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entropy1
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Suppose we have a pair of entangled particles. Suppose the first particle of the pair interacts with a macro-object and decoheres. Does the macro object get entangled with the second particle?
I would say yes, as that follows from the Schrodinger equation.entropy1 said:Suppose we have a pair of entangled particles. Suppose the first particle of the pair interacts with a macro-object and decoheres. Does the macro object get entangled with the second particle?
The entire quantum system consisting of two particles and the macroscopic object is always - before, during, and after the experiment - in a single state. At no time does it ever make sense to talk about anything not being in a single state.entropy1 said:If I understand correctly, decoherence of a particle in a macro object leaves the macro object in a single state, is that correct?
[PLAIN said:https://en.wikipedia.org/wiki/Double-slit_experiment]In[/PLAIN] 1999, the double-slit experiment was successfully performed with buckyball molecules (each of which comprises 60 carbon atoms).[26][50] A buckyball is large enough (diameter about 0.7 nm, nearly half a million times larger than a proton) to be seen under an electron microscope.
That state being a superposition of possible outcomes?Nugatory said:The entire quantum system consisting of two particles and the macroscopic object is always - before, during, and after the experiment - in a single state. At no time does it ever make sense to talk about anything not being in a single state.
In general no, it's a density matrix. It may be a pure state which can be represented as a ray in some Hilbert space, and if so we can choose a basis in which it will be a superposition of possible outcomes (and other bases in which it will not be such a superposition).StevieTNZ said:That state being a superposition of possible outcomes?
You're asking the English language to do more than it is capable of. The mathematical formalism is clear and properly describes entanglement and decoherence; natural language does not.entropy1 said:So, in all, I understand that it is possible to entangle particle B of an entangled pair A-B with macro-object O, in the case that particle A interacts and decoheres in object O, so that O and B become entangled? Is this dependent of the interpretation of QM used?
No, macro-object entanglement can also occur in classical systems. In fact, it has been observed in various physical systems such as mechanical oscillators, superconductors, and optomechanical systems.
Macro-object entanglement is a type of entanglement that occurs between two large, macroscopic objects. It differs from quantum entanglement in that it involves the entanglement of many particles, rather than just two. Additionally, macro-object entanglement is more robust and can persist for longer periods of time compared to quantum entanglement.
No, macro-object entanglement cannot be observed directly. This is because it requires precise measurements of multiple particles, which is currently not possible with our technology. However, indirect evidence of macro-object entanglement can be observed through the effects it has on the behavior of the objects.
At this point, macro-object entanglement is mainly a topic of scientific research and has not yet been utilized for practical applications. However, scientists are exploring potential applications in areas such as quantum computing, communication, and sensing.
Yes, macro-object entanglement can be created artificially in controlled laboratory settings. This is typically achieved by cooling the objects to extremely low temperatures and using specialized equipment to entangle them. However, the process is still very challenging and requires precise control and manipulation of the objects involved.