Quantum Optics and Entanglement Lab

Dr. Suman Karan has been awarded the OSI best thesis award in optical metrology in memory of Prof. M. P. Kothiyal at the SCOPOSIS-2025 conference. Many congratulations to Dr. Suman Karan for this outstanding achievement.

Click here to read the article:Navbharat Times (The Times of India). In this article Navbharat Times highlights an interview with Anand K. Jha, in which he shares his insights on quantum physics and discusses the ongoing research at the QOE lab, IIT Kanpur.

QOE Lab members visited University of Rochester for Coherence and Quantum Science 12 Conference. It was an amazing week at Rochester. They went for a trip to Niagara Falls too. Check the pictures in Gallery tab.

Warmest congratulations to Suman for receiving the prestigious Best Thesis Award from IIT Kanpur. This outstanding accomplishment reflects his dedication and scholarly excellence. All the best to Suman for his future endeavors.

Warmest congratulations to Keval for receiving the prestigious proficiency medal from IIT Kanpur for doing the best undergraduate project. All the best to Keval for his future endeavors.

Warmest congratulations to Suman for successfully defending his doctoral thesis with teh title: Efficient generation and measurement of high-dimensional OAM states for photonic quantum technologies.

This innovation has been developed by Prof. Anand K. Jha and senior project scientist Dr. Suman Karan at IIT Kanpur. This device can rotate any wavefront by 360 degrees while keeping the angular deviation to be less than one mili-radian and the mean polarization change to be less than 5%. This device can have commercial implications for applications in OAM-based high-dimensional classical and quantum information and quantum imaging. This innovation is one of the key deliverables of the quantum imaging technical group, an initiative under the National Quantum Mission, DST, Govt. of India. [Read the paper: Applied Optics 63, 4552-4557 (2024)]

The broadband uniform efficiency OAM detector has been developed by Prof. Anand K. Jha and senior project scientist Dr. Suman Karan at IIT Kanpur. This detector measures OAM spectrum of classical and single-photon fields with 98% fidelity with more than 100-dimensional mode-spectrum. This innovation is one of the key deliverables of the quantum imaging technical group, an initiative under the National Quantum Mission, DST, Govt. of India. [Read the paper: Science Advances 11, eadq7201 (2025)]

We celebrate the 10-year anniversary of the Quantum Optics and Entanglement Lab. Our deepest gratitude extends to each member, past and present, whose contributions have shaped our journey. For a decade, our lab has passionately delved into the realms of coherence and quantum entanglement, focusing on Orbital Angular Momentum (OAM), spatial, and radial degrees of freedom. We are committed to making meaningful contributions to quantum metrology, information, communication, and imaging.

Suman and Radhika presented their research at the FIO conference. Suman presented a poster highlighting his recent work titled : Broadband uniform-efficiency OAM detector , while Radhika delivered a talk on her recent work titled : Structuring two-photon correlation of entangled field: experimental demonstration . Congratulations to both of them.

Suman recieved the Best Poster Award at the international conference Photonics 2023 held at IISC Bangalore, India, during 5-8 July 2023. In the poster, he presented his recent work on Broadband uniform-efficiency OAM detector. Many congratulations to Suman and the co-authors for their contribution.

Prof. Siddharth Ramachandran from Boston University visited the Quantum Optics and Entanglement Lab. Prof. Ramachandran is a distinguished faculty in the department of Engineering (ECE, Physics, MSE) and will be associated with IIT kanpur as a visiting faculty for the next two years.

Heartfelt congratulations to Pranay for being awarded, prime-minister's research fellowship (PMRF), the most prestigious doctoral fellowship in India. Prany's doctoral research is focussed on spatial two photon coherence and entanglement and its applications in quantum imaging, sensing, and metrology.

Heartfelt congratulations to Nilakshi for being awarded, prime-minister's research fellowship (PMRF), the most prestigious doctoral fellowship in India. Nilakshi's doctoral research is focussed on multiphoton high-dimensioanl entanglement. Nilakshi plans to explore the orbital angular momentum of light and exploit if for quantum information applications.

Prof. Miguel Alonso from Aix Marseille Université, France, and the University of Rochester, Rochester, USA, visited the Quantum Optics and Entanglement Lab at IIT Kanpur. He is joining IIT Kanpur as a visiting faculty for a period of one year under VAJRA scheme of the SERB, department of science and technology. We look forward to a fruitful collaboration and academic exchange.

Suman presented his latest research at the ICOAM 2022 conference, held at Tampere University in Finland during 12-17 June, 2022. Suman presented a poster on his recent work with the title : Controlled generation of high-dimensional OAM entangled state without postselection . Many congratulations to Suman.

Suman was awarded the esteemed OPTICA travel grant to attend the ICOAM 2022 conference. Many congratulations to Suman.

Warmest congratulations to Abhinandan for receiving the prestigious Best Thesis Award from IIT Kanpur. This outstanding accomplishment reflects his dedication and scholarly excellence. All the best to Abhinandan for his future endeavors!

Warmest congratulations to Abhinandan for successfully defending his doctoral thesis with the title: Spatial coherence and entanglement in optical fields: Generation, measurement, and application.

Warmest congratulations to Girish for receiving the prestigious ISAMP Best Thesis Award for the year 2020 from Indian Society of Atomic and Molecular Physics.

Warmest congratulations to Girish for receiving the prestigious Best Thesis Award from IIT Kanpur. This outstanding accomplishment reflects his dedication and scholarly excellence. All the best to Girish for his future endeavors!

Warmest congratulations to Girish for successfully defending his doctoral thesis with the title: Novel tools for characterizing photon correlations in parametric down-conversion.