3 ms·
We have this result already. Interaction with thermal noise ruins wave coherence, and causes classical physics to emerge. This comes when you in a sense repla
by marginalia_nu 2y ago
We have this result already. Interaction with thermal noise ruins wave coherence, and causes classical physics to emerge. This comes when you in a sense replace waves with their average values.
It's not so much a question of scale, but of statistical noisiness. Quantum effects are primarily observable in the low-temperature domain (this is not necessarily "thermometer temperature", but a statistical measure)
- namibj 2y agoEven lasers deal with weird temperatures: they're negative.
- danbruc 2y agoI am not a physicist, but I thought that it is generally accepted that decoherence does not solve the measurement problem. It explains why quantum effects are not observable in a noisy environment but still does not explain the non-unitarity of measurements.
- marginalia_nu 2y agoIt does not solve the measurement problem, but it does explain why you don't see quantum phenomena such as superposition or tunneling at the classical limit.
- ko27 2y agoThis doesn't answer the question. We know how classical physics emerges from a large number of quantum events through statistics. That was not the point of Schrödinger's cat though experiment! The idea is to link a macroscopic event to a random subatomic event that is in a superposition. When or how does the wave function collapse, does it even collapse?
- ruthmarx 2y agoHow is thermal noise different from heat?