Relative Number Squeezing In A Spin 1 Bose Einstein Condensate PDF Download
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Author | : Eva M. Bookjans |
Publisher | : |
Total Pages | : |
Release | : 2010 |
Genre | : Bose-Einstein condensation |
ISBN | : |
Download Relative Number Squeezing in a Spin-1 Bose-Einstein Condensate Book in PDF, ePub and Kindle
The quantum properties of matter waves, in particular quantum correlations and entanglement are an important frontier in atom optics with applications in quantum metrology and quantum information. In this thesis, we report the first observation of sub-Poissonian fluctuations in the magnetization of a spinor 87Rb condensate. The fluctuations in the magnetization are reduced up to 10 dB below the classical shot noise limit. This relative number squeezing is indicative of the predicted pair-correlations in a spinor condensate and lay the foundation for future experiments involving spin-squeezing and entanglement measurements. We have investigated the limits of the imaging techniques used in our lab, absorption and fluorescence imaging, and have developed the capability to measure atoms numbers with an uncertainly
Author | : Christian Groß |
Publisher | : Springer Science & Business Media |
Total Pages | : 123 |
Release | : 2012-01-13 |
Genre | : Science |
ISBN | : 3642256368 |
Download Spin Squeezing and Non-linear Atom Interferometry with Bose-Einstein Condensates Book in PDF, ePub and Kindle
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 | : |
Total Pages | : 0 |
Release | : 2010 |
Genre | : |
ISBN | : |
Download Spin Squeezing and Non-linear Atom Interferometry with Bose-Einstein Condensates Book in PDF, ePub and Kindle
Author | : Tarik Berrada |
Publisher | : Springer |
Total Pages | : 244 |
Release | : 2015-12-17 |
Genre | : Science |
ISBN | : 3319272330 |
Download Interferometry with Interacting Bose-Einstein Condensates in a Double-Well Potential Book in PDF, ePub and Kindle
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 | : Ken'ichi Nakagawa |
Publisher | : World Scientific |
Total Pages | : 324 |
Release | : 2010-02-10 |
Genre | : Science |
ISBN | : 9814467006 |
Download Laser Spectroscopy - Proceedings Of The Xix International Conference Book in PDF, ePub and Kindle
The XIX International Conference on Laser Spectroscopy, one of the leading conferences in the very diverse and still growing field of laser spectroscopy, was held in Hokkaido, Japan, on June 7-12, 2009. This volume, comprising a collection of invited contributions presented at the conference, will report on the latest developments in the area of laser spectroscopy and related fields: cold atoms and molecules, degenerate quantum gases, quantum optics, quantum information processing, precision measurements, atomic clock, ultra-fast lasers and strong field phenomena, and novel spectroscopic applications.
Author | : Keith Burnett (Ed); Mark Edwar |
Publisher | : DIANE Publishing |
Total Pages | : 213 |
Release | : 1996-12 |
Genre | : |
ISBN | : 0788137409 |
Download Bose-Einstein Condensation Book in PDF, ePub and Kindle
Among the most remarkable effects that quantum mechanics adds to the catalog of the thermal properties of matter is "condensation" of an ideal gas of identical particles into a single quantum state, the principle of which was discovered in the theory of statistical mechanics by Bose and Einstein in the 1920s. Bose-Einstein condensation (BEC) is a mechanism for producing a macroscopic quantum system, and is exemplary of the macroscopic quantum phenomena of superconductivity and superfluidity.These 15 papers provide an introduction to current work on BEC.
Author | : G.M. Tino |
Publisher | : IOS Press |
Total Pages | : 807 |
Release | : 2014-10-16 |
Genre | : Science |
ISBN | : 161499448X |
Download Atom Interferometry Book in PDF, ePub and Kindle
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 | : Christopher Pethick |
Publisher | : |
Total Pages | : 584 |
Release | : 2014-05-14 |
Genre | : SCIENCE |
ISBN | : 9781139811781 |
Download Bose-Einstein Condensation in Dilute Gases Book in PDF, ePub and Kindle
Introduction to ultracold atomic Bose and Fermi gases for advanced undergraduates, graduates, experimentalists and theorists.
Author | : Nick Proukakis |
Publisher | : World Scientific |
Total Pages | : 579 |
Release | : 2013 |
Genre | : Science |
ISBN | : 1848168128 |
Download Quantum Gases Book in PDF, ePub and Kindle
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 | : Marine Pigneur |
Publisher | : Springer Nature |
Total Pages | : 204 |
Release | : 2020-08-28 |
Genre | : Science |
ISBN | : 3030528448 |
Download Non-equilibrium Dynamics of Tunnel-Coupled Superfluids Book in PDF, ePub and Kindle
The relaxation of isolated quantum many-body systems is a major unsolved problem of modern physics, which is connected to many fundamental questions. However, realizations of quantum many-body systems which are both well isolated from their environment and accessible to experimental study are scarce. In recent years, the field has experienced rapid progress, partly attributed to ultra-cold atoms. This book presents the experimental study of a relaxation phenomenon occurring in a one-dimensional bosonic Josephson junction. The system consists of two 1D quasi Bose-Einstein condensates of 87Rb, magnetically trapped on an atom chip. Using radio-frequency dressing, the author deforms a single harmonic trap, in which the atoms are initially condensed, into a double-well potential and realizes a splitting of the wave function. A large spatial separation and a tilt of the double-well enable the preparation of a broad variety of initial states by precisely adjusting the initial population and relative phase of the two wave packets, while preserving the phase coherence. By re-coupling the two wave packets, the author investigates tunneling regimes such as Josephson (plasma) oscillations and macroscopic quantum self-trapping. In both regimes, the tunneling dynamics exhibits a relaxation to a phase-locked equilibrium state contradicting theoretical predictions. The experimental results are supported with an empirical model that allows quantitative discussions according to various experimental parameters. These results illustrate how strongly the non-equilibrium dynamics differ from the equilibrium one, which is well described by thermodynamics and statistical physics.