Curieuzer en curieuzer
September 9th, 2010 by Erik
Trouwe lezers weten dat tijd en de perceptie ervan me boeit, en dat tijd soms niet altijd is wat men dacht dat het is.
Discovery Magazine publiceerde in augustus online een artikel dat in april reeds op hun papier gedrukt werd, over hoe het heden niet alleen bepaald wordt door het verleden, maar mogelijk ook door de toekomst.
Retrocausatie is altijd al een leuk onderwerp geweest. En net nu ik Hyperion en The Fall of Hyperion aan het audiolezen ben, waarin de “Shrike” en zijn “Time Tombs” (die achterwaarts in de tijd lijken te bewegen en beschermd worden door een entropisch veld) met hun “Time Tides” (die nabije pelgrims een misselijkmakend déjà-vu gevoel geven) een mysterieuze maar centrale rol spelen.
Lees het artikel hier: Back From The Future.
“Everyone would agree that events in his past have prepared him for today’s excursion. But Tollaksen and his colleagues are investigating a far stranger possibility: It may be not only his past that has led him here today, but his future as well.”
“On a personal scale, it may make us question whether fate is pulling us forward and whether we have free will.”
“And yet, as crazy as it sounds, this notion of reverse causality is gaining ground. A succession of quantum experiments confirm its predictions—showing, bafflingly, that measurements performed in the future can influence results that happened before those measurements were ever made.”
“As the waves pound, it’s tough to decide what is more unsettling: the boat’s incessant rocking or the mounting evidence that the arrow of time—the flow that defines the essential narrative of our lives—may be not just an illusion but a lie.”
“Aharonov accepted that a particle’s past does not contain enough information to fully predict its fate, but he wondered, if the information is not in its past, where could it be? After all, something must regulate the particle’s behavior. His answer—which seems inspired and insane in equal measure—was that we cannot perceive the information that controls the particle’s present behavior because it does not yet exist.”
“Perhaps because of the cognitive dissonance the idea engendered, time-symmetric quantum mechanics did not catch on. “For a long time, it was nothing more than a curiosity for a few philosophers to discuss,” says Sandu Popescu at the University of Bristol, in England, who works on the time-symmetric approach with Aharonov. Clearly Aharonov needed concrete experiments to demonstrate that actions carried out in the future could have repercussions in the here and now.”
“For Aharonov, who has been pushing the idea of backward causality for four decades, the experimental vindication might seem like a time to pop champagne corks, but that is not his style. “I wasn’t surprised; it was what I expected,” he says.”
““The future can only affect the present if there is room to write its influence off as a mistake,” Aharonov says.”


