Consider a spin 1/2 particle placed in a magnetic field Bo with components 3. 0 0
Pauli paramagnetism Consider an ideal spin-1/2 Fermi gas in the presence of an external magnetic field B. - B, where i is the intrinsic magnetic The energy of the particle is given by moment of the particle and m is its mass. At zero temperature, 2m (a) Find the net magnetic moment acquired by the gas. (b) Find the low-field susceptibility per unit volume of the gas. Pauli paramagnetism Consider an ideal spin-1/2 Fermi gas in the presence of an...
2. (25 points). Rabi oscillations. Consider a spin-1/2 particle in a magnetic field B - Bo2 such that the spin eigenstates are split in energy by hwo (let's label the ground state |0) and the excited state |1)). The Hamiltonian for the system is written as hwo Zeeman - _ here and below. ơng,z are the usual Pauli matrices. A second, oscillating field is applied in the transverse plane, giving rise to a time-dependent term in the Hamiltoniain hw Rabi-...
Compare the following patters for a hydrogen atom which placed in a magnetic field which is very strong compared to its internal field, its orbital and spin magnetic moments precess independently about the external field, and its energy depends on the quantum numbers mi and m, which specify their components along the external field direction the pattern of split levels originating from the level, enumerating the quantum numbers of each component of the pattern is me = 0, m, =-1/2...
Problem 2. (20 points) Consider a spin-1/2 particle with gyromagnetic ratio γ in a magnetic field B- Bi+B,k . (a) Treating Bi as a perturbation, (i) (6 points) calculate the first-order and second-order shift in energy and (ii) (4 points) calculate the first-order energy shift in wave function for the ground state. (b) (10 points) Solve the energy eigenvalue problem exactly, and compare the exact answers expended to the corresponding orders. Problem 2. (20 points) Consider a spin-1/2 particle with...
Problem 111.3. A spin 1/2 particle interacts with a nnagnetic field B = Boe through the Pauli interaction H-μσ. B where μ is the magnetic moment. The Pauli spin matrices are İ-(Oz,@yMwwhere the σί are T0 1 0-il The eigenstates for d, are the spinors 0 (a) (3 pts.) Suppose that at time t-0 the particle is in an eigenstate Xx corresponding to spin pointing along the positive z-axis. Find the eigenstatexz in terms of α and β. (b) (7...
Consider the state of a spin-1/2 particle 14) = v1o (31+z) + i] – z)) where | z) are the eigenstates of the operator of the spin z-component $z. 1. Show that [V) is properly normalized, i.e. (W14) = 1. 2. Calculate the probability that a measurement of $x = 6x yields 3. Calculate the expectation value (Šx) for the state 14) and its dispersion ASx = V(@z) – ($()2. 4. Assume that the spin is placed in the magnetic...
qm 2019.3 3. The Hamiltonian corresponding to the magnetic interaction of a spin 1/2 particle with charge e and mass m in a magnetic field B is À eB B. Ŝ, m where Ŝ are the spin angular momentum operators. You should make use of expres- sions for the spin operators that are given at the end of the question. (i) Write down the energy eigenvalue equation for this particle in a field directed along the y axis, i.e. B...
A charged particle is placed in a magnetic field. If the charged particle is at rest, will it experience a force due to the magnetic field? Explain why or why not.
Consider one dimensional lattice of N particles having a spin of 1 /2 with an associated magnetic moment μ The spins are kept in a magnetic field with magnetic induction B along the z direction. The spin can point either up, t, or down, , relative to the z axis. The energy of particle with spin down is e B and that of particle with spin up is ε--B. We assume that the system is isolated from. its environment so...
1. Consider a spin-0 particle of mass m and charge q moving in a symmetric three-dimensional harmonic oscillator potential with natural frequency W.Att-0 an external magnetic field is turned on which is uniform in space but oscillates with temporal frequency W as follows. E(t)-Bo sin(at) At time t>0, the perturbation is turned off. Assuming that the system starts off at t-0 in the ground state, apply time-dependent perturbation theory to estimate the probability that the system ends up in an...