Spin Squeezing and Non-linear Atom Interferometry with Bose-Einstein Condensates

Nonfiction, Science & Nature, Science, Other Sciences, Weights & Measures, Physics, Quantum Theory
Cover of the book Spin Squeezing and Non-linear Atom Interferometry with Bose-Einstein Condensates by Christian Groß, Springer Berlin Heidelberg
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Author: Christian Groß ISBN: 9783642256370
Publisher: Springer Berlin Heidelberg Publication: January 12, 2012
Imprint: Springer Language: English
Author: Christian Groß
ISBN: 9783642256370
Publisher: Springer Berlin Heidelberg
Publication: January 12, 2012
Imprint: Springer
Language: English

Interferometry, the most precise measurement technique known today, exploits the wave-like nature of the atoms or photons in the interferometer. As expected from the laws of quantum mechanics, the granular, particle-like features of the individually independent atoms or photons are responsible for the precision limit, the shot noise limit. However this “classical” bound is not fundamental and it is the aim of quantum metrology to overcome it by employing entanglement among the particles. This work reports on the realization of spin-squeezed states suitable for atom interferometry. Spin squeezing was generated on the basis of motional and spin degrees of freedom, whereby the latter allowed the implementation of a full interferometer with quantum-enhanced precision.

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Interferometry, the most precise measurement technique known today, exploits the wave-like nature of the atoms or photons in the interferometer. As expected from the laws of quantum mechanics, the granular, particle-like features of the individually independent atoms or photons are responsible for the precision limit, the shot noise limit. However this “classical” bound is not fundamental and it is the aim of quantum metrology to overcome it by employing entanglement among the particles. This work reports on the realization of spin-squeezed states suitable for atom interferometry. Spin squeezing was generated on the basis of motional and spin degrees of freedom, whereby the latter allowed the implementation of a full interferometer with quantum-enhanced precision.

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