File:SpinEcho GWM stills.jpg
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Size of this preview: 800 × 404 pixels. Other resolutions: 320 × 162 pixels | 640 × 323 pixels | 1,024 × 517 pixels | 2,000 × 1,010 pixels.
Original file (2,000 × 1,010 pixels, file size: 435 KB, MIME type: image/jpeg)
Summary
| Description |
English: Still images from animation of a Hahn echo. Examples of the Hahn echo include the spin echo and the photon echo. The red arrows can be thought of as spins. Applying the first pulse rotates the spins by 90 degrees, producing an equal superposition of spin up and spin down. The spins then "spread out" because each is in a slightly different environment. This spreading out looks like decoherence, but it can be refocused by a second pulse which rotates the spins by 180 degrees. Several simplifications are used in this animation: no decoherence is included and each spin experiences perfect pulses during which the environment provides no spreading. Animation made by Gavin W Morley with POV-Ray; some rights reserved. |
| Date | |
| Source | Own work |
| Author | Gavin W Morley |
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:17, 13 June 2011 | | 2,000 × 1,010 (435 KB) | wikimediacommons>GavinMorley | less bright colours, pulse sequence head-on |
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