Posted on Dec 26, 2022
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Schrödinger's cat type experiment.
Possible application to quantum computing and to better understanding quantum properties of gravity.
"For the first time, physicists have made light appear to move simultaneously forward and backward in time. The new technique could help scientists improve quantum computing and understand quantum gravity."
Possible application to quantum computing and to better understanding quantum properties of gravity.
"For the first time, physicists have made light appear to move simultaneously forward and backward in time. The new technique could help scientists improve quantum computing and understand quantum gravity."
Physicists made Light move Simultaneously Forward and Backward in Time using 'Quantum time flip'
Posted from guardianmag.usPosted in these groups: 
Physics
Physics
Posted >1 y ago
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SGT Mary G.
...""The superposition of processes we realized is more akin to an object spinning clockwise and counter-clockwise at the same time," Strömberg said.The researchers created their time-flipped photon out of intellectual curiosity, but follow-up experiments showed that time flips can be paired with reversible logic gates to enable simultaneous computation in either direction, thus opening the way for quantum processors with greatly enhanced processing power.
Theoretical possibilities also sprout from the work. A future theory of quantum gravity, which would unite general relativity and quantum mechanics, should include particles of mixed time orientations like the one in this experiment, and could enable the researchers to peer into some of the universe's most mysterious phenomena.
"A nice way to put it is to say that our experiment is a simulation of exotic scenarios where a photon might evolve forward and backward in time," Giulio Chiribella, a physicist at the University of Oxford who was the lead author of the other paper, told Live Science. "What we do is an analogue to some experiments that simulate exotic physics, such as the physics of black holes or time travel."
...""The superposition of processes we realized is more akin to an object spinning clockwise and counter-clockwise at the same time," Strömberg said.The researchers created their time-flipped photon out of intellectual curiosity, but follow-up experiments showed that time flips can be paired with reversible logic gates to enable simultaneous computation in either direction, thus opening the way for quantum processors with greatly enhanced processing power.
Theoretical possibilities also sprout from the work. A future theory of quantum gravity, which would unite general relativity and quantum mechanics, should include particles of mixed time orientations like the one in this experiment, and could enable the researchers to peer into some of the universe's most mysterious phenomena.
"A nice way to put it is to say that our experiment is a simulation of exotic scenarios where a photon might evolve forward and backward in time," Giulio Chiribella, a physicist at the University of Oxford who was the lead author of the other paper, told Live Science. "What we do is an analogue to some experiments that simulate exotic physics, such as the physics of black holes or time travel."
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