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122:
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 until the blue graph appears, when only T2 decoherence is included. Also, each spin experiences perfect pulses during which the environment provides no spreading. Animation made by Gavin W Morley with POV-Ray 3.6 and
Photoshop; some rights reserved. There is a version without the decay here:
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Animation of a Hahn echo decay. This large file does not animate in
Knowledge if it is resized (as of May 2011), due to a bug. 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,
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animation showing the response of spins (red arrows) in the blue
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animation showing the response of spins (red arrows) in the blue
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22:File history
1557:GavinMorley
1527:GavinMorley
1497:GavinMorley
1432:17 May 2011
1261:copyrighted
1235:copyrighted
1216:GavinMorley
1129:GavinMorley
905:slovenščina
271:share alike
265:attribution
173:17 May 2011
109:Description
1567:File usage
1549:640 × 480
1519:640 × 480
1489:640 × 480
1465:Dimensions
1154:some value
1013:Tiếng Việt
995:українська
896:slovenčina
815:Nederlands
779:македонски
473:беларуская
303:Assessment
27:File usage
1709:スピン-スピン緩和
1596:Spin echo
1551:(2.34 MB)
1521:(2.66 MB)
1491:(3.41 MB)
1462:Thumbnail
1459:Date/Time
1417:inception
1407:inception
977:toki pona
887:sicilianu
860:rumantsch
842:português
581:Esperanto
491:български
382:якстересэ
359:Spin echo
355:English:
332:Spin echo
328:English:
202:Licensing
138:якстересэ
118:English:
53:image/gif
1066:Captions
770:lietuvių
707:italiano
671:hrvatski
635:français
563:Ελληνικά
464:جازايرية
396:Polski:
374:Эрзянь:
254:to remix
248:to share
239:license.
183:Own work
152:Polski:
130:Эрзянь:
1704:スピンエコー法
1476:current
1471:Comment
1139:creator
1101:creator
1090:depicts
1070:English
968:Tagalog
932:svenska
878:русский
734:ქართული
689:հայերեն
608:euskara
590:español
572:English
536:Deutsch
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518:čeština
455:العربية
101:Summary
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189:Author
179:Source
157:spinów
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941:தமிழ்
914:shqip
797:मराठी
752:kurdî
653:עברית
626:suomi
617:فارسی
599:eesti
500:বাংলা
1624:Echo
1468:User
725:Jawa
296:true
293:true
169:Date
17:File
1194:URL
1117:URL
1049:+/−
959:ไทย
743:한국어
716:日本語
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
