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Problem 4.1 - Odd Bound States for the Finite Square Well Consider the finite square well...
3. This problem relates to the bound states of a finite-depth square well potential illustrated in...
3. This problem relates to the bound states of a finite-depth square well potential illustrated in Fig. 3. A set of solutions illustrated in Fig. 4, which plots the two sides of the trancendental equation, the solutions to which give the bound state wave functions and energies. In answering this problem, refer to the notation we used in class and that on the formula sheet. Two curves are plotted that represent different depths of the potential well, Voi and Vo2...
1. An electron in a finite well An electron is in a finite square well that is 20 eV deep and 0.2...
1. An electron in a finite well An electron is in a finite square well that is 20 eV deep and 0.25 nm wide. You may use all results from class/textbook without re-deriving therm A. (2 pts) By graphing both sides of the quantization condition like we did in class, determine how many bound energy eigenstates exist for this well. Don't forget that there are two quantization conditions, one for the even solutions, and one for the odd solutions! B....
1. A particle of mass m moves in the one-dimensional potential: x<-a/2 x>a/2 Sketch the potential....
1. A particle of mass m moves in the one-dimensional potential: x<-a/2 x>a/2 Sketch the potential. Sketch what the wave functions would look like for α = 0 for the ground state and the 1st excited state. Write down a formula for all of the bound state energies for α = 0 (no derivation necessary). a) b) Break up the x axis into regions where the Schrödinger equation is easy to solve. Guess solutions in these regions and plug them...
The Finite Square Wel A more realistic version of the infinite square well potential has a...
The Finite Square Wel A more realistic version of the infinite square well potential has a finite well depth: -a V(x)--V for -a<x <a for x <-a,'r > a =0 This assignment will consider the bound states of a particle (of mass m) in this potential (i.e. total energy E <0). (1) Determine the general solutions to the time-independent Schrödinger equation for the three regions x <-a, -a<x <a, and > a. Write these solutions in terms of k and...
Consider a particle of mass in a 10 finite potential well of height V. the domain...
Consider a particle of mass in a 10 finite potential well of height V. the domain – a < x < a. a) Show that solutions for – a < x < a take the form on (x) = A cos(knx) for odd n, and on (x) = A sin(knx) for even n. . Show a) Match the boundary conditions at x = a to prove that cos(ka) = Bk where k is the wave vector for -a < x...
Consider the Kronig-Penney model discussed in the lectures, where the periodic potential corresponds to an array of del...
Consider the Kronig-Penney model discussed in the lectures, where the periodic potential corresponds to an array of delta functions: However, unlike the usual model, we will take α < 0, so that we have potential wells rather than barriers. In the following, we aim to solve the time-independent Schrödinger equation 2m r (a) First consider the case where the energy E 0. Write down the general solution for ψ(z) within the interval 0 < r < a, and use the...
[Finite potential well] Consider a symmetric square well potential of a finite depth, i.e., V(x) =...
[Finite potential well] Consider a symmetric square well potential of a finite depth, i.e., V(x) = 0 inside the well, V(x) = V outside the well. NOTE: for a general discontinuous potential the boundary conditions are the continuity of both the wave function and its first derivative at the point(s) of the discontinuity of the potential y (x_)=y(x),y'(x_)=y'(x4) (i) What are the functional forms of the solutions for y(x) inside and outside the well? (ii) What are the explicit continuity...
1 Particle in a Box with a Bump (based on B&J 4.11) Consider a particle of...
1 Particle in a Box with a Bump (based on B&J 4.11) Consider a particle of mass m in a 1-D double well with potential given by Vo, 05\x\<b V(x) = { 0, b<\x<c 100, [x]>c . We will study the lowest energy states, for which 0 <E<V, corresponding to tunnelling between the two wells. (a) Write down the time-independent Schödinger equation in the three regions -c<x<-b, –b< <b, and b< I< c. Write down the most general wavefunction solution...
8. The time independent Schrödinger equation (TISE) in one-dimension where m is the mass of the...
8. The time independent Schrödinger equation (TISE) in one-dimension where m is the mass of the particle, E ita energy, (z) the potential (a) Consider a particle moving in a constant pote E> Vo, show that the following wave function is a solution of the TISE and determine the relationahip betwoen E an zero inside the well, ie. V(2)a 0foros L, and is infinite ou , ie, V(x)-w (4) Assuming (b) Consider an infinite square well with walls at 1-0...
