Pumped spin-current and shot noise spectra in a single quantum dot
arXiv:cond-mat/0404064 · doi:10.1103/PhysRevLett.94.066601
Abstract
We exploit the pumped spin-current and current noise spectra under equilibrium condition in a single quantum dot connected to two normal leads, as an electrical scheme for detection of the electron spin resonance (ESR) and decoherence. We propose spin-resolved quantum rate equations with correlation functions in Laplace-space for the analytical derivation of the zero-frequency atuo- and cross-shot noise spectra of charge- and spin-current. Our results show that in the strong Coulomb blockade regime, ESR-induced spin flip generates a finite spin-current and the quantum partition noises in the absence of net charge transport. Moreover, spin shot noise is closely related to the magnetic Rabi frequency and decoherence and would be a sensitive tool to measure them.
4 pages, 3 figures, to be published in Phys. Rev. Letter
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- Towards Noise Simulation in Interacting Nonequilibrium Systems Strongly Coupled to Baths
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- Bistable Spin Currents from Quantum Dots Embedded in a Microcavity
- Spin Lifetimes in Quantum Dots from Noise Measurements
- Spin-polarized quantum transport through a T-shape quantum dot-array: a model of spin splitter
- Positive current noise cross-correlations in capacitively coupled double quantum dots with ferromagnetic leads
- Spin-dependent current noises in transport through coupled quantum dots
- Shot noise in a quantum dot coupled to non-magnetic leads: Effects of Coulomb interaction
- Conditional spin counting statistics as a probe of Coulomb interaction and spin-resolved bunching
- Can dephasing generate non-local spin correlations?
- Quantum bistability and spin current shot noise of a single quantum dot coupled to an optical microcavity
- Pumping Current in a Quantum Dot by an Oscillating Magnetic Field
- Controlling inelastic cotunneling through an interacting quantum dot by a circularly-polarized field