Funded by the Advanced Scientific Computing Research (ASCR) division of the U.S. Department of Energy’s Office of Science, the Quantum Application Network Testbed for Novel Entanglement Technology (QUANT-NET) project brings together world-leading experts from Lawrence Berkeley National Laboratory (Berkeley Lab), University of California, Berkeley (UC Berkeley), the California Institute of Technology, and the University of Innsbruck to construct a testbed for quantum networking technologies.
The project’s goal is to establish a three-node distributed quantum computing network between Berkeley Lab and UC Berkeley, connected with an entanglement swapping substrate over optical fiber and managed by a quantum network protocol stack. On top of this entanglement swapping substrate, the research team will implement the most basic building block of distributed quantum computing and quantum repeater by teleporting a controlled-NOT gate between two far trapped-ion nodes.
Figure 1: The planned three-node distributed quantum computing network at Berkeley.
The QUANT-NET research efforts focus on three areas:
Repeater-friendly quantum-node technologies, which include researching and developing trapped-ion quantum node (i.e., quantum computer) and color-center based single-photon source;
Quantum frequency conversion of ion-compatible narrow-bandwidth photons at near-infrared 854 nm to the telecom C-band at 1550 nm;
Quantum network control, architecture and protocol stacks.
The project also explores heterogeneity and a path toward scalability by researching and developing silicon color center-based quantum technologies that can be used in future quantum repeater platforms.
Figure 2: Distributed quantum computing between remote trapped-ion nodes.