OPTICAL QUANTUM NETWORKS WITH SINGLE YTTERBIUM IONS IN YV04
Abstract
The long-term goal of this research is to develop optical quantum repeater networks that will further advance probing the entanglement frontier. They will provide connectivity between future quantum computers, distribution of secure cryptographic keys at long distance, secure identification, and new platforms for quantum sensing. Creating these networks requires the following ingredients- (i) Single photon emitters with a coherent internal spin degree of freedom that can be entangled with the emitted photons. (ii) Nano-photonic resonators that can be coupled to the single photon emitter without degrading its optical coherence properties. (iii) An auxiliary memory qubit for storing the quantum entanglement while performing entanglement operations with other repeater nodes. Recently, Faraon group showed that single 171Yb3+ ions in YVO4 exhibit stable optical transitions in nano-photonic resonators, long spin coherence with high fidelity qubit control, single shot optical readout, and a local nuclear magnon-based quantum memory register. These findings showcase this system as a forefront technology for quantum networks. The next challenge, which is the technical goal of this project, is demonstrating remote entanglement generation between two 171Yb atoms located on two different chips. Towards this end, we will improve the photonic device by exploring new fabrication techniques and explore materials from other crystal growers that may exhibit better properties. Then we will demonstrate entanglement generation with rates on the order of ~10Hz and quantum correlations; we believe this can be achieved with the current generation of devices. To further increase the rate and fidelity up to ~300Hz (a factor of ~30 higher compared to the state of the art), we will improve the photon rate and indistinguishability by an order of magnitude.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 07, 2023
- Source ID
- FA95502210178
Entities
People
- Andrei Faraon
Organizations
- Air Force Office of Scientific Research
- California Institute of Technology
- United States Air Force