BBQLab @ QCMC22

Mehul presenting a talk at QCMC 2022

We recently had the privilege of attending the 15th International Conference on Quantum Communication, Measurement and Computing (QCMC) in beautiful Lisbon, Portugal. The conference was held in the Calouste Gulbenkian Museum, an incredible venue surrounded by lush gardens. Mehul presented a joint talk with Marcus Huber on “High-Dimensional Entanglement for Quantum Communication” and there was a strong showing in the poster session with posters from Suraj, Natalia, Sabine, and Mehul. A big congratulations to Andreas Winter for winning the prestigious International Quantum Award, along with Giacomo Mauro D’Ariano and Mikhail Lukin. We are looking forward to QCMC 2024 in Chennai, India!

Starting off the conference with some Vinho Verde!

QST: Quantum Research Mobility

In our new paper titled Quantum researcher mobility: the wonderful wizard of Oz who paid for Dorothy’s visa fees, published in the IOP journal Quantum Science and Technology, we discuss the many hurdles facing international researcher mobility today. We tackle issues such as exorbitant visa fees, short-term contracts, and cultural hurdles to mobility. Most importantly, we discuss many examples of good practice from around the world and propose possible solutions to overcome such hurdles. This work was done in collaboration with Eliza Agudelo from TU Vienna and Ravi Kunjwal from Universit√© libre de Bruxelles.

BBQLab @ ICOAM2022

Tampere, Finland at 11:30 PM!

Natalia and Mehul recently represented BBQLab at the 6th International Conference on Optical Angular Momentum in Tampere, Finland. It was a fantastic event, bringing together a diverse group of researchers from around the world working on structured photons, electrons, ions, and neutrons! Natalia won the second prize in the hotly contested ICOAM poster competition for her submission on entangled ripples and twists of light. Mehul presented an invited talk on our recent work on programming high-dimensional quantum optical circuits inside a complex medium. We are looking forward to ICOAM2024 in South Africa!

Congratulations to Natalia for winning 2nd prize in the ICOAM poster competition!
One of the many beautiful lakes around Tampere (photo taken from the Viikinsaari island, venue for the ICOAM conference dinner)

arXiv: Programming quantum circuits in a complex medium

Experimental setup and results for a five-dimensional discrete Fourier gate

In a recent paper on the arXiv, we show how high-dimensional quantum optical circuits can be programmed inside a commercial multi-mode fibre through the use of inverse-design techniques. Using these methods, we were able to demonstrate the transport, manipulation, and measurement of high-dimensional photonic entanglement by using the transmission channel itself!

We also present numerical results on the scalability of our approach, showing how the resource of a high-dimensional mode-mixer allows perfect and lossless circuits to be realised in principle. By harnessing something as simple as light scattering inside a multi-mode fibre, our work serves as a new, yet practical alternative to integrated photonic platforms.

This work was done in collaboration with our QuantERA project partners Claudio Conti (La Sapienza, Rome) and Pepijn Pinkse (Uni Twente, Netherlands). We look forward to many more exciting collaborations in the future!