Does QM Use n-Dimensional or Infinite Dimensional Integrals?

In summary, n-dimensional integrals in quantum mechanics involve a finite number of dimensions, while infinite dimensional integrals involve an infinite number of dimensions. Quantum mechanics uses both types of integrals, depending on the complexity of the problem. These integrals are used to solve equations and calculate important quantities in quantum mechanics. Examples of problems that require infinite dimensional integrals include the quantum harmonic oscillator and the Schrodinger equation. However, there are limitations to using infinite dimensional integrals, such as computational challenges and the need for renormalization techniques in quantum field theory.
  • #1
benorin
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Much as the title of this thread asks: does quantum mechanics use n-dimensional or infinite dimensional integrals? I'm merely curious as I studied the n-dimensional case as a hobby and wondered if I'd ever get to use it for anything cool like QM. If so, please maybe post one such integral so I can play with it. Thanks.
 
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  • #2
It uses both. The Feynman path integral is always infinite-dimensional, but the integrals defining inner products are (for systems with finitely many particles only) always finite-dimensional.
 
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1. What is the difference between n-dimensional and infinite dimensional integrals in quantum mechanics?

In quantum mechanics, n-dimensional integrals refer to integrals that involve a finite number of dimensions, while infinite dimensional integrals refer to integrals that involve an infinite number of dimensions.

2. Does quantum mechanics use n-dimensional or infinite dimensional integrals?

Quantum mechanics uses both n-dimensional and infinite dimensional integrals, depending on the specific problem being solved. In many cases, n-dimensional integrals are sufficient, but for more complex systems, infinite dimensional integrals may be necessary.

3. How are n-dimensional and infinite dimensional integrals used in quantum mechanics?

In quantum mechanics, n-dimensional and infinite dimensional integrals are used to solve mathematical equations that describe the behavior of particles on a quantum scale. They are used to calculate probabilities, expectation values, and other important quantities in quantum mechanics.

4. What are some examples of problems in quantum mechanics that require infinite dimensional integrals?

Some examples of problems in quantum mechanics that require infinite dimensional integrals include the quantum harmonic oscillator, the Schrodinger equation for a particle in a potential well, and the path integral formulation of quantum mechanics.

5. Are there any limitations to using infinite dimensional integrals in quantum mechanics?

While infinite dimensional integrals are necessary for solving certain problems in quantum mechanics, they can also be computationally challenging and may require numerical approximations. Additionally, the use of infinite dimensional integrals in quantum field theory can lead to mathematical difficulties and the need for renormalization techniques.

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