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[h=1]Einstein saves the quantum cat[/h]رفتم دنبالش ببینم چه خبره که از نشریه ی Nature سر در آوردم
Universal decoherence due to gravitational time dilation
: Abstract
The physics of low-energy quantum systems is usually studied without explicit consideration of the background spacetime.
Phenomena inherent to quantum theory in curved spacetime, such as Hawking radiation, are typically assumed to be relevant
only for extreme physical conditions: at high energies and in strong gravitational fields. Here we consider low-energy quantum
mechanics in the presence of gravitational time dilation and show that the latter leads to the decoherence of quantum
superpositions. Time dilation induces a universal coupling between the internal degrees of freedom and the centre of mass
of a composite particle. The resulting correlations lead to decoherence in the particle position, even without any external
environment. We also show that the weak time dilation on Earth is already su cient to aect micrometre-scale objects.
Gravity can therefore account for the emergence of classicality and this eect could in principle be tested in future matter-
wave experiments.
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پیروز باشید
امروز تیتر جالبی توجهمو جلب کرد
تیتر این بود :
[h=1]Einstein saves the quantum cat[/h]رفتم دنبالش ببینم چه خبره که از نشریه ی Nature سر در آوردم
Universal decoherence due to gravitational time dilation
: Abstract
The physics of low-energy quantum systems is usually studied without explicit consideration of the background spacetime.
Phenomena inherent to quantum theory in curved spacetime, such as Hawking radiation, are typically assumed to be relevant
only for extreme physical conditions: at high energies and in strong gravitational fields. Here we consider low-energy quantum
mechanics in the presence of gravitational time dilation and show that the latter leads to the decoherence of quantum
superpositions. Time dilation induces a universal coupling between the internal degrees of freedom and the centre of mass
of a composite particle. The resulting correlations lead to decoherence in the particle position, even without any external
environment. We also show that the weak time dilation on Earth is already su cient to aect micrometre-scale objects.
Gravity can therefore account for the emergence of classicality and this eect could in principle be tested in future matter-
wave experiments.
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