Podcast: The puzzling structures of muddled materials, and paving the way for the quantum internet

Dragica Vasileska, Gerhard Klimeck, David K. Ferry

Tim Wogan

Researchers in the UK and Austria have demonstrated secure information exchange between multiple users spaced around a city.

Moushumi Barman, Gypsy Nandi

Dayang Li, R. Radhakrishnan, Nika Akopian

A physical platform for nodes of the envisioned quantum Internet is long-sought. Here we propose such a platform, along with a conceptually simple and experimentally uncomplicated quantum information processing scheme, realized in a system of multiple crystal-phase quantum dots. We introduce novel location qubits, describe a method to construct a universal set of all-optical quantum gates, and simulate their performance in realistic structures, including decoherence sources. Our results show that location qubits are robust against the main decoherence mechanisms, and realistic single-qubit gate fidelities exceed 99.9%. Our scheme paves a clear way toward constructing multiqubit solid-state quantum registers with a built-in photonic interface─a key building block of the forthcoming quantum Internet.

Thomas A. Brody