1) Lets describe a particle in a 1-d periodic box with no potential energy. a) Give...
1) Lets describe a particle in a 1-d periodic box with no potential energy.
a) Give the probability that the particle can be found in the middle half of the box with n=1, and compare it with the probability for a particle in a box (P=0.82).
Homework Answers
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1) Lets describe a particle in a 1-d periodic box with no
potential energy.
a) Give...
3. A particle is in a 1D box (infinite potential well) of dimension, a, situated symmetrically ab...
3. A particle is in a 1D box (infinite potential well) of dimension, a, situated symmetrically about the origin of the x-axis. A measurement of energy is made and the particle is found to have the ground state energy: 2ma The walls of the box are expanded instantaneously, doubling the well width symmetrically about the origin, leaving the particle in the same state. a) Sketch the initial potential well making it symmetric about x - 0 (note this is different...
The energy levels for a particle in a 1-D box of dimension (L) is provided by...
The energy levels for a particle in a 1-D box of dimension (L) is provided by the following expression: n h2 E, 2mL2 where m is the mass of the particle, h-bar = h/2 andn is the quantum number. Evaluate the energy associated with the first level (n 1) for an argon atom in a 10 A 1-D box. Select one: a. 8.27 x 10-25 kJ/mol b. 4.98 x 10 1 kJ/mol c. 8.27 x 1028 kJ/mol d. 4.98 x...
2.2 Two-level system A particle in the box is described by the following wavefunction 1 1...
2.2 Two-level system A particle in the box is described by the following wavefunction 1 1 V(x, t) + V2 V2 = Um(x)e -i(Em/h) In other words, this state is a superposition of two modes: n-th, and m-th. A superposition that involves only two modes (not necessarily particle in the box modes, but any two modes) is called a "two-level system”. A more modern name for such a superposition is a "qubit”. a) Come up with an expression for the...
1. Imagine a version of the particle in a box where the potential is given by:...
1. Imagine a version of the particle in a box where the potential is given by: b-1 b-1 oootherwise where b is any real number greater than or equal to 2 a) Assuming that > Vo for all n, use the WKB approximation to find the energies. Give your final answer in terms of b, b, and E b) What happens in either extreme, as b approaches 2 or o°? Does the WKB approximation give the exact answers in these...
Question 5. A particle in an infinite potential energy well of width a. The particle is...
Question 5. A particle in an infinite potential energy well of width a. The particle is at the state of n=5. The probability of finding particle in the region [a/10, 4a/5] is: A. 0.8 B. 0.4 C. 0.3 D. 0.7
Particle in a box Figure 1 is an illustration of the concept of a particle in...
Particle in a box Figure 1 is an illustration of the concept of a particle in a box. V=00 V=00 V=0 Figure 1. A representation of a particle in a box, where the potential energy, V, is zero between x = 0 and x = L and rises abruptly to infinity at the walls. The Schrödinger equation for a particle in a box reads t² d²u Y +V(x)y = Ey 2m dx2 + (1) where ħ=h/21 , y represents the...
A 1kg particle is in a region where the potential energy can be represented by the...
A 1kg particle is in a region where the potential energy can be represented by the function U(x) = x 2 − 5, where using x in meters will give you U in J. The particle is released from rest at x = 2.0m. (a)In which direction does it move? Why? (b)What is its velocity when it has moved 2m? (c)Where does the particle first come to rest after you release it? (d)Describe the long-term motion of the particle.
For the particle-in-a-box of length a, assume that instead of a sine function, the ground state wavefunction is an upside-down parabola at the center of the box, b/2. What is the total energy of...
For the particle-in-a-box of length a, assume that instead of a sine function, the ground state wavefunction is an upside-down parabola at the center of the box, b/2. What is the total energy of the trial system and what is the wavefunction of the system. Now compare your result to the particle-in-a-box where the potential energy inside the box is zero, what is the difference of percentage of both systems?
For the particle-in-a-box of length a, assume that instead of...
1- An infinite potential box containing a particle of mass m is Perturbed as shown below....
