Nonequilibrium spin noise in a quantum dot ensemble

Smirnov, D. S.; Glasenapp, Ph.; Bergen, Manfred J. van; Glazov, M. M.; Reuter, D.; Wieck, A. D.; Bayer, М.; Greilich, A.

doi:10.1103/physrevb.95.241408

Cited by 20 publications

(17 citation statements)

References 22 publications

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“…3(b) reveals the slow time evolution of p x (b N,x ), p Mx (M x ) remains constant for the simulation times t < 10 000T * . In a real system, however, several different processes such as the dipole-dipole interaction between the nuclear spins [39], fluctuating quadrupolar splittings of nuclei [40], due to the recharging processes and the photoexcitation [8,41] contribute to the nuclear spin relaxation that occurs on a much larger time scale as considered up to now. In order to analyse this effect we employ the phenomenological approach where we (i) use the box model for simplicity, (ii) calculate the electron spin noise The longitudinal nuclear spin relaxation time T 1,N is much larger than any time scale related to the electron spin dynamics.…”

Section: Inclusion Of a Phenomenological Relaxation Of The Overhaumentioning

confidence: 99%

Electron spin noise under the conditions of nuclei-induced frequency focusing

2018

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We study theoretically the electron spin noise in quantum dots under non-equilibrium conditions caused by the pumping by a train of circularly polarized optical pulses. In such a situation, the nuclear spins are known to adjust in such a way, that the electron spin precession frequencies become multiples of the pump pulse repetition frequency. This so called phase synchronization effect was uncovered in [Science 317, 1896[Science 317, (2007] and termed nuclei-induced frequency focusing of electron spin coherence. Using the classical approach to the central spin model we evaluate the nuclear spin distribution function and the electron spin noise spectrum. We show that the electron spin noise spectrum consists of sharp peaks corresponding to the phase synchronization conditions and directly reveal the distribution of the nuclear spins. We discuss the effects of nuclear spin relaxation after the pumping is over and analyze the corresponding evolution of nuclear spin distributions and electron spin noise spectra.

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Section: Inclusion Of a Phenomenological Relaxation Of The Overhaumentioning

confidence: 99%

Electron spin noise under the conditions of nuclei-induced frequency focusing

2018

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“…The positively charged QD in the presence of probe light can be described by a four-level system. 20,21 The ground states are |±3/2 with the corresponding pro- jection of the heavy-hole spin on the growth axis. Absorption of a photon by the QD leads to the formation of singlet trion states |±1/2 , which are characterized by the spin of the electron in the trion.…”

Section: Modelmentioning

confidence: 99%

Hole-capture competition between a single quantum dot and an ionized acceptor

et al. 2018

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We study the competition of hole capture between an In(Ga)As quantum dot and a directly adjacent ionized impurity in view of spin-photon interfaces. The Kerr rotation noise spectroscopy at 4.2 K shows that the hole-capture probability of the In(Ga)As quantum dot is about one order of magnitude higher compared to the hole-capture probability of the ionized impurity and suggests that a simultaneous occupation of quantum dot and impurity by a hole is efficiently suppressed due to Coulomb interaction. A theoretical model of interconnected spin and charge noise allows the quantitative specification of all relevant time scales. arXiv:1808.05574v1 [cond-mat.mes-hall]

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“…Not only spin carrier Larmor precession in volume ( [9,15] etc.) and low-dimensional media (e. g. [16,17]) can be addressed by SNS, but also the nuclear dynamics [18][19][20], light-matter interaction effects [21,22], spatial properties distribution [23,24], and even noise of valley redistribution of electrons [25]. Still the atomic systems attract the significant attention of researchers [26][27][28][29][30][31][32][33] as model objects which allow to reveal the fundamental pecularities of spin noise formation mechanics.…”

Section: Introductionmentioning

confidence: 99%

Raman scattering model of the spin noise

Kozlov,

Fomin,

Petrov

et al. 2021

Preprint

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The mechanism of formation of the polarimetric signal observed in the spin noise spectroscopy (SNS) is analyzed from the viewpoint of the light scattering theory. A rigorous calculation of the polarimetric signal (Faraday rotation or ellipticity) recorded in the SNS is presented in the approximation of single scattering. We show that it is most correctly to consider this noise as a result of scattering of the probe light beam by fluctuating susceptibility of the medium. Fluctuations of the gyrotropic (antisymmetric) part of the susceptibility tensor lead to appearance of the typical for the SNS Faraday rotation noise at the Larmor frequency. At the same time, fluctuations of linear anisotropy of the medium (symmetric part of the susceptibility tensor) give rise to the ellipticity noise of the probe beam spectrally localized at the double Larmor frequency. The results of the theoretical analysis well agree with the experimental data on the ellipticity noise in cesium vapor.

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Nonequilibrium spin noise in a quantum dot ensemble

Cited by 20 publications

References 22 publications

Electron spin noise under the conditions of nuclei-induced frequency focusing

Electron spin noise under the conditions of nuclei-induced frequency focusing

Hole-capture competition between a single quantum dot and an ionized acceptor

Raman scattering model of the spin noise

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