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Weak values of electron spin in a double quantum dot. / Romito, Alessandro; Gefen, Yuval; Blanter, Yaroslav M.
In: Physical review letters, Vol. 100, No. 5, 056801, 05.02.2008.Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Weak values of electron spin in a double quantum dot
AU - Romito, Alessandro
AU - Gefen, Yuval
AU - Blanter, Yaroslav M.
PY - 2008/2/5
Y1 - 2008/2/5
N2 - We propose a protocol for a controlled experiment to measure a weak value of the electron's spin in a solid state device. The weak value is obtained by a two step procedure-weak measurement followed by a strong one (postselection), where the outcome of the first measurement is kept provided a second postselected outcome occurs. The setup consists of a double quantum dot and a weakly coupled quantum point contact to be used as a detector. Anomalously large values of the spin of a two electron system are predicted, as well as negative values of the total spin. We also show how to incorporate the adverse effect of decoherence into this procedure.
AB - We propose a protocol for a controlled experiment to measure a weak value of the electron's spin in a solid state device. The weak value is obtained by a two step procedure-weak measurement followed by a strong one (postselection), where the outcome of the first measurement is kept provided a second postselected outcome occurs. The setup consists of a double quantum dot and a weakly coupled quantum point contact to be used as a detector. Anomalously large values of the spin of a two electron system are predicted, as well as negative values of the total spin. We also show how to incorporate the adverse effect of decoherence into this procedure.
U2 - 10.1103/PhysRevLett.100.056801
DO - 10.1103/PhysRevLett.100.056801
M3 - Journal article
AN - SCOPUS:38949088707
VL - 100
JO - Physical review letters
JF - Physical review letters
SN - 1079-7114
IS - 5
M1 - 056801
ER -