Applications of Quantum Mechanics: One-Dimensional Simple Harmonic Oscillator

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Questions and Answers

What is the coefficient of 𝟐 𝛙 in the expression provided?

  • -𝛃
  • -𝛃²
  • +𝛃²
  • +𝛃 (correct)

Which term represents the constant in the given expression?

  • −𝛃𝟐 𝟐
  • +𝛃²
  • −𝛃
  • 𝐜𝐨𝐧𝐬𝐭 (correct)

What happens to the coefficient of 𝟐 𝛙 if we change the sign of 𝛃 in the expression?

  • It becomes zero
  • It remains unchanged
  • It becomes negative (correct)
  • It becomes positive

Which term would change if we squared all terms in the given expression?

<p>-𝛃² (A)</p> Signup and view all the answers

If we add an extra term 𝛾 to the expression, where should it be placed based on the structure?

<p>After the coefficient term of 𝟐 𝛙 (B)</p> Signup and view all the answers

What is the value of α in the given context?

<p>2n + 1 (C)</p> Signup and view all the answers

Based on the given equation, what condition must be satisfied for ν to be finite?

<p>An+1 = 0 (B)</p> Signup and view all the answers

In the context provided, what does An+2 represent?

<p>(n + 2)(n + 1)An (B)</p> Signup and view all the answers

For the given equation to hold true, what is the value of An when n = 0?

<p>1 (A)</p> Signup and view all the answers

What is the implication of An+2 = 0 in this scenario?

<p>An = 0 is invalid (C)</p> Signup and view all the answers

What type of force does the one-dimensional simple harmonic oscillator move under?

<p>Restoring force (A)</p> Signup and view all the answers

In which position does the restoring force aim to return the harmonic oscillator?

<p>Equilibrium position (A)</p> Signup and view all the answers

What is the main feature of the motion of a one-dimensional simple harmonic oscillator?

<p>Periodic motion (D)</p> Signup and view all the answers

Which term best describes the force responsible for bringing the oscillator back to equilibrium?

<p>Restoring force (C)</p> Signup and view all the answers

What happens to the simple harmonic oscillator when it reaches its equilibrium position?

<p>It momentarily stops (D)</p> Signup and view all the answers

What does Eq.(25) represent in the context of the text?

<p>Energy eigenvalues of the simple harmonic oscillator (B)</p> Signup and view all the answers

How is the energy of a simple harmonic oscillator described in the text?

<p>Quantized (D)</p> Signup and view all the answers

In what manner is the energy eigenvalues of the simple harmonic oscillator described?

<p>Quantized (C)</p> Signup and view all the answers

Which term best describes the energy levels of a simple harmonic oscillator, based on Eq.(25)?

<p>Discrete (B)</p> Signup and view all the answers

What characteristic is associated with the energy levels of a simple harmonic oscillator as per the information provided?

<p>Indivisible (B)</p> Signup and view all the answers

In terms of harmonic oscillators, which statement accurately distinguishes classical mechanics from quantum mechanics?

<p>Classical mechanics treats harmonic oscillators as continuous while quantum mechanics treats them as discrete. (A)</p> Signup and view all the answers

How do classical mechanics and quantum mechanics differ in their treatment of harmonic oscillator energy levels?

<p>Classical mechanics allows for continuous energy levels, while quantum mechanics has discrete energy levels. (C)</p> Signup and view all the answers

Which characteristic defines how classical and quantum mechanics treat harmonic oscillators differently?

<p>Quantum mechanics introduces wave functions to describe the state of a harmonic oscillator, while classical mechanics does not. (A)</p> Signup and view all the answers

How do classical and quantum mechanics differ in predicting the behavior of harmonic oscillators?

<p>Classical mechanics can predict exact positions and momenta, while quantum mechanics provides probabilistic information. (C)</p> Signup and view all the answers

Which statement accurately represents the difference in predicting harmonic oscillator states between classical and quantum mechanics?

<p>In classical mechanics, the exact state of a harmonic oscillator can be determined, while in quantum mechanics, only probabilities are provided. (C)</p> Signup and view all the answers

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Study Notes

Quantum Mechanics: One Dimensional Simple Harmonic Oscillator

  • The simple harmonic oscillator moves under a restoring force that tries to restore it to the equilibrium position.
  • The energy of a simple harmonic oscillator is quantized or discrete, which is represented by equation (25).
  • The energy eigenvalues are given by equation (25).

Differences between Classical Mechanics and Quantum Mechanics

  • In classical mechanics, the energy of a simple harmonic oscillator is continuous, whereas in quantum mechanics, it is quantized or discrete.
  • The harmonic oscillator's behavior is fundamentally different in classical mechanics and quantum mechanics.

Mathematical Derivations

  • Equation (12) can be rewritten as +𝛃𝟐 𝟐 𝛙 = 𝐜𝐨𝐧𝐬𝐭.𝐞 −𝛃𝟐 𝟐 + 𝐜𝐨𝐧𝐬𝐭.
  • Substituting equations (16), (19), and (20) into equation (15) yields: ∞ ෍ (𝐧 + 𝟐)(𝐧 + 𝟏)𝐀𝐧+𝟐 − 𝟐𝐧 + 𝟏 − 𝛂 𝐀𝐧 𝛃𝐧 = 𝟎 𝐧=𝟎
  • Solving for 𝐀𝐧+𝟐, we get: 𝐀𝐧+𝟐 = 𝟎
  • This leads to: 𝟐𝐧 + 𝟏 − 𝛂 = 𝟎
  • Consequently, 𝛂 = 𝟐𝐧 + 𝟏

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