Polarization freezing of 10000 optically-cooled nuclear spins by coupling to a single electron

Abstract

The nature of the nano-scale environment presents a major challenge for solid-state implementation of spin-based qubits. In this work, a single electron spin in an optically pumped nanometer-sized III-V semiconductor quantum dot is used to control a macroscopic nuclear spin of several thousand nuclei, freezing its decay and leading to spin life-times exceeding 100 seconds at low temperatures. Few-millisecond-fast optical initialization of the nuclear spin is followed by a slow decay exhibiting random telegraph signals at long delay times, arising from low probability electron jumps out of the dot. The remarkably long spin life-time in a dot surrounded by a densely-packed nuclear spin environment arises from the Knight field created by the resident electron, which leads to suppression of nuclear spin depolarization.

13 pages, 3 figures, submitted to Nature Materials

References in corpus (20)

• Driven coherent oscillations of a single electron spin in a quantum dot
• Suppressing Spin Qubit Dephasing by Nuclear State Preparation
• Knight Field Enabled Nuclear Spin Polarization in Single Quantum Dots
• Hole spin dephasing time associated to hyperfine interaction in quantum dots
• Nuclear Spin Switch in Semiconductor Quantum Dots
• Dynamics of Quantum Dot Nuclear Spin Polarization Controlled by a Single Electron
• Dynamic Nuclear Polarization in Silicon Microparticles
• Bistability of the Nuclear Polarisation created through optical pumping in InGaAs Quantum Dots
• Nonlinear dynamics of quantum dot nuclear spins
• Demagnetization of Quantum Dot Nuclear Spins: Breakdown of the Nuclear Spin Temperature Approach
• Stabilizing effect of nuclear quadrupole interaction on the polarization of electron-nuclear spin system in a quantum dot
• Pumping of nuclear spins by the optical solid effect in a quantum dot
• Efficient Dynamic Nuclear Polarization at High Magnetic Fields
• Efficient dynamical nuclear polarization in quantum dots: Temperature dependence
• Light-induced nuclear quadrupolar relaxation in semiconductors
• Overhauser effect in individual InP/GaInP dots
• Suppression of nuclear spin diffusion at a GaAs/AlGaAs interface measured with a single quantum dot nano-probe
• Long nuclear spin decay times controlled by optical pumping in individual quantum dots
• Bistability of optically-induced nuclear spin orientation in quantum dots
• Voltage controlled nuclear polarization switching in a single InGaAs quantum dot

Cited by in corpus (22)

• Nuclear spin physics in quantum dots: an optical investigation
• Direct measurement of the hole-nuclear spin interaction in single quantum dots
• Quadrupolar spectra of nuclear spins in strained InGaAs quantum dots
• Hyperfine interaction dominated dynamics of nuclear spins in self-assembled quantum dots
• Full coherent control of nuclear spins in an optically pumped single quantum dot
• Charge control in InP/GaInP single quantum dots embedded in Schottky diodes
• Electron and nuclear spin properties of the nanohole-filled GaAs/AlGaAs quantum dots
• Electron-nuclei spin dynamics in II-VI semiconductor quantum dots
• Dynamic nuclear polarization in InGaAs/GaAs and GaAs/AlGaAs quantum dots under non-resonant ultra-low power optical excitation
• Optically tunable nuclear magnetic resonance in a single quantum dot
• Few-second-long correlation times in a quantum dot nuclear spin bath probed by frequency-comb NMR spectroscopy
• Nuclear spin diffusion in the central spin system of a GaAs/AlGaAs quantum dot
• Alignment of nuclear spins in single quantum dots using unpolarized light
• Direct measurement of hyperfine shifts and radiofrequency manipulation of the nuclear spins in individual CdTe/ZnTe quantum dots
• Nuclear spin polarization in a single quantum dot pumped by two laser beams
• Driven dynamics of a quantum dot electron spin coupled to bath of higher-spin nuclei
• Spin dynamics of quadrupole nuclei in InGaAs quantum dots
• Spin beats in the photoluminescence polarization dynamics of charged excitons in InP/(In,Ga)P quantum dots in presence of nuclear quadrupole interaction
• P-shell carriers assisted dynamic nuclear spin polarization in single quantum dots at zero external magnetic field
• MOVPE growth, transmission electron microscopy and magneto-optical spectroscopy of individual InAsP/GaInP quantum dots
• Probing electron spin dynamics in single telecom InAs(P)/InP quantum dots using the Hanle effect
• Quantifying electron-nuclear spin entanglement dynamics in central-spin systems using one-tangles