Quantum Time Machine - How the future can change what happens now. #quantumfan
IF YOU were to break your arm tomorrow afternoon, would you suddenly find it hanging useless in a sling this morning? Of course not – the question makes no sense. Cause always precedes effect. But maybe life isn’t quite so straightforward for a photon. In the subatomic realm, where the laws of quantum physics make seemingly impossible feats routine, the one thing that we always considered beyond the pale might just be true.
This idea that the future can influence the present, and that the present can influence the past, is known as retrocausality. It has been around for a while without ever catching on – and for good reason, because we never see effects happen before their causes in everyday life. But now, a fresh twist on a deep tension in the foundations of quantum theory suggests that we may have no choice but to think again.
No one is saying time travel is anything other than fantasy. But if the theorists going back to the future with retrocausality can make it stick, the implications would be almost as mind-boggling. They could not only explain the randomness seemingly inherent to the quantum world, but even remake it in a way that finally brings it into line with Einstein’s ideas of space and time – an achievement that has eluded physicists for decades. “If you allow retrocausality, it is possible to have a theory of reality that’s more compatible with lots of things that we think should be true,” says Matthew Leifer at Chapman University in Orange, California. #quantum#physics#quantumtimemachine#idea#quantumtheory#einsteintheory...!!
Quantum computers are incredibly powerful machine that take a new approach to processing information . Built on the principles of quantum machine ,they exploits complex and fascinating laws of nature that are always there,but usually remain hidden from view.By harnessing such natural behavior ,quantum computing can run new type of algorithms to process information more holistically.
classical computers encode information in bits. Each bit can take the value of 1 or 0.These 1s or 0s act as on/off switch that ultimately drive computers functions. Quantum computer ,on the other hand are based on qubits, which operate according to two key principles of quantum physics. Superposition and entanglement. Superposition means that each qubit can represent both 1 or 0 at the same time . Entanglement means that qubits in superposition can be correlate with each other ; that is ,the state of one can depend on the state of another.
D-wave's qubits are much easier to build than the equivalent in more traditional computers , but their quantum states are also more fragile and their manipulation less precise. #quantum#cumputers#brain#superposition#entanglement#powerfulmachine#quantummachine#quantumfan#qubits#bits#encode#coding#algorithms#quantumcuriosity#369...!!