Towards phonon routing: controlling propagating acoustic waves in the quantum regime
Journal article, 2019

We explore routing of propagating phonons in analogy with previous experiments on photons. Surface acoustic waves (SAWs) in the microwave regime are scattered by a superconducting transmon qubit. The transmon can be tuned on or off resonance with the incident SAW field using an external magnetic field or the Autler-Townes effect, and thus the reflection and transmission of the SAW field can be controlled in time. We observe 80% extinction in the transmission of the low power continuous signal and a 40 ns rise time of the router. The slow propagation speed of SAWs on solid surfaces allows for in-flight manipulations of the propagating phonons. The ability to route short, 100 ns, pulses enables new functionality, for instance to catch an acoustic phonon between two qubits and then release it in a controlled direction.

surface acoustic wave

quantum acoustics

phonon

qubit

in-flight manipulation

superconducting circuits

router

Author

Maria Ekström

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology

Thomas Aref

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Andreas Josefsson Ask

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Gustav Andersson

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology

Baladitya Suri

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology

Indian Institute of Science

Haruki Sanada

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Nippon Telegraph and Telephone Corporation

Göran Johansson

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Per Delsing

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology

New Journal of Physics

1367-2630 (ISSN)

Vol. 21 12 123013

Subject Categories

Atom and Molecular Physics and Optics

Other Physics Topics

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1088/1367-2630/ab5ca5

More information

Latest update

5/6/2020 7