Proposal for detection of non-Markovian decay via current noise

Details Proposal for detection of non-Markovian decay via current noise Proposal for detection of non-Markovian decay via current noise

2007-01-23

arxiv.org/abs/cond-mat/0701541v6

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 4 figures, To appear in Phys. Rev. B (2008)

Scientific paper

10.1103/PhysRevB.77.035312

We propose to detect non-Markovian decay of an exciton qubit coupled to multi-mode bosonic reservoir via shot-noise measurements. Non-equilibrium current noise is calculated for a quantum dot embedded inside a \QTR{it}{p-i-n} junction. An additional term from non-Markovian effect is obtained in the derivation of noise spectrum. As examples, two practical photonic reservoirs, photon vacuum with the inclusion of cut-off frequency and surface plasmons, are given to show that the noise may become super-Poissonian due to this non-Markovian effect. Utilizing the property of super-radiance is further suggested to enhance the noise value.

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