CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Local probing of propagating acoustic waves in a gigahertz echo chamber

Martin V. Gustafsson (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; Paulo V. Santos ; Göran Johansson (Institutionen för mikroteknologi och nanovetenskap, Tillämpad kvantfysik) ; Per Delsing (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik)
Nature Physics (1745-2473). Vol. 8 (2012), 4, p. 338–343.
[Artikel, refereegranskad vetenskaplig]

In the same way that micro-mechanical resonators resemble guitar strings and drums, surface acoustic waves resemble the sound these instruments produce, but moving over a solid surface rather than through air. In contrast with oscillations in suspended resonators, such propagating mechanical waves have not before been studied near the quantum mechanical limits. Here, we demonstrate local probing of surface acoustic waves with a displacement sensitivity of 30 amRMS Hz^(−1/2) and detection sensitivity on the single-phonon level after averaging, at a frequency of 932 MHz. Our probe is a piezoelectrically coupled single-electron transistor, which is sufficiently fast, non-destructive and localized to enable us to track pulses echoing back and forth in a long acoustic cavity, self-interfering and ringing the cavity up and down. We project that strong coupling to quantum circuits will enable new experiments, and hybrids using the unique features of surface acoustic waves. Prospects include quantum investigations of phonon–phonon interactions, and acoustic coupling to superconducting qubits for which we present favourable estimates.

Nyckelord: Surface acoustic wave, SAW, phonon, single-electron transistor, SET, RF-SET



Den här publikationen ingår i följande styrkeområden:

Läs mer om Chalmers styrkeområden  

Denna post skapades 2012-04-18. Senast ändrad 2015-02-04.
CPL Pubid: 156802

 

Läs direkt!


Länk till annan sajt (kan kräva inloggning)