Subject: [Qirg] "modular architecture" for quantum networks

From: Rodney Van Meter <[email-masked]>
Date: Tue, 17 Jul 2018 11:32:23 +0900

A paper from the group of Wolfgang Dur, one of the inventors of the idea of quantum repeaters:
http://iopscience.iop.org/article/10.1088/1367-2630/aac2aa/meta <http://iopscience.iop.org/article/10.1088/1367-2630/aac2aa/meta>

Entangled quantum states can be two *or more* qubits in shared state, correlated in ways that go beyond what classical probabilities can do. My group has (mostly) focused on two-qubit entanglement, known as “bipartite” entanglement. In this paper, Pirker & co. are looking at making 3-qubit or larger entangled states that span multiple nodes.

They use what are known as “graph states”, a specific kind of entangled state. If you don’t follow the math in the paper on those, ping me and I’ll do my best.

Sections 2.4-2.6 of the paper do a pretty good job of laying out some of the key concepts in networks.

		—Rod