Spin Squeezing and Non-linear Atom Interferometry with Bose-Einstein Condensates [electronic resource] /
Groß, Christian.author.
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.
Description based upon print version of record.
"Doctoral thesis accepted by the University of Heidelberg, Germany."
Includes bibliographical references.
Introduction -- Spin Squeezing, Entanglement and Quantum Metrology -- Squeezing Two Mean Field Modes of a Bose-Einstein Condensate -- Non-linear Interferometry Beyond the Standard Quantum Limit -- Outlook. - Appendices.
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.
Phase transformations (Statistical physics).
Condensed materials.
Physical measurements.
Measurement   .
Quantum Gases and Condensates.
Measurement Science and Instrumentation.