Quantum Photonics in the Frequency Domain
QuanTAU Club Seminar - joint with LMI | Speaker: Prof. Alex Gaeta
You are invited to QuanTAU Club Seminar - joint with LMI
Quantum Photonics in the Frequency Domain
Speaker: Prof. Alex Gaeta, Columbia University
Wednesday, 28 Oct 2026
Time: 13:00 (light lunch at 12:30)
Location: Nano Seminar Room (1st floor, nano building)
Abstract
In quantum photonics, the frequency domain can serve as a synthetic dimension, offering advantages over the spatial and time domains for quantum information processing. Quantum frequency conversion is the process by which the wavelength of a quantum light field is converted to another wavelength, enabling operation in the frequency domain.
I will describe our recent research that uses the nonlinear optical process of four-wave mixing to achieve ultralow-noise quantum frequency conversion with efficiencies approaching 100%. Such a nonlinear process allows us to use the frequency domain as a synthetic dimension to demonstrate frequency qubits, Hong-Ou-Mandel interference, quantum communication, and an N-way beamsplitter.
