Quantum Optics with Free Electrons


  Ido Kaminer  
Department of Electrical and Computer Engineering and Solid-State Institute, Technion – Israel Institute of Technology, 32000 Haifa, Israel

Raphael Dahan  ,  Alexey Gorlach  ,  Gefen Baranes  ,  Ron Ruimy  ,  Yuval Adiv  ,  Aviv Karnieli  ,  Yaniv Kurman  

 

It is a long-standing goal to create light with unique quantum properties such as squeezing and entanglement. Most efforts have been focused on creating single- or few-photon quantum states, for their important applications in quantum technologies. Looking forward, there is a rising need to create many-photon quantum light states, for a widening range of applications, both classical and quantum. For example, many-photon quantum light can open bottlenecks in ghost imaging, precision measurements, quantum communication protocols, and photonic quantum computation.

 

We recently proposed a new approach to address this challenge: to utilize the nonlinear nature of electron-light interactions to generate desired quantum states of light. This approach is motivated by recent developments in electron microscopy, where our lab and other labs recently demonstrated the first quantum free-electron interactions with light in photonic cavities. A few months ago, our most recent experiment demonstrated the effect of quantum photon statistics on the interaction of electrons with light. This work shows the feasibility of the exciting new ideas in this emerging field of free-electron quantum optics.