Article:
AIP Conference Proceedings 02/2010; 1211:1631-1638
DOI: 10.1063/1.3362264
Publisher: AIP
All types of heavy forgings that are used in energy machine industry, rotor shafts as well as discs, retaining rings or tie bolts are subject to extensive nondestructive inspections before they are de...
Johannes Vrana, Alexander Zimmer, Kevin Bailey, Ravi Angal, Paul Zombo, Axel Buschmann, Robert E. Shannon, Hans-Peter Lohmann, Werner Heinrich
Article:
AIP Conference Proceedings 02/2010; 1211:1623-1630
DOI: 10.1063/1.3362263
Publisher: AIP
Heavy rotor forgings for land-based power generation turbines and generators are inspected ultrasonically. Several decades ago the first inspections were conducted using manual, straight beam, contact...
Book:
09/2009
DOI: 10.13140/RG.2.1.1680.4567
Publisher: Shaker, ISBN: 978-3832284978
Active thermography with electromagnetic excitation allows one to detect defects in components non-destructively, reliably and fast by imaging with an infrared camera. In induction thermography a curr...
Hubert Mooshofer, Matthias Goldammer, Wolfgang Heine, Max Rothenfusser, Jason Bass, Erik Lombardo, Johannes Vrana
Conference Paper:
DGZfP Jahrestagung 05/2009, At Münster, Germany; 2009
DOI: 10.13140/2.1.3357.5365
In power engineering, components subjected to high stress are used in various applications, and it is essential to prevent defects in these components. In addition to turbine construction, this is als...
Article:
AIP Conference Proceedings 03/2009; 1096:518
DOI: 10.1063/1.3114299
Publisher: AIP
Active thermography, using electromagnetic excitation, allows detecting defects like cracks which distort the flow of current in the component under examination. Like other thermography techniques it ...
Article:
AIP Conference Proceedings 02/2008; 975:475-482
DOI: 10.1063/1.2902698
Publisher: AIP
Induction thermography is a non-contacting, non-destructive evaluation method with a wide range of applications. A deeper understanding of the detectability of cracks requires fundamental knowledge ab...
Jürgen Volz, Markus Weber, Daniel Schlenk, Wenjamin Rosenfeld, Johannes Vrana, Karen Saucke, Christian Kurtsiefer, Harald Weinfurter
Article:
Physical review letters 02/2006; 96(3):030404
DOI: 10.1103/PhysRevLett.96.030404
Publisher: American Physical Society (APS)
We report the observation of entanglement between a single trapped atom and a single photon at a wavelength suitable for low-loss communication over large distances, thereby achieving a crucial step t...
Jürgen Volz, Markus Weber, Daniel Schlenk, Wenjamin Rosenfeld, Johannes Vrana, Karen Saucke, Christian Kurtsiefer, Harald Weinfurter
Article:
arXiv:quant-ph 11/2005; 0511183
DOI: 10.48550/arXiv.quant-ph/0511183
We report the observation of entanglement between a single trapped atom and a single photon at a wavelength suitable for low-loss communication over large distances, thereby achieving a crucial step t...
Jürgen Volz, Markus Weber, Wenjamin Rosenfeld, Daniel Schlenk, Johannes Vrana, Karen Saucke, Christian Kurtsiefer, Harald Weinfurter
Conference Paper:
Quantum Electronics Conference 06/2005, At Tokyo, Japan; 2005:313
DOI: 10.1109/EQEC.2005.1567479
Publisher: IEEE
A single 87Rb atom into an optical dipole trap is loaded from a magneto optical trap. To generate entanglement between the trapped atom and an emitted photon, the atom is excited via an optical φ-puls...
Book:
02/2004
DOI: 10.13140/RG.2.1.3515.4649
Quantum mechanics is essential for the understanding of many phenomenons in nature – es- pecially in the atomic and subatomic region. But even for macroscopic objects it has to be as- sumed that they ...
Presentation:
11/2002
The preservation of quantum coherence is a fundamental prerequisite for reliable quantum computation, as interactions with the environment and continuous gate imperfections inevitably lead to informat...
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