Determination of the noise parameters in a one-dimensional open quantum system
arXiv:0811.0939 · doi:10.1016/j.physleta.2008.10.046
Abstract
We consider an electron magnetically interacting with a spin-1/2 impurity, embedded in an external environment whose noisy term acts only on the impurity's spin, and we find expressions for the electron transmission and reflection probabilities in terms of the phenomenological noise parameters. Moreover, we give a simple example of the necessity of complete positivity for physical consistency, showing that a positive but not completely positive dissipative map can lead to negative transmission probabilities.
References in corpus (13)
- Separability of Mixed States: Necessary and Sufficient Conditions
- Prescription for experimental determination of the dynamics of a quantum black box
- Complete Characterization of a Quantum Process: the Two-Bit Quantum Gate
- Ancilla-assisted quantum process tomography
- Realization of quantum process tomography in NMR
- Quantum Process Tomography of the Quantum Fourier Transform
- Open Quantum Dynamics: Complete Positivity and Entanglement
- Defect generation in a spin-1/2 transverse XY chain under repeated quenching of the transverse field
- Entanglement Controlled Single-Electron Transmittivity
- Realizing the quantum baker's map on an NMR quantum computer
- Towards Robust Quantum Computation
- Quantum dynamical entropy and decoherence rate
- Decoherence and linear entropy increase in the quantum baker's map