Consider the 1D square potential energy well shown below. A particle of mass m is about to be tra...
Consider the 1D square potential energy well shown below. A particle of mass m is about to be trapped in it. a) (15 points) Start with an expression for this potential energy and solve the Schrödinger 2. wave equation to get expressions for(x) for this particle in each region. (10 points) Apply the necessary boundary conditions to your expressions to determine an equation that, when solved for E, gives you the allowed energy levels for bound states of this particle....
3. This problem relates to the bound states of a finite-depth square well potential illustrated in Fig. 3. A set of solutions illustrated in Fig. 4, which plots the two sides of the trancendental equation, the solutions to which give the bound state wave functions and energies. In answering this problem, refer to the notation we used in class and that on the formula sheet. Two curves are plotted that represent different depths of the potential well, Voi and Vo2...
1. An electron in a finite well An electron is in a finite square well that is 20 eV deep and 0.25 nm wide. You may use all results from class/textbook without re-deriving therm A. (2 pts) By graphing both sides of the quantization condition like we did in class, determine how many bound energy eigenstates exist for this well. Don't forget that there are two quantization conditions, one for the even solutions, and one for the odd solutions! B....
1. A particle of mass m moves in the one-dimensional potential: x<-a/2 x>a/2 Sketch the potential. Sketch what the wave functions would look like for α = 0 for the ground state and the 1st excited state. Write down a formula for all of the bound state energies for α = 0 (no derivation necessary). a) b) Break up the x axis into regions where the Schrödinger equation is easy to solve. Guess solutions in these regions and plug them...
The Finite Square Wel A more realistic version of the infinite square well potential has a finite well depth: -a V(x)--V for -a<x <a for x <-a,'r > a =0 This assignment will consider the bound states of a particle (of mass m) in this potential (i.e. total energy E <0). (1) Determine the general solutions to the time-independent Schrödinger equation for the three regions x <-a, -a<x <a, and > a. Write these solutions in terms of k and...
Consider a particle of mass in a 10 finite potential well of height V. the domain – a < x < a. a) Show that solutions for – a < x < a take the form on (x) = A cos(knx) for odd n, and on (x) = A sin(knx) for even n. . Show a) Match the boundary conditions at x = a to prove that cos(ka) = Bk where k is the wave vector for -a < x...
Consider the Kronig-Penney model discussed in the lectures, where the periodic potential corresponds to an array of delta functions: However, unlike the usual model, we will take α < 0, so that we have potential wells rather than barriers. In the following, we aim to solve the time-independent Schrödinger equation 2m r (a) First consider the case where the energy E 0. Write down the general solution for ψ(z) within the interval 0 < r < a, and use the...
[Finite potential well] Consider a symmetric square well potential of a finite depth, i.e., V(x) = 0 inside the well, V(x) = V outside the well. NOTE: for a general discontinuous potential the boundary conditions are the continuity of both the wave function and its first derivative at the point(s) of the discontinuity of the potential y (x_)=y(x),y'(x_)=y'(x4) (i) What are the functional forms of the solutions for y(x) inside and outside the well? (ii) What are the explicit continuity...
1 Particle in a Box with a Bump (based on B&J 4.11) Consider a particle of mass m in a 1-D double well with potential given by Vo, 05\x\<b V(x) = { 0, b<\x<c 100, [x]>c . We will study the lowest energy states, for which 0 <E<V, corresponding to tunnelling between the two wells. (a) Write down the time-independent Schödinger equation in the three regions -c<x<-b, –b< <b, and b< I< c. Write down the most general wavefunction solution...
8. The time independent Schrödinger equation (TISE) in one-dimension where m is the mass of the particle, E ita energy, (z) the potential (a) Consider a particle moving in a constant pote E> Vo, show that the following wave function is a solution of the TISE and determine the relationahip betwoen E an zero inside the well, ie. V(2)a 0foros L, and is infinite ou , ie, V(x)-w (4) Assuming (b) Consider an infinite square well with walls at 1-0...
Consider the 1D square potential energy well shown below. A particle of mass m is about to be trapped in it. a) (15 points) Start with an expression for this potential energy and solve the Schrödinger 2. wave equation to get expressions for(x) for this particle in each region. (10 points) Apply the necessary boundary conditions to your expressions to determine an equation that, when solved for E, gives you the allowed energy levels for bound states of this particle....
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