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*Problem 2.27 Consider the double delta-function potential V (x) -α[6(x + a) + δ( )], x-...
Figure 3. Double delta-function potential. X +a V(x) 2. Consider the symmetric, attractive double delta function potential illustrated in Fig. 3 where α is a positive constant. There are two lengths...
Figure 3. Double delta-function potential. X +a V(x) 2. Consider the symmetric, attractive double delta function potential illustrated in Fig. 3 where α is a positive constant. There are two lengths in this problem, the separation between the delta functions, 2a, and the decay lengthK-1-쁩)" of the wave function for an attractive delta function potential. [Note: In this problem, you may not need much math, but explain clearly the reasoning for your answers.] (a) How many bound states do you...
So the solution i have so far is what i got from an online solution, but...
So the solution i have so far is what i got from an online
solution, but i still dont fully understand how to get the general
solution for this problem (the part highlighted in pink). Can
someone go into depth as to how to get the general solutions for
each of the regions.
-Lacas)5C- Problem a a7) Consider the double delta-function potential Nexo L &and a are positiNe Ca Sketch the potenttial VCx VCO= -a 8x) -a (b) How many...
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...
Potential energy function, V(x) = (1/2)mw2x2 Assuming the time-independent Schrödinger equation, show that the following wave...
Potential energy function,
V(x) = (1/2)mw2x2
Assuming the time-independent Schrödinger equation, show that the following wave functions are solutions describing the one-dimensional harmonic behaviour of a particle of mass m, where ?2-h/v/mK, and where co and ci are constants. Calculate the energies of the particle when it is in wave-functions ?0(x) and V1 (z) What is the general expression for the allowed energies En, corresponding to wave- functions Un(x), of this one-dimensional quantum oscillator? 6 the states corresponding to the...
Consider a particle in a 1-d well with potential V(x) =-U for-d < x < d,...
Consider a particle in a 1-d well with potential V(x) =-U for-d < x < d, and V(z) 0 elsewhere. We will use the variational wave function v(z) = A(b + r), t(x)-A(b-x), -b < r < 0, 0 < x < b, to show that a bound state exists for any U0. a) Normalize the wave function. Find the expectation values of the kinetic and potential energies b) Show that for sufficiently large b, with b> d, the expectation...
Problem # 5 ( 6 pts) Consider the potential: V(x) αδ(x) Where α is a positive...
Problem # 5 ( 6 pts) Consider the potential: V(x) αδ(x) Where α is a positive constant, and with E>0 Calculate the reflection and transmission coefficients.
The most general wave function of a particle in the simple harmonic oscillator potential is: V(x,...
The most general wave function of a particle in the simple harmonic oscillator potential is: V(x, t) = (x)e-1st/ where and E, are the harmonic oscillator's stationary states and their corresponding energies. (a) Show that the expectation value of position is (hint: use the results of Problem 4): (v) = A cos (wt - ) where the real constants A and o are given by: 1 2 Ae-id-1 " Entichtin Interpret this result, comparing it with the motion of a...
Please answer all parts: Consider a particle in a one-dimensional box, where the potential the potential...
Please answer all parts:
Consider a particle in a one-dimensional box, where the potential the potential V(x) = 0 for 0 < x <a and V(x) = 20 outside the box. On the system acts a perturbation Ĥ' of the form: 2a ad αδα 3 Approximation: Although the Hilbert space for this problem has infinite dimensions, you are allowed (and advised) to limit your calculations to a subspace of the lowest six states (n = 6), for the questions of...
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...
Let's consider a function described in terms of its displacement y(x,t) at t 0 by: where a, b and e are positive constants a) Write an expression for this wave profile, having a speed in the nega...
Let's consider a function described in terms of its displacement y(x,t) at t 0 by: where a, b and e are positive constants a) Write an expression for this wave profile, having a speed in the negative x-direction, as a function of position and time (b) Sketch the profile of the wave at t-0 s and t 2 s if v1 m/s (c) Determine if the following functions describe a travelling wave: (i) vr,t) (ar+ bt c), where a, b...
Figure 3. Double delta-function potential. X +a V(x) 2. Consider the symmetric, attractive double delta function potential illustrated in Fig. 3 where α is a positive constant. There are two lengths in this problem, the separation between the delta functions, 2a, and the decay lengthK-1-쁩)" of the wave function for an attractive delta function potential. [Note: In this problem, you may not need much math, but explain clearly the reasoning for your answers.] (a) How many bound states do you...
So the solution i have so far is what i got from an online
solution, but i still dont fully understand how to get the general
solution for this problem (the part highlighted in pink). Can
someone go into depth as to how to get the general solutions for
each of the regions.
-Lacas)5C- Problem a a7) Consider the double delta-function potential Nexo L &and a are positiNe Ca Sketch the potenttial VCx VCO= -a 8x) -a (b) How many...
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...
Potential energy function,
V(x) = (1/2)mw2x2
Assuming the time-independent Schrödinger equation, show that the following wave functions are solutions describing the one-dimensional harmonic behaviour of a particle of mass m, where ?2-h/v/mK, and where co and ci are constants. Calculate the energies of the particle when it is in wave-functions ?0(x) and V1 (z) What is the general expression for the allowed energies En, corresponding to wave- functions Un(x), of this one-dimensional quantum oscillator? 6 the states corresponding to the...
Consider a particle in a 1-d well with potential V(x) =-U for-d < x < d, and V(z) 0 elsewhere. We will use the variational wave function v(z) = A(b + r), t(x)-A(b-x), -b < r < 0, 0 < x < b, to show that a bound state exists for any U0. a) Normalize the wave function. Find the expectation values of the kinetic and potential energies b) Show that for sufficiently large b, with b> d, the expectation...
Problem # 5 ( 6 pts) Consider the potential: V(x) αδ(x) Where α is a positive constant, and with E>0 Calculate the reflection and transmission coefficients.
The most general wave function of a particle in the simple harmonic oscillator potential is: V(x, t) = (x)e-1st/ where and E, are the harmonic oscillator's stationary states and their corresponding energies. (a) Show that the expectation value of position is (hint: use the results of Problem 4): (v) = A cos (wt - ) where the real constants A and o are given by: 1 2 Ae-id-1 " Entichtin Interpret this result, comparing it with the motion of a...
Please answer all parts:
Consider a particle in a one-dimensional box, where the potential the potential V(x) = 0 for 0 < x <a and V(x) = 20 outside the box. On the system acts a perturbation Ĥ' of the form: 2a ad αδα 3 Approximation: Although the Hilbert space for this problem has infinite dimensions, you are allowed (and advised) to limit your calculations to a subspace of the lowest six states (n = 6), for the questions of...
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...
Let's consider a function described in terms of its displacement y(x,t) at t 0 by: where a, b and e are positive constants a) Write an expression for this wave profile, having a speed in the negative x-direction, as a function of position and time (b) Sketch the profile of the wave at t-0 s and t 2 s if v1 m/s (c) Determine if the following functions describe a travelling wave: (i) vr,t) (ar+ bt c), where a, b...
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