hawksmere Posted October 20, 2011 Posted October 20, 2011 (edited) According to quantum tunnelling an electron takes every possible path? Reading Brian Green's book - the elegant universe - he mentions that when Heisenberg was toying With the uncertainty principle he encountered quantum tunnelling where positrons and/or electrons have no exact position and momentum that can be measured. But i thought penning traps did just that? If so, how did penning trap electrons and indeed anti-matter for upto a week if it's exact location AND velocities cannot be measured? Edited October 20, 2011 by hawksmere
swansont Posted October 20, 2011 Posted October 20, 2011 Penning traps don't measure exact locations. The confined articles are not stationary — they are moving in an orbit and you can determine oscillation frequencies quite precisely, so you can make spectroscopic measurements. But that does not require exact position information.
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