Does Potential in Quantum Mechanics Only Refer to Electrical Potentials?

In summary, the speaker has received a physics degree and completed a quantum mechanics course. They plan on entering grad school in physics but have a question about the use of "potential" in QM. They ask if it always refers to an electrical potential or if it can also refer to gravitational potentials. The other speakers agree that it can refer to both, depending on the problem at hand. They also provide a reference for further reading on the topic.
  • #1
Physics_UG
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so I received a physics degree and finished a quantum mechanics course. I plan on entering grad school in physics. However, I have a dumb question. When referring to a "potential" in QM (such as if you solve the wavefunction for an electron in a periodic potential) does it always refer to an electrical potential? Can it refer to, for instance, gravitational potentials too?

Thanks.
 
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  • #2
I would say yes. Any potential that effects the energy...
 
  • #3
I think it depends on the problem: for electrons gravity is very small compared to electric field so the potential is primarily from the electric field and we discount gravity. For particles concerned with the nuclear forces then the potential would be from the strong nuclear force and we'd discount the electric field...
 
  • #6
great! thanks guys!
 

FAQ: Does Potential in Quantum Mechanics Only Refer to Electrical Potentials?

What is quantum mechanics?

Quantum mechanics is a branch of physics that studies the behavior of matter and energy at a very small scale, such as atoms and subatomic particles. It explains the behavior and interactions of these particles through mathematical equations and principles.

Why is quantum mechanics important?

Quantum mechanics is important because it helps us understand the fundamental building blocks of the universe and how they behave. It also plays a crucial role in modern technology, such as in the development of computers, lasers, and medical imaging.

How does quantum mechanics differ from classical mechanics?

Classical mechanics is a set of principles that describe the behavior of objects on a macroscopic scale, while quantum mechanics deals with the behavior of particles on a microscopic scale. Quantum mechanics also introduces concepts such as superposition and uncertainty, which do not exist in classical mechanics.

What is the Heisenberg uncertainty principle?

The Heisenberg uncertainty principle is a fundamental principle in quantum mechanics that states that it is impossible to know both the exact position and momentum of a particle at the same time. This is because the act of measuring one property will affect the other, making it impossible to determine both with 100% accuracy.

Can quantum mechanics explain everything?

No, quantum mechanics cannot explain everything. While it can accurately describe the behavior of particles at a small scale, it does not fully explain the behavior of larger objects or the force of gravity. This is why there are still ongoing debates and research in the field of quantum mechanics.

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