Abstract
We investigate quantum dynamics in the electron-nuclei coupled spin system in quantum dots and clarify the fundamental features of quantum correlation induced via successive electron-spin measurements. This quantum correlation leads to interesting phenomena such as the bunching of outcomes in the electron-spin measurements and the revival of an arbitrary initial electron-spin state. The nuclear spin system is also affected by the quantum correlation and is, in fact, squeezed via conditional measurements or postselection. This squeezing is confirmed by calculating the increase in the purity of the nuclear spin system. Thus, the successive electron-spin measurements provide a probabilistic method to squeeze the nuclear spin system. These new features are predicted not only for the case of double quantum dots occupied by a pair of electrons but also for the case of a single quantum dot occupied by a single electron or a pair of electrons.
| Original language | English |
|---|---|
| Article number | 115304 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 77 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2008 Mar 4 |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Quantum dynamics in electron-nuclei coupled spin system in quantum dots : Bunching, revival, and quantum correlation in electron-spin measurements. / Çakir, Özgür; Takagahara, Toshihide.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 77, No. 11, 115304, 04.03.2008.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Quantum dynamics in electron-nuclei coupled spin system in quantum dots
T2 - Bunching, revival, and quantum correlation in electron-spin measurements
AU - Çakir, Özgür
AU - Takagahara, Toshihide
PY - 2008/3/4
Y1 - 2008/3/4
N2 - We investigate quantum dynamics in the electron-nuclei coupled spin system in quantum dots and clarify the fundamental features of quantum correlation induced via successive electron-spin measurements. This quantum correlation leads to interesting phenomena such as the bunching of outcomes in the electron-spin measurements and the revival of an arbitrary initial electron-spin state. The nuclear spin system is also affected by the quantum correlation and is, in fact, squeezed via conditional measurements or postselection. This squeezing is confirmed by calculating the increase in the purity of the nuclear spin system. Thus, the successive electron-spin measurements provide a probabilistic method to squeeze the nuclear spin system. These new features are predicted not only for the case of double quantum dots occupied by a pair of electrons but also for the case of a single quantum dot occupied by a single electron or a pair of electrons.
AB - We investigate quantum dynamics in the electron-nuclei coupled spin system in quantum dots and clarify the fundamental features of quantum correlation induced via successive electron-spin measurements. This quantum correlation leads to interesting phenomena such as the bunching of outcomes in the electron-spin measurements and the revival of an arbitrary initial electron-spin state. The nuclear spin system is also affected by the quantum correlation and is, in fact, squeezed via conditional measurements or postselection. This squeezing is confirmed by calculating the increase in the purity of the nuclear spin system. Thus, the successive electron-spin measurements provide a probabilistic method to squeeze the nuclear spin system. These new features are predicted not only for the case of double quantum dots occupied by a pair of electrons but also for the case of a single quantum dot occupied by a single electron or a pair of electrons.
UR - http://www.scopus.com/inward/record.url?scp=41449092790&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=41449092790&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.77.115304
DO - 10.1103/PhysRevB.77.115304
M3 - Article
AN - SCOPUS:41449092790
VL - 77
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 11
M1 - 115304
ER -