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Aglaé Kellerer , Durham University

Towards quantum telescopes . Can Quantum Optics serve astronomy ? . Aglaé Kellerer , Durham University. Stimulated emission depletion microscopy (STED). Atoms are excited. Back into ground state through stimulated emission . Atoms emit spontaneously. λ/ D. λ/ D. << λ/ D. E 1. E 0.

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Aglaé Kellerer , Durham University

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  1. Towards quantum telescopes. • Can Quantum Optics serve astronomy? AglaéKellerer, Durham University

  2. Stimulated emission depletion microscopy (STED) Atoms are excited Back into ground state through stimulated emission Atoms emit spontaneously λ/D λ/D << λ/D E1 E0 The diffraction limit is routinely overcome in microscopy

  3. Origin of the diffraction limit ΔxΔpx > ħ telescope aperture detector The diffraction limit is rooted in the Heisenberg uncertainty principle

  4. Origin of the diffraction limit ΔxΔpx > ħ telescope aperture detector The diffraction limit is rooted in the Heisenberg uncertainty principle

  5. Origin of the diffraction limit ΔxΔpx > ħ telescope aperture detector The diffraction limit is rooted in the Heisenberg uncertainty principle

  6. Origin of the diffraction limit ΔxΔpx > ħ telescope aperture detector B A Distorted wavefront: knowledge of photon position is improved

  7. No-cloning theorem Coincidence detector Amplifier medium See: Milonni & Hardies, Phys. Lett. A 1982 Wootters & Zurek, Nature 1982 Mandel, Nature 1983

  8. No-cloning theorem Coincidence detector Together Amplifier medium Can photon cloning be used to beat the diffraction limit of a telescope? See: Milonni & Hardies, Phys. Lett. A 1982 Wootters & Zurek, Nature 1982 Mandel, Nature 1983

  9. No-cloning theorem Coincidence detector Together Amplifier medium Can photon cloning be used to beat the diffraction limit of a telescope? See: Milonni & Hardies, Phys. Lett. A 1982 Wootters & Zurek, Nature 1982 Mandel, Nature 1983 No! Huge noise contribution from spontaneous emissions

  10. Kellerer “Beating the diffraction limit in astronomy via quantum cloning” A&A 2014 Kellerer “Quantum telescopes” A&G in press Heralded photon cloning Together Quantum non-demolition measurement Detector read-out conditioned on trigger-signal The contribution from spontaneous emissions is minimized through use of a trigger signal

  11. Quantum non-demolition measurements Not applicable to astronomy: the photon is trapped inside the cavity

  12. Quantum non-demolition measurements Science 342, 1349 (2013); In this experiment the photon is not trapped inside the cavity

  13. Towards quantum telescopes: • Some questions for the discussion Other approaches to overcome the diffraction limit behind a telescope? What medium and cavity are required to amplify a single photon? Quantum non demolition measurements on single photons from an astronomical source?

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