By Andreas Reiserer
This thesis stories on significant steps in the direction of the belief of scalable quantum networks. It addresses the experimental implementation of a deterministic interplay mechanism among flying optical photons and a unmarried trapped atom. particularly, it demonstrates the nondestructive detection of an optical photon. To this finish, unmarried rubidium atoms are trapped in a three-d optical lattice on the heart of an optical hollow space within the powerful coupling regime. complete keep watch over over the atomic country — its place, its movement, and its digital nation — is accomplished with laser beams utilized alongside the resonator and from the facet. whilst faint laser pulses are mirrored from the resonator, the mixed atom-photon kingdom acquires a state-dependent part shift. In a primary sequence of experiments, this can be hired to nondestructively discover optical photons via measuring the atomic kingdom after the mirrored image procedure. Then, quantum bits are encoded within the polarization of the laser pulse and within the Zeeman kingdom of the atom. The state-dependent part shift mediates a deterministic common quantum gate among the atom and one or successively mirrored photons, that is used to generate entangled atom-photon, atom-photon-photon, and photon-photon states out of separable enter states.
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Additional resources for A Controlled Phase Gate Between a Single Atom and an Optical Photon
Rev. Lett. 105(17), 173003 (2010). 173003. org/doi/10. 173003 22. J. , State-insensitive cooling and trapping of single atoms in an optical cavity. Phys. Rev. Lett. 90(13), 133602 (2003). 133602. 133602 23. P. , Cavity-induced atom cooling in the strong coupling regime. Phys. Rev. Lett. 79(25), 4974–4977 (1997). 4974. 4974 24. V. Vuletic, S. Chu, Laser cooling of atoms, ions, or molecules by coherent scattering. Phys. Rev. Lett. 84(17), 3787–3790 (2000). 3787. http://link. 3787 References 27 25.
Cavity-induced atom cooling in the strong coupling regime. Phys. Rev. Lett. 79(25), 4974–4977 (1997). 4974. 4974 24. V. Vuletic, S. Chu, Laser cooling of atoms, ions, or molecules by coherent scattering. Phys. Rev. Lett. 84(17), 3787–3790 (2000). 3787. http://link. 3787 References 27 25. P. , Cavity cooling of a single atom. Nature 428(6978), 50–52 (2004). ISSN: 0028-0836. 1038/nature02387. 1038/nature02387 26. A. , Observation of the vacuum rabi spectrum for one trapped atom. Phys. Rev. Lett.
The remaining broadening is due to atom trapping at different positions within the red-detuned dipole trap, which are not resolved in the camera images. The error bars denote the standard error of the mean The observed spectrum has a Lorentzian linewidth of 8 MHz (FWHM) (red fit curve), which is slightly broader than the natural linewidth of the atomic transition (6 MHz). The remaining deviation is caused by different atom-trapping positions in the lattice, which are not resolved in the camera images, but can still lead to a slightly different intensity of the 1064 nm light.
A Controlled Phase Gate Between a Single Atom and an Optical Photon by Andreas Reiserer