Towards a trapped electron quantum computer

Presenting Author: Qian Yu, University of California Berkeley
Contributing Author(s): Clemens Matthiesen, Timothy Guo, Alberto Alonso, Kristin Beck, Robert Tyler Sutherland, Dietrich Leibfried, Jackie Caminiti, Kayla Rodriguez, Madhav Dhital, Boerge Hemmerling, Hartmut Häffner

One of the most established physical implementations of quantum computing is trapped ions in Paul traps. Here we study electrons trapped in Paul traps as an attractive alternative to trapped ions. Their extremely light mass leads to faster operations, their simple two-level spin structure avoids leakage into other energy levels, and they can be manipulated with well-established microwave technology, removing some of the optical engineering challenges required to build a large-scale quantum computer with trapped ions. The first step towards this goal is to trap and detect electrons in a Paul trap. This talk will present our recent results on trapping electrons in a room-temperature quadrupole Paul trap. We loaded cold electrons into the trap by photoionization of atomic calcium and successfully confined them with microwave and static electric fields for several tens of milliseconds. A fraction of these electrons remains trapped longer and show no measurable loss for measurement times up to a second. Electronic excitation of the motion reveals secular frequencies which can be tuned over a range of several tens to hundreds of MHz. Our recent work shows that operating a similar electron Paul trap in a cryogenic environment may provide a platform for quantum computing with trapped electrons.

Read this article online: https://doi.org/10.1103/PhysRevX.11.011019

(Session 6 : Friday from 3:30pm-3:50pm)


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