Changes

Quantum tunnelling is important in [[radioactivity|radioactive decay]], when an unstable nucleus emits a particle, it utilizes quantum tunnelling to do so.

Quantum tunnelling is important in [[radioactivity|radioactive decay]], when an unstable nucleus emits a particle, it utilizes quantum tunnelling to do so.

'''Quantum tunnelling''' is forbidden under classical physics. The instantaneous nature of quantum tunnelling appears to defy the [[theory of relativity]], but it is in fact compatible.<ref>http://m.phys.org/news/2015-05-physicists-quantum-tunneling-mystery.html</ref>

Quantum tunnelling is forbidden under classical physics. The instantaneous nature of quantum tunnelling appears to defy the [[theory of relativity]], but it is in fact compatible.<ref>http://m.phys.org/news/2015-05-physicists-quantum-tunneling-mystery.html</ref>

 

Quantum tunnelling is considered instanteous in the Copenhagen Interpretion, which is the orthodox view of quantum mechanics. In a experiment published in July 2020, rubidium atoms tunnelled through a 1.3 micrometer barrier in 0.61 milliseconds.<ref>"[https://www.nature.com/articles/s41586-020-2490-7 Measurement of the time spent by a tunnelling atom within the barrier region]," ''Nature'', July 2020.</ref>

==Mathematics==

==Mathematics==