Download presentation

Presentation is loading. Please wait.

Published byZavier Robbin Modified over 3 years ago

1
**Towards quantum telescopes. Can Quantum Optics serve astronomy?**

MUSE Aglaé Kellerer, 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
**Distorted wavefront: knowledge of photon position is improved**

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

8
**No-cloning theorem Coincidence detector Amplifier medium**

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

10
**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

11
**Heralded photon cloning**

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

12
**Quantum non-demolition measurements**

Not applicable to astronomy: the photon is trapped inside the cavity

13
**Science 342, 1349 (2013); Quantum non-demolition measurements**

In this experiment the photon is not trapped inside the cavity

14
**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?

Similar presentations

Presentation is loading. Please wait....

OK

Femtosecond lasers István Robel

Femtosecond lasers István Robel

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Maths ppt on real numbers class 10 Ppt on 3d geometry maths class 11 Ppt on 5 star chocolate cake Ppt on polynomials and coordinate geometry proofs Ppt on chromosomes and chromatin difference Ppt on resistance temperature detector manufacturers Ppt on prepositions for grade 6 Ppt on natural numbers Ppt on protein energy malnutrition with its management Ppt on touch screen technology download