Photonics at MHz frequencies: Direct observation and quantum stabilization of photons in a hot radio-frequency resonator
The concept of a photon, a quantized packet of light, has been around since the first roots of quantum mechanics started to take hold, and is the origin of Planck’s constant, the physical constant that defines quantum mechanics. At optical frequencies, photons are commonplace in modern physics, with devices such as single photon detectors available off the shelf and found in many optics labs. The advent of superconducting artificial atoms in circuit quantum electrodynamics (cQED), the paradigm behind a highly popular quantum computing architecture, has brought the concepts of photons and photonics into the microwave regime.
In this talk, I will give a tutorial of what quantum superconducting circuits are and how they work, and tell you about a new effort in our group to extend experiments in “photonics” (quantized electromagnetic fields) down to megahertz frequencies, a new unexplored regime of quantum electrodynamics with potential applications ranging from quantum sensing of radio-frequency fields to quantum control of low-frequency systems such as spin ensembles and mechanical resonators.