Magnetic Traps and Guides for Bose-Einstein Condensates on an Atom Chip PDF Download

Author: Peter D. D. Schwindt
Publisher:
ISBN:
Category : Atomic beams
Languages : en
Pages : 284

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
In the presented work, we report about the successful creation of a Rubidium Bose-Einstein condensate. We use so called magnetic wire traps, which are especially simple, as they consist out of a wire and a homogeneous bias field. These wire traps are especially suited for Bose-Einstein condensation. Furthermore complex trapping potentials to manipulate a Bose-Einstein condensate can be realized. We combine 'large' and small scale wire traps. The 'large' scale is realized with a massive copper structure, while for the small wire traps we use the so called atom chip. This combination is promising, because it allowed us to develop a condensation process in the copper structure, which is independent of the structures on the atom chip, and thus the exchange of the 'physics' area. First experiments with the Bose-Einstein condensate are presented and discussed in detail.

Author: Jakob Reichel
Publisher: John Wiley & Sons
ISBN: 3527643923
Category : Science
Languages : en
Pages : 412

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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: Ran Salem
Publisher:
ISBN:
Category : Bose-Einstein condensation
Languages : en
Pages : 118

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Author: Thorsten Schumm
Publisher:
ISBN:
Category :
Languages : en
Pages : 189

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This thesis presents two realizations of magnetic double well potentials for Bose-Einstein condensates (BECs) on atom chips. One approach utilizes static magnetic traps, created by current carrying micro wires, manipulating the atoms close to the chip surface. As in all other atom chip experiments, cold atom clouds are found to break up to pieces in the vicinity of the trapping structure. A careful study of the underlying magnetic potential could attribute this fragmentation to current deviations, caused by corrugation of the wire edges. To avoid this effect, a new fabrication technique (electron beam lithography, gold evaporation) was employed to create 700nm cross section wires of significantly improved quality. A BEC was created and successfully transferred to the sub-micron structure, generating the double well. The general qualification of the device could be demonstrated by splitting cold thermal atomic clouds. However, numerous technical problems do yet prevent us from performing the experiment with BECs. The second approach pursued in this thesis combines static magnetic traps with oscillating (RF) magnetic fields and realizes a double well in the emerging adiabatic dressed potential. This scheme can be realized far from the chip surface, fragmentation does not occur and Bose-Einstein condensates could be split successfully. We realize a matter wave interferometer by recombining the two clouds in free expansion. The arising interference patterns reveal a narrow distribution of the relative phase, indicating a coherent splitting process. We monitor the phase evolution throughout and after the splitting and control it by deliberately unbalancing the double well.

Author: Klaus D. Sattler
Publisher: CRC Press
ISBN: 1466505109
Category : Science
Languages : en
Pages : 754

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Ushering in the next technological era, this state-of-the-art book focuses on the instrumentation and experiments emerging at the picometer scale. International scientists and researchers at the forefront of the field address the key challenges in developing new instrumentation and techniques to visualize and measure structures at this sub-nanometer level. The book helps you understand how picoscience is an extension of nanoscience, determine which experimental technique to use in your research, and connect basic studies to the development of next-generation picoelectronic devices.

Author: Shannon Whitlock
Publisher:
ISBN:
Category : Bose-Einstein condensation
Languages : en
Pages : 120

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Author: Kai Dieckmann
Publisher:
ISBN: 9789090145471
Category :
Languages : en
Pages : 122

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Author: Manuel Vogel
Publisher: Springer Nature
ISBN: 3031554205
Category :
Languages : en
Pages : 467

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Author: Thomas Beth
Publisher: John Wiley & Sons
ISBN: 3527606084
Category : Science
Languages : en
Pages : 471

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Book Description
Quantum processing and communication is emerging as a challenging technique at the beginning of the new millennium. This is an up-to-date insight into the current research of quantum superposition, entanglement, and the quantum measurement process - the key ingredients of quantum information processing. The authors further address quantum protocols and algorithms. Complementary to similar programmes in other countries and at the European level, the German Research Foundation (DFG) realized a focused research program on quantum information. The contributions - written by leading experts - bring together the latest results in quantum information as well as addressing all the relevant questions.