Spin Squeezing And Non Linear Atom Interferometry With Bose Einstein Condensates
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| Author | : Christian Groß |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 123 |
| Release | : 2012-01-13 |
| Genre | : Science |
| ISBN | : 3642256368 |
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.
| Author | : Christian Groß |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 123 |
| Release | : 2012-01-12 |
| Genre | : Science |
| ISBN | : 3642256376 |
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.
| Author | : Tarik Berrada |
| Publisher | : Springer |
| Total Pages | : 244 |
| Release | : 2015-12-17 |
| Genre | : Science |
| ISBN | : 3319272330 |
This thesis demonstrates a full Mach–Zehnder interferometer with interacting Bose–Einstein condensates confined on an atom chip. It relies on the coherent manipulation of atoms trapped in a magnetic double-well potential, for which the author developed a novel type of beam splitter. Particle-wave duality enables the construction of interferometers for matter waves, which complement optical interferometers in precision measurement devices, both for technological applications and fundamental tests. This requires the development of atom-optics analogues to beam splitters, phase shifters and recombiners. Particle interactions in the Bose–Einstein condensate lead to a nonlinearity, absent in photon optics. This is exploited to generate a non-classical state with reduced atom-number fluctuations inside the interferometer. This state is then used to study the interaction-induced dephasing of the quantum superposition. The resulting coherence times are found to be a factor of three longer than expected for coherent states, highlighting the potential of entanglement as a resource for quantum-enhanced metrology.
| Author | : G.M. Tino |
| Publisher | : IOS Press |
| Total Pages | : 807 |
| Release | : 2014-10-16 |
| Genre | : Science |
| ISBN | : 161499448X |
Since atom interferometers were first realized about 20 years ago, atom interferometry has had many applications in basic and applied science, and has been used to measure gravity acceleration, rotations and fundamental physical quantities with unprecedented precision. Future applications range from tests of general relativity to the development of next-generation inertial navigation systems. This book presents the lectures and notes from the Enrico Fermi school "Atom Interferometry", held in Varenna, Italy, in July 2013. The aim of the school was to cover basic experimental and theoretical aspects and to provide an updated review of current activities in the field as well as main achievements, open issues and future prospects. Topics covered include theoretical background and experimental schemes for atom interferometry; ultracold atoms and atom optics; comparison of atom, light, electron and neutron interferometers and their applications; high precision measurements with atom interferometry and their application to tests of fundamental physics, gravitation, inertial measurements and geophysics; measurement of fundamental constants; interferometry with quantum degenerate gases; matter wave interferometry beyond classical limits; large area interferometers; atom interferometry on chips; and interferometry with molecules. The book will be a valuable source of reference for students, newcomers and experts in the field of atom interferometry.
| Author | : Nick Proukakis |
| Publisher | : World Scientific |
| Total Pages | : 579 |
| Release | : 2013 |
| Genre | : Science |
| ISBN | : 1848168128 |
This volume provides a broad overview of the principal theoretical techniques applied to non-equilibrium and finite temperature quantum gases. Covering Bose-Einstein condensates, degenerate Fermi gases, and the more recently realised exciton-polariton condensates, it fills a gap by linking between different methods with origins in condensed matter physics, quantum field theory, quantum optics, atomic physics, and statistical mechanics.
| Author | : John Michels (Journalist) |
| Publisher | : |
| Total Pages | : 1744 |
| Release | : 2011 |
| Genre | : Science |
| ISBN | : |
| Author | : Christopher Pethick |
| Publisher | : |
| Total Pages | : 584 |
| Release | : 2014-05-14 |
| Genre | : SCIENCE |
| ISBN | : 9781139811781 |
Introduction to ultracold atomic Bose and Fermi gases for advanced undergraduates, graduates, experimentalists and theorists.
| Author | : |
| Publisher | : |
| Total Pages | : 2018 |
| Release | : 2002 |
| Genre | : Chemistry |
| ISBN | : |
| Author | : Jakob Reichel |
| Publisher | : John Wiley & Sons |
| Total Pages | : 412 |
| Release | : 2011-08-24 |
| Genre | : Science |
| ISBN | : 3527643923 |
This stimulating discussion of a rapidly developing field is divided into two parts. The first features tutorials in textbook style providing self-contained introductions to the various areas relevant to atom chip research. Part II contains research reviews that provide an integrated account of the current state in an active area of research where atom chips are employed, and explore possible routes of future progress. Depending on the subject, the length of the review and the relative weight of the 'review' and 'outlook' parts vary, since the authors include their own personal view and style in their accounts.
| Author | : Matteo Fadel |
| Publisher | : Springer Nature |
| Total Pages | : 191 |
| Release | : 2021-10-04 |
| Genre | : Science |
| ISBN | : 3030854728 |
This book presents theoretical methods and experimental results on the study of multipartite quantum correlations in spin-squeezed Bose–Einstein condensates. Nonclassical correlations in many-body systems are particularly interesting for both fundamental research and practical applications. For their investigation, ultracold atomic ensembles offer an ideal platform, due to their high controllability and long coherence times. In particular, we introduce criteria for detecting and characterizing multipartite entanglement, Einstein–Podolsky–Rosen steering, and Bell correlations. Moreover, we present the experimental observation of such correlations in systems of about 600 atoms.
