Tuning the nuclei-induced spin relaxation of localized electrons by the quantum Zeno and anti-Zeno effects
arXiv:2212.07995 · doi:10.1103/PhysRevResearch.5.L032032
Abstract
Quantum measurement back action is fundamentally unavoidable when manipulating electron spins. Here we demonstrate that this back action can be efficiently exploited to tune the spin relaxation of localized electrons induced by the hyperfine interaction. In optical pump-probe experiments, powerful probe pulses suppress the spin relaxation of electrons on Si donors in an InGaAs epilayer due to the quantum Zeno effect. By contrast, an increase of the probe power leads to a speed up of the spin relaxation for electrons in InGaAs quantum dots due to the quantum anti-Zeno effect. The microscopic description shows that the transition between the two regimes occurs when the spin dephasing time is comparable to the probe pulse repetition period.
6+5 pages, 2+8 figures
References in corpus (18)
- Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics
- Quantum Zeno dynamics: mathematical and physical aspects
- Thermodynamical Control by Frequent Quantum Measurements
- Nuclear Spins in Nanostructures
- Prospects for measurement-based quantum computing with solid state spins
- Pump-Probe Faraday Rotation and Ellipticity in an Ensemble of Singly Charged Quantum Dots
- Zeno and anti-Zeno effects for quantum Brownian motion
- Spin dynamics in a strongly driven system: very slow Rabi oscillations
- Nuclear spin dynamics and Zeno effect in quantum dots and defect centers
- All-optical NMR in semiconductors provided by resonant cooling of nuclear spins interacting with electrons in the resonant spin amplification regime
- Spin noise in a quantum dot ensemble: from a quantum mechanical to a semi-classical description
- Suppression of nuclear spin fluctuations in an InGaAs quantum dot ensemble by GHz-pulsed optical excitation
- Quantum Zeno Manipulation of Quantum Dots
- Optical measurement of electron spins in quantum dots: Quantum Zeno effects
- Unveiling the electron-nuclear spin dynamics in an n-doped InGaAs epilayer by spin noise spectroscopy
- Spatial compression of a particle state in a parabolic potential by spin measurements
- Stabilisation of an optical transition energy via nuclear Zeno dynamics in quantum dot-cavity systems
- Resonant spin amplification in Faraday geometry