Physics – Quantum Physics
Scientific paper
2009-02-13
New J.Phys.11:093005,2009
Physics
Quantum Physics
21 pages, 9 figures (some in colour) at low resolution for arXiv purposes
Scientific paper
10.1088/1367-2630/11/9/093005
Electromagnetically induced transparency (EIT) has been often proposed for generating nonlinear optical effects at the single photon level; in particular, as a means to effect a quantum non-demolition measurement of a single photon field. Previous treatments have usually considered homogeneously broadened samples, but realisations in any medium will have to contend with inhomogeneous broadening. Here we reappraise an earlier scheme [Munro \textit{et al.} Phys. Rev. A \textbf{71}, 033819 (2005)] with respect to inhomogeneities and show an alternative mode of operation that is preferred in an inhomogeneous environment. We further show the implications of these results on a potential implementation in diamond containing nitrogen-vacancy colour centres. Our modelling shows that single mode waveguide structures of length $200 \mu\mathrm{m}$ in single-crystal diamond containing a dilute ensemble of NV$^-$ of only 200 centres are sufficient for quantum non-demolition measurements using EIT-based weak nonlinear interactions.
Beausoleil Raymond G.
Greentree Andrew D.
Hollenberg Lloyd C. L.
Munro William J.
Nemoto Kae
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