Quantum Zeno effect under continuous spin noise measurement in a quantum dot-micropillar cavity
arXiv:2008.06442 · doi:10.1103/PhysRevB.103.045413
Abstract
We theoretically describe the quantum Zeno effect in a spin-photon interface represented by a charged quantum dot in a micropillar cavity. The electron spin in this system entangles with the polarization of the transmitted photons, and their continuous detection leads to the slowing of the electron spin precession in external magnetic field and induces the spin relaxation. We obtain a microscopic expression for the spin measurement rate and calculate the second and fourth order correlation functions of the spin noise, which evidence the change of the spin statistics due to the quantum Zeno effect. We demonstrate, that the quantum limit for the spin measurement can be reached for any probe frequency using the homodyne nondemolition spin measurement, which maximizes the rate of the quantum information gain.
arXiv comment14 pages, 9 figures
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- Hidden anisotropy controls spin-photon entanglement in a charged quantum dot
- Birefringent spin-photon interface generates polarization entanglement
- Polaron formation in a spin chain by measurement-induced imaginary Zeeman field