Fayl:GWM HahnEchoDecay.gif

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GWM_HahnEchoDecay.gif (640 × 480 piksel, fayl hajmi: 3,41 MB, MIME tipi: image/gif, looped, 256 frames, 10 soniya)
Note: Due to technical limitations, thumbnails of high resolution GIF images such as this one will not be animated.

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Taʼrif
English: Animation of a Hahn echo decay. This large file does not animate in Wikipedia 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, 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: File:HahnEcho GWM.gif
Эрзянь: Копорень гайтень анимациясь невит спинэнь реакциянть (якстересэ) сэньсэ Блохонь сферасо.
Polski: Animacja echa spinowego pokazująca reakcję spinów (czerwone strzałki) w sferze Blocha (niebieska) na sekwencję impulsów (zielone).
Sanasi
Manba Oʻzimning ishim
Muallif Gavin W Morley

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Assessment

Media of the day This file was selected as the media of the day for 28 June 2020. It was captioned as follows:
English: Spin echo animation showing the response of spins (red arrows) in the blue Bloch sphere to the green pulse sequence.
Other languages
English: Spin echo animation showing the response of spins (red arrows) in the blue Bloch sphere to the green pulse sequence.
Эрзянь: Копорень гайтень анимациясь невит спинэнь реакциянть (якстересэ) сэньсэ Блохонь сферасо.
Polski: Animacja echa spinowego pokazująca reakcję spinów (czerwone strzałki) w sferze Blocha (niebieska) na sekwencję impulsów (zielone).

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Spin echo decay animation by Gavin W Morley.

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tasvirlangan obyekt

tashkil etilgan

17 may 2011

Fayl tarixi

Faylning biror paytdagi holatini koʻrish uchun tegishli sana/vaqtga bosingiz.

Sana/VaqtMiniaturaOʻlchamlariFoydalanuvchiIzoh
joriy17:27, 2011-yil 13-iyun17:27, 2011-yil 13-iyun dagi versiya uchun tasvir640 × 480 (3,41 MB)wikimediacommons>GavinMorleyclearer Bloch sphere

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