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.
qubit
quantum acoustics
in-flight manipulation
phonon
superconducting circuits
surface acoustic wave
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
Indian Institute of Science
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology
Haruki Sanada
Nippon Telegraph and Telephone Corporation
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
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 123013Subject Categories
Atom and Molecular Physics and Optics
Other Physics Topics
Other Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1088/1367-2630/ab5ca5