Multiple stable states of a periodically driven electron spin in a quantum dot using circularly polarized light

Physical Review B - Condensed Matter and Materials Physics

Volumn 83, Issue 23, 2011, Pages

  Korenev, V L ^a  

^a IOFFE INSTITUTE   (Russian Federation)

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EID: 79961233800     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.83.235429     Document Type: Article

References (31)

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22. x. In this case the term reverse Overhauser effect makes no sense. To underlie the different physics Ref. introduced the term, which I use here, the optical solid effect, i.e. the solid effect with the external alternating field being in the optical range.
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27. One should not confuse the narrowed distribution with the digitalizing of the Overhauser field. The term narrowed distribution means the decreased fluctuations about the average value, which can be the only stable state in ENSS. The term digitalized Overhauser field means a whole number of stable states with different mean Overhauser field values. In my case ideally the 840 stable digitalized states cover the frequency range 100 times larger than that of the disordered nuclear ensemble. In each of them the fluctuations are strongly suppressed (narrowed distribution) due to the feedback.
28. N can be considered as continuous variables.
29. R. In these conditions one can safely use the Eq. (2) for the mean nuclear spin.
30. R~5 as suggested in Refs. and. In contrast to it, the spin-polarized ensemble [scattered along the tilted straight line in Fig. ] will be distributed over the much larger number (>100) of modes [Fig.] after pulsed excitation.
31. Although sharing the opinion of Ref. the Ref. made a conclusion about the increased (decreased) stability of a few modes for Δ > 0 (Δ < 0), thus making an important step toward understanding the nuclear field-locking phenomenon. As I discussed here the actual number of modes in a single dot is much larger, see also V. L. Korenev e-print arXiv: 1006.5144 (2010).