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Kiki
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Does a superposed state of an electron exist over a larger amount of space than the state of an electron as a particle?
I don't understand what you mean. Can you rephrase the question?Kiki said:Does a superposed state of an electron exist over a larger amount of space than the state of an electron as a particle?
Kiki said:I am comparing the particle version of an electron to the electron in a superposition of possible states. The particle is assumed to be concentrated in one region and not in a superposition, and the particle has experienced decoherence. On the other hand, the electron described by superposition is mathematically composed of a linear combination of states, and I am wondering if those states are thought to exist over a wider range of space than in the space that the particle exists.
I have in mind the state of a free electron as it travels through space. Such an electron would be in superposition with itself, right?PeroK said:I think you are fundamentally misunderstanding the QM nature of an electron. Do you have in mind the state of a free electron after a measurement of its position?
Kiki said:I have in mind the state of a free electron as it travels through space. Such an electron would be in superposition with itself, right?
I am currently learning QM on my own, yes.PeroK said:That statement makes no sense to me. How much QM do you know? Are you learning it yourself?
Kiki said:I am currently learning QM on my own, yes.
Maybe that statement would make more sense in the context of the double slit experiment for electrons. If one electron travels through a double slit diffraction grating, one of the conclusions from that experiment is that the electron interferes with itself when the electron is not measured.
Double-slit experiment. Sorry for the confusion.PeroK said:Are we talking about a free electron or the double-slit experiment?
One last question: do you have a textbook? If not, what are you using to learn QM?
Kiki said:Double-slit experiment. Sorry for the confusion.
I have David Griffith's Introduction to Quantum Mechanics.
Kiki said:Does a superposed state of an electron exist over a larger amount of space than the state of an electron as a particle?
Kiki said:I have read the first three chapters of Griffiths. I have watched some online lectures from universities as well.
If I remember correctly, decoherence is equivalent to wave function collapse. This decoherence, which is a consequence of measurement, causes a particle to be observed.
In the context of the double slit experiment, before measurement at a phosphorescent screen, the particle is mathematically described by a wave function that is a linear combination of states. One conclusion from the double slit experiment is that the electron must behave like a wave in order for the diffraction pattern to appear at a phosphorescent screen. By definition of a wave, this wave has to take up more space than the particle version of an electron that only travels through one slit.
I would like to know how the wave behavior of the electron is linked to the wave function of the electron -- is the wave function of the electron the same as the wave behavior that must occur in order for a diffraction pattern to appear? If so, I think that would imply the wave function of an electron exists across more space than the wave function for the particle version of an electron.
Kiki said:I still have a question though, what is the "wavelike" behavior of the electron?
Here is a useful reference: http://iopscience.iop.org/article/10.1088/1367-2630/15/3/033018/pdf
The superposition of an electron refers to the quantum mechanical principle that an electron can exist in multiple states simultaneously until it is observed or measured.
Superposition allows electrons to exhibit wave-like properties, such as interference and diffraction, in addition to their particle-like behavior. This allows for a more complete understanding of their behavior in various systems.
Superposition is one of the key principles of quantum mechanics and is essential for understanding the behavior of subatomic particles. It also has practical applications in technologies such as quantum computing.
No, superposition is a phenomenon that is only observed at the subatomic level and does not occur in everyday objects. This is due to the large scale and interactions of macroscopic objects, which prevent them from exhibiting quantum behavior.
The uncertainty principle, proposed by Werner Heisenberg, states that it is impossible to know the exact position and momentum of a particle at the same time. Superposition contributes to this uncertainty, as it means that an electron can exist in multiple positions simultaneously until it is observed, making it impossible to determine its exact location.