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在量子力學裡，莫特問題（Mott problem）是一個弔詭，顯示出在研究波函數塌縮 … 在量子力學裡，莫特問題（Mott problem）是一個弔詭，顯示出在研究波函數塌縮與量子測量時所遇到的困難。這問題最先由內維爾·莫特爵士與維爾納·海森堡於1929年表述為在雲室裡，球對稱性波函數塌縮為線形徑跡的弔詭。 實際而言，幾乎所有高能物理學實驗，例如那些在（particle collider）進行的實驗，涉及到的散射波函數都具有球對稱性。可是，粒子碰撞後的偵測結果，總是呈線形徑跡。這真是令人難以揣測，為什麼球對稱性波函數在實驗裏會展現為線形徑跡？然而，這是所有粒子碰撞實驗慣常得到的結果。 1953年，物理學者（Mauritius Renninger）給出一個相關的變版表述，知名為任寧格實驗（Renninger experiment）。在這表述裏，沒有偵測到粒子的事件也可以算為量子測量，換句話說，測量可以被完成，甚至在沒有偵測到任何粒子的狀況下。事件也可以算為量子測量，換句話說，測量可以被完成，甚至在沒有偵測到任何粒子的狀況下。
, In quantum mechanics, the Mott problem is … In quantum mechanics, the Mott problem is a paradox that illustrates some of the difficulties of understanding the nature of wave function collapse and measurement in quantum mechanics. The problem was first formulated in 1929 by Sir Nevill Francis Mott and Werner Heisenberg, illustrating the paradox of the collapse of a spherically symmetric wave function into the linear tracks seen in a cloud chamber. In practice, virtually all high energy physics experiments, such as those conducted at particle colliders, involve wave functions which are inherently spherical. Yet, when the results of a particle collision are detected, they are invariably in the form of linear tracks (see, for example, the illustrations accompanying the article on bubble chambers). It is somewhat strange to think that a spherically symmetric wave function should be observed as a straight track, and yet, this occurs on a daily basis in all particle collider experiments. A related variant formulation was given in 1953 by Mauritius Renninger, and is now known as Renninger's negative-result gedanken experiment. In this formulation, it is noted that the absence of a particle detection can also constitute a quantum measurement; namely, that a measurement can be performed even if no particle whatsoever is detected.ven if no particle whatsoever is detected.
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在量子力學裡，莫特問題（Mott problem）是一個弔詭，顯示出在研究波函數塌縮 … 在量子力學裡，莫特問題（Mott problem）是一個弔詭，顯示出在研究波函數塌縮與量子測量時所遇到的困難。這問題最先由內維爾·莫特爵士與維爾納·海森堡於1929年表述為在雲室裡，球對稱性波函數塌縮為線形徑跡的弔詭。 實際而言，幾乎所有高能物理學實驗，例如那些在（particle collider）進行的實驗，涉及到的散射波函數都具有球對稱性。可是，粒子碰撞後的偵測結果，總是呈線形徑跡。這真是令人難以揣測，為什麼球對稱性波函數在實驗裏會展現為線形徑跡？然而，這是所有粒子碰撞實驗慣常得到的結果。 1953年，物理學者（Mauritius Renninger）給出一個相關的變版表述，知名為任寧格實驗（Renninger experiment）。在這表述裏，沒有偵測到粒子的事件也可以算為量子測量，換句話說，測量可以被完成，甚至在沒有偵測到任何粒子的狀況下。事件也可以算為量子測量，換句話說，測量可以被完成，甚至在沒有偵測到任何粒子的狀況下。
, In quantum mechanics, the Mott problem is … In quantum mechanics, the Mott problem is a paradox that illustrates some of the difficulties of understanding the nature of wave function collapse and measurement in quantum mechanics. The problem was first formulated in 1929 by Sir Nevill Francis Mott and Werner Heisenberg, illustrating the paradox of the collapse of a spherically symmetric wave function into the linear tracks seen in a cloud chamber.the linear tracks seen in a cloud chamber.
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莫特問題
, Mott problem
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