Spin Lifetimes in Quantum Dots from Noise Measurements
arXiv:0804.0771 · doi:10.1103/PhysRevLett.102.016802
Abstract
We present a method of obtaining information about spin lifetimes in quantum dots from measurements of electrical transport. The dot is under resonant microwave irradiation and at temperatures comparable to or larger than the Zeeman energy. We find that the ratio of the spin coherence times T_{1}/T_{2} can be deduced from a measurement of current through the quantum dot as a function the applied magnetic field. We calculate the noise power spectrum of the dot current and show that a dip occurs at the Rabi frequency with a line width given by 1/T_{1}+1/T_{2}.
4 Pages, 4 figures
References in corpus (13)
- Quantum Computation with Quantum Dots
- Driven coherent oscillations of a single electron spin in a quantum dot
- Continuous weak measurement of quantum coherent oscillations
- Room-temperature manipulation and decoherence of a single spin in diamond
- Coherence of Spin Qubits in Silicon
- Shot Noise Spectrum of Open Dissipative Quantum Two-level Systems
- Single Spin Dynamics and Decoherence in a Quantum Dot via Charge Transport
- Passive Cooling of a Micromechanical Oscillator with a Resonant Electric Circuit
- Intrinsic noise properties of atomic point contact displacement detectors
- Pumped spin-current and shot noise spectra in a single quantum dot
- Noise Correlations in a Coulomb Blockaded Quantum Dot
- Statistics of charge transfer in a tunnel junction coupled to an oscillator
- Output spectrum of a measuring device at arbitrary voltage and temperature
Cited by in corpus (7)
- Noise Spectra of ac-driven quantum dots
- Enhanced current noise correlations in a Coulomb-Majorana device
- A Non-Demolition Single Spin Meter
- Single Spin Transport Spectroscopy - Current Blockade and Spin Decay
- Spin detection at elevated temperatures using a driven double quantum dot
- Mechanism of current noise spectrum in a nonequilibirum Kondo dot system
- Distinguishing Majorana bound states from Andreev bound states through differential conductance and current noise spectrum