Linke, Norbert

Date:   Thursday, June 28, 2018
Time:   15:00
Place:  ETH Zurich, Hönggerberg, HPF G 6
Hosts: Matt Grau / Jonathan Home

A programmable quantum computer based on trapped ions

Norbert Linke
Joint Quantum Institute, University of Maryland, USA

Trapped ions are a promising candidate system to realize a scalable quantum computer. We present a modular quantum computing architecture comprised of a chain of 171Yb+ ions with individual Raman beam addressing and individual readout [1]. We use the transverse modes of motion in the chain to produce entangling gates between any qubit pair. This creates a fully connected system which can be configured to run any sequence of single- and two-qubit gates, making it in effect an arbitrarily programmable quantum computer that does not suffer any swap-gate overhead [2]. 

Recent results from different quantum algorithms on five and seven ions will be presented [3], including current work in quantum machine learning. I will also discuss schemes to scale up this architecture, as well as other ideas for the future [4].

[1] S. Debnath et al., Nature 563:63 (2016)
[2] NML et al., PNAS 114 13:3305 (2017)
[3] NML et al., arXiv:1712.08581 (2017)
[4] S. Debnath et al., PRL, 073001 (2018)