1- An infinite potential box containing a particle of mass m is Perturbed as shown below. i. Find the 1st order correction to the G.S. Energy of the particle. (10 points) 0.5 -0.5. E°(n=1) ii- Find the 1st order correction (the 1st non-zero term) to the G.S. Wave Function of the particle. (15 points). iii- Find the 2nd order correction to the G.S. Energy of the particle. (15 points)
Consider a perturbed particle in a box, with potential energy: for x <-L/2 2brx/L for -1/2sxSL2 for x >L/2 nd confining the zero order functions to n-1,2, 3, 4 (i.e. the lowest four Using M...
Consider a perturbed particle in a box, with potential energy: for x <-L/2 2brx/L for -1/2sxSL2 for x >L/2 nd confining the zero order functions to n-1,2, 3, 4 (i.e. the lowest four Using Matrix algebra, and confining the zero order functions to n solutions to the unperturbed particle in a box problem) determine the energy of the l (Hint: In diagonalizing a matrix, you may reorder the quantum numbers in any way you like). d)
Consider a perturbed particle...
3. A particle is in a 1D box (infinite potential well) of dimension, a, situated symmetrically about the origin of the x-axis. A measurement of energy is made and the particle is found to have the ground state energy: 2ma The walls of the box are expanded instantaneously, doubling the well width symmetrically about the origin, leaving the particle in the same state. a) Sketch the initial potential well making it symmetric about x - 0 (note this is different...
The energy levels for a particle in a 1-D box of dimension (L) is provided by the following expression: n h2 E, 2mL2 where m is the mass of the particle, h-bar = h/2 andn is the quantum number. Evaluate the energy associated with the first level (n 1) for an argon atom in a 10 A 1-D box. Select one: a. 8.27 x 10-25 kJ/mol b. 4.98 x 10 1 kJ/mol c. 8.27 x 1028 kJ/mol d. 4.98 x...
2.2 Two-level system A particle in the box is described by the following wavefunction 1 1 V(x, t) + V2 V2 = Um(x)e -i(Em/h) In other words, this state is a superposition of two modes: n-th, and m-th. A superposition that involves only two modes (not necessarily particle in the box modes, but any two modes) is called a "two-level system”. A more modern name for such a superposition is a "qubit”. a) Come up with an expression for the...
1. Imagine a version of the particle in a box where the potential is given by: b-1 b-1 oootherwise where b is any real number greater than or equal to 2 a) Assuming that > Vo for all n, use the WKB approximation to find the energies. Give your final answer in terms of b, b, and E b) What happens in either extreme, as b approaches 2 or o°? Does the WKB approximation give the exact answers in these...
Question 5. A particle in an infinite potential energy well of width a. The particle is at the state of n=5. The probability of finding particle in the region [a/10, 4a/5] is: A. 0.8 B. 0.4 C. 0.3 D. 0.7
Particle in a box Figure 1 is an illustration of the concept of a particle in a box. V=00 V=00 V=0 Figure 1. A representation of a particle in a box, where the potential energy, V, is zero between x = 0 and x = L and rises abruptly to infinity at the walls. The Schrödinger equation for a particle in a box reads t² d²u Y +V(x)y = Ey 2m dx2 + (1) where ħ=h/21 , y represents the...
For the particle-in-a-box of length a, assume that instead of a sine function, the ground state wavefunction is an upside-down parabola at the center of the box, b/2. What is the total energy of the trial system and what is the wavefunction of the system. Now compare your result to the particle-in-a-box where the potential energy inside the box is zero, what is the difference of percentage of both systems?
For the particle-in-a-box of length a, assume that instead of...
1- An infinite potential box containing a particle of mass m is Perturbed as shown below. i. Find the 1st order correction to the G.S. Energy of the particle. (10 points) 0.5 -0.5. E°(n=1) ii- Find the 1st order correction (the 1st non-zero term) to the G.S. Wave Function of the particle. (15 points). iii- Find the 2nd order correction to the G.S. Energy of the particle. (15 points)
Consider a perturbed particle in a box, with potential energy: for x <-L/2 2brx/L for -1/2sxSL2 for x >L/2 nd confining the zero order functions to n-1,2, 3, 4 (i.e. the lowest four Using Matrix algebra, and confining the zero order functions to n solutions to the unperturbed particle in a box problem) determine the energy of the l (Hint: In diagonalizing a matrix, you may reorder the quantum numbers in any way you like). d)
Consider a perturbed particle...
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