Using the eigenvectors of the quantum harmonic oscillator, i.e., |n >, find the matrix element < 11|P|10 >,where P is the momentum operator. 11mwħ 9mwh 2 O iv5mwħ O iv6mwħ о

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### Quantum Harmonic Oscillator Problem

**Question:**

Using the eigenvectors of the quantum harmonic oscillator, i.e., \(|n\rangle\), find the matrix element \(\langle 11|P|10 \rangle\), where \(P\) is the momentum operator.

**Options:**

1. \(\large i \sqrt{\frac{11m\omega \hbar}{2}}\)

2. \(\large i \sqrt{\frac{9m\omega \hbar}{2}}\)

3. \(\large i \sqrt{5m\omega \hbar}\)

4. \(\large i \sqrt{6m\omega \hbar}\)

**Explanation:**

In this problem, you are asked to compute a specific matrix element of the momentum operator \(P\) between two eigenstates \(|11\rangle\) and \(|10\rangle\) of the quantum harmonic oscillator.

The options provide different expressions involving the mass \(m\), the angular frequency \(\omega\), and the reduced Planck constant \(\hbar\). Each expression also contains the imaginary unit \(i\) and a square root. The task is to determine which of these expressions correctly represents the matrix element \(\langle 11|P|10 \rangle\).

This problem is a typical exercise in quantum mechanics involving the use of ladder operators and the properties of harmonic oscillator eigenstates.
Transcribed Image Text:### Quantum Harmonic Oscillator Problem **Question:** Using the eigenvectors of the quantum harmonic oscillator, i.e., \(|n\rangle\), find the matrix element \(\langle 11|P|10 \rangle\), where \(P\) is the momentum operator. **Options:** 1. \(\large i \sqrt{\frac{11m\omega \hbar}{2}}\) 2. \(\large i \sqrt{\frac{9m\omega \hbar}{2}}\) 3. \(\large i \sqrt{5m\omega \hbar}\) 4. \(\large i \sqrt{6m\omega \hbar}\) **Explanation:** In this problem, you are asked to compute a specific matrix element of the momentum operator \(P\) between two eigenstates \(|11\rangle\) and \(|10\rangle\) of the quantum harmonic oscillator. The options provide different expressions involving the mass \(m\), the angular frequency \(\omega\), and the reduced Planck constant \(\hbar\). Each expression also contains the imaginary unit \(i\) and a square root. The task is to determine which of these expressions correctly represents the matrix element \(\langle 11|P|10 \rangle\). This problem is a typical exercise in quantum mechanics involving the use of ladder operators and the properties of harmonic oscillator eigenstates.
Expert Solution
Step 1

Given,

Maxtrix element of momentum operator for harmonic quantum oscillator

Step 2

We know that 

<n'P^n>=imhw2-nδn',n-1+n+1δn',n+1

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