Abstract
| Language | English |
|---|---|
| Article number | 156801 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 102 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - 17 Apr 2009 |
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Keywords
- surface acoustic waves
- quantum dots
- computation
- channel
- states
- spin
Cite this
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Coherent time evolution of a single-electron wave function. / Kataoka, M.; Astley, M.R.; Thorn, A.L.; Oi, D.K.L.; Barnes, C.H.W.; Ford, C.J.B.; Anderson, D.; Jones, G.A.C.; Farrer, I.; Ritchie, D.A.; Pepper, M.
In: Physical Review Letters, Vol. 102, No. 15, 156801 , 17.04.2009.Research output: Contribution to journal › Article
TY - JOUR
T1 - Coherent time evolution of a single-electron wave function
AU - Kataoka, M.
AU - Astley, M.R.
AU - Thorn, A.L.
AU - Oi, D.K.L.
AU - Barnes, C.H.W.
AU - Ford, C.J.B.
AU - Anderson, D.
AU - Jones, G.A.C.
AU - Farrer, I.
AU - Ritchie, D.A.
AU - Pepper, M.
PY - 2009/4/17
Y1 - 2009/4/17
N2 - Observation of coherent single-electron dynamics is severely limited by experimental bandwidth. We present a method to overcome this using moving quantum dots defined by surface acoustic waves. Each dot holds a single electron, and travels through a static potential landscape. When the dot passes abruptly between regions of different confinement, the electron is excited into a superposition of states, and oscillates unitarily from side to side. We detect these oscillations by using a weak, repeated measurement of the current across a tunnel barrier, and find close agreement with simulations.
AB - Observation of coherent single-electron dynamics is severely limited by experimental bandwidth. We present a method to overcome this using moving quantum dots defined by surface acoustic waves. Each dot holds a single electron, and travels through a static potential landscape. When the dot passes abruptly between regions of different confinement, the electron is excited into a superposition of states, and oscillates unitarily from side to side. We detect these oscillations by using a weak, repeated measurement of the current across a tunnel barrier, and find close agreement with simulations.
KW - surface acoustic waves
KW - quantum dots
KW - computation
KW - channel
KW - states
KW - spin
U2 - 10.1103/PhysRevLett.102.156801
DO - 10.1103/PhysRevLett.102.156801
M3 - Article
VL - 102
JO - Physical Review Letters
T2 - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 15
M1 - 156801
ER -