sarika Mishra, Satyajeet Patil, Anindya Banerji, Shashi Prabhakar, Ravindra P. Singh
arXiv:2307.02149 (2023)

Endless fun in high dimensions - A quantum card game

Lea Kopf, Markus Hiekkamäki, Shashi Prabhakar, & Robert Fickler
American Journal of Physiscs 91, 458 (2023)

Polarization-orbital angular momentum duality assisted entanglement observation for indistinguishable photons

Nijil Lal, Sarika Mishra, Anju Rani, Anindya Banerji, Chithrabhanu Perumangattu & R. P. Singh
Quantum Information Processing 22, 90 (2023)

Anisotropic spatial entanglement

Satyajeet Patil, Shashi Prabhakar, Ayan Biswas, Ashok Kumar, & Ravindra P. Singh
Physics Letters A 457, 128583 (2023)

2022
Quantum key distribution with multiphoton pulses: an advantage

Ayan Biswas, Anindya Banerji, Nijil Lal, Pooja Chandravanshi, Rupesh Kumar & Ravindra P. Singh
Optics Continuum 1, 68-79 (2022)

BBM92 quantum key distribution over a free space dusty channel of 200 meters

Sarika Mishra, Ayan Biswas, Satyajeet Patil, Pooja Chandravanshi, Vardaan Mongia, Tanya Sharma, Anju Rani, Shashi Prabhakar, S Ramachandran & Ravindra P Singh
Journal of Optics 24, 074002 (2022)

Indistinguishable photons

Nijil Lal, Sarika Mishra, & R P Singh
AVS Quantum Science 4, 021701 (2022)

2021
Experimental Side Channel Analysis of BB84 QKD Source

Ayan Biswas, Anindya Banerji, Pooja Chandravanshi, Rupesh Kumar & Ravindra P. Singh
IEEE Journal of Quantum Electronics 57, 8000207 (2021)

Size-invariant twisted optical modes for the efficient generation of higher-dimensional quantum states

Ali Anwar, Shashi Prabhakar & R. P. Singh
Journal of the Optical Society of America B 38, 2976 (2021)

2020
Selective tuning of Hilbert spaces in states encoded with spatial modes of light

Ali Anwar, Nijil Lal, Shashi Prabhakar & R. P. Singh
New Journal of Physics 22, 113020 (2020)

Photon statistics of twisted heralded single photons

Nijil Lal, Anindya Banerji, Ayan Biswas, Ali Anwar & R. P. Singh
Journal of Modern Optics 67, 126 (2020)

2019
Observing sub-Poissonian statistics of twisted single photons using oscilloscope

Nijil Lal, Biveen Shajilal, Ali Anwar, Chithrabhanu Perumangatt & R. P. Singh
Review of Scientific Instruments 90, 113104 (2019)

Engineering of orbital angular momentum spectrum of down-converted photons with mode-invariant pump

Anindya Banerji, Ali Anwar, Hrushikesh Sable, Nijil Lal & R. P. Singh
arXiv preprint arXiv:1905.02554 (2019)

Controlling the bi-photon orbital angular momentum eigen modes using asymmetric pump vortex beam

MV Jabir, Ali Anwar & GK Samanta
Journal of Optics 21, 055201 (2019)

2018
Direct transfer of pump amplitude to parametric down-converted photons

Ali Anwar, Pravin Vaity, Chithrabhanu Perumangatt & R. P. Singh
Optics Letters 43, 1155 (2018)

2017
Quantum information with even and odd states of orbital angular momentum of light

Chithrabhanu Perumangatt, Nijil Lal, Ali Anwar, Salla Gangi Reddy & RP Singh
Physics Letter A 381, 1858 (2017)

Robust, high brightness, degenerate entangled photon source at room temperature

MV Jabir & Goutam K Samanta
Scientific Reports 7, 1-8 (2017)

Selecting the pre-detection characteristics for fiber coupling of parametric down-converted biphoton modes

Ali Anwar, P Chithrabhanu, Salla Gangi Reddy, Nijil Lal & R. P. Singh
Optics Communications 382, 219 (2017)

Direct transfer of classical non-separable states into hybrid entangled two photon states

M. V. Jabir, N. Apurv Chaitanya, Manoj Mathew & Goutam K Samanta
Scientific Reports 7, 7331 (2017)

Generation of “perfect” vortex of variable size and its effect in angular spectrum of the down-converted photons

M. V. Jabir, N. Apurv Chaitanya, Aadhi Abdul Rahim & Goutam K Samanta
Scientific Reports 6 7331 (2017)

2015
Three-particle hyper-entanglement: teleportation and quantum key distribution

Chithrabhanu Perumangatt, Aadhi Abdul Rahim, Gangi Reddy Salla, Shashi Prabhakar, Goutam Kumar Samanta, Goutam Paul & R. P. Singh
Quantum Information Processing 14, 3813 (2015)

Violation of Bell's inequality for phase-singular beams

Shashi Prabhakar, Salla Gangi Reddy, Aadhi Abdul Rahim, Ashok Kumar, Chithrabhanu Perumangatt, Goutam K Samanta & R.P Singh
Physical Review A 92, 023822 (2015)

2014
Spatial distribution of spontaneous parametric down-converted photons for higher order optical vortices

Shashi Prabhakar, Salla Gangi Reddy, Aadhi Abdul Rahim, Ashok Kumar, Chithrabhanu Perumangatt, Goutam K Samanta & R.P Singh
Optics Communications 326, 64 (2014)

2013
Annihilation of vortex dipoles in an oblate Bose-Einstein condensate

Shashi Prabhakar, R. P. Singh, S Gautam & Dilip Angom
Journal of Physics B: Atomic, Molecular and Optical Physics 46, 125302 (2013)

2011
Entanglement of a quantum optical elliptic vortex

Abir Bandyopadhyay, Shashi Prabhakar & R. P. Singh
Physics Letters A 375, 1926 (2011)