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Collapse doesn't occur in MWI.
Loosely speaking a "world" is a complex, causally connected, partially or completely closed set of interacting sub-systems which don't significantly interfere with other, more remote, elements in the superposition... In terms of the wavefunction, a world is a decohered branch of the universal wavefunction, which represents a single macrostate.
The worlds all exist simultaneously in a non-interacting linear superposition. Many Worlds FAQ
A single universe can't account for the superposition of macroscopic objects. This is a matter of information. Qubits entangle the macroscopic object in a state of superposition. This is because the qubit calculates both states i.e. dead/live cat.
The superposition is the branching of macroscopic objects into Parallel universes.
I'm a male so stop saying she.
The quantum device is a qubit, a term that generically refers to a kind of quantum transistor being used for quantum computation, in this case made from an ultrathin aluminum-based superconductor. At extremely cold temperatures, it goes quantum: It exists in an oscillating waveform spanning an excited state, an unexcited state, or both simultaneously, all controlled by electrical currents.
In a study published in September in Nature, Cleland’s team coupled two qubits in what’s known as quantum entanglement, in which the oscillations of one were linked to the oscillations of the other, even when physically distant. That feat drew attention for demonstrating quantum properties in a large, visible system, but the properties themselves still belonged to electrons, in which quantum effects are routinely observed and controlled.
The quantum device is a qubit, a term that generically refers to a kind of quantum transistor being used for quantum computation, in this case made from an ultrathin aluminum-based superconductor...
I really don't know what your objections are. I see you don't fully understand MWI so I don't really see your point. Are you trying to say that superposition isn't real?
A team of scientists has succeeded in putting an object large enough to be visible to the naked eye into a mixed quantum state of moving and not moving.
Originally posted by Matrix Rising
Yes, there is a thing called not moving.
Rest in physics refers to an object being stationary relative to a particular frame of reference or another object. According to the theory of relativity it is said that an object is: at rest relative to another.
Originally posted by Matrix Rising
There's this thing called classical physics and classical physics tells us macroscopic objects are at rest.
Originally posted by Matrix Rising
So a quantum pendulum that represents a subatomic particle never stops moving. A classical pendulum representing a macroscopic object comes to a complete stop.
Originally posted by Matrix Rising
reply to post by EnlightenUp
This is wrong and this is why I objected to the use of the word "collapse" when talking about MWI. There is no collapse in many worlds.
The superposition of states branches into many worlds after decoherence.
Collapse is just wishful thinking. Maybe one day they will discover a mechanism for collapse but that's not today. This is why you hear people say quantum mechanics is incomplete.
They say this because of their belief system not science. They just don't want to accept things like Parallel universes so they say there must be a hidden variable or missing theory that causes "collapse" of the wave function.
So just like source code, you just see what the program produced on the website, you don't see the HTML tags. So you just see a live or dead cat in the universe program not the quantum computation of the wave function software.
This is just conjecture
but there are some Physicist who say the universe is a quantum computer and this would allow you to avoid talk of any kind of collapse but you would still have Parallel Universes.
Originally posted by illumin8ed
There is no true "at rest". So to claim an object is both moving and not moving is a lie. It is always moving in both states.
Originally posted by Matrix Rising
Of course a qubit is a unit of information. Have you ever heard of qubit coupling? You can transfer the state of an entangled particle pair or superposition to another object via qubits. In the experiment they put the paddle in a state of superposition via qubits. They transferred the state of the superconducting electrical circuit to the paddle. Do you understand this is how they will try to scale up quantum computers?
Originally posted by Matrix Rising
I'm talking about motion of subatomic particles relative to classical objects.
So a classical object is at rest relative to a subatomic particle in a state of superposition.