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Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Philos+Trans+A+Math+Phys+Eng+Sci 2016 ; 374 (2068): ä Nephropedia Template TP
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1?1=Counterfactual: on the potency and significance of quantum non-events #MMPMID27091159
Elitzur AC; Cohen E
Philos Trans A Math Phys Eng Sci 2016[May]; 374 (2068): ä PMID27091159show ga
We study the unique role played in quantum mechanics by non-events or ?counterfactuals?. Our earlier analysis of ?quantum oblivion? has revealed some subtle stages in the measurement process, which may end up in self-cancellation. To these findings, we now add two insights derived by two time-symmetric interpretations of quantum mechanics. (i) Like all quantum interactions, the non-event is formed by the conjunction of forward-plus-backward-evolving wave functions. (ii) Then, it is another feature of such dual evolutions, namely the involvement of negative masses and energies, that enables Nature to make some events ?unhappen? while leaving causal traces.