Department of Physics, Unit Catalogue 2011/12 

Credits:  6 
Level:  Masters UG & PG (FHEQ level 7) 
Period: 
Semester 2 
Assessment:  EX 100% 
Supplementary Assessment:  Likeforlike reassessment (where allowed by programme regulations) 
Requisites:  Before taking this unit you must take PH30030 
Description:  Aims: The aim of this unit is to increase the breadth and depth of students' knowledge and understanding of quantum physics, in both fundamental aspects of quantum mechanics and modern applications of quantum theory. Learning Outcomes: After taking this unit the student should be able to: * explain in detail the salient differences between classical physics and quantum physics; * demonstrate an indepth understanding of the realm of quantum optics and its major applications and frontline research; * give a mathematical description of the quantum principles of vector states, Hilbert space and quantum interference; * use and apply Dirac formalism to lightmatter optical phenomena; * explain optical absorption and refraction using a quantum framework; * outline and critically assess the following major applications of coherent lightmatter interactions; Rabi oscillations, Ramsey interference, electromagnetically induced transparency and laser cooling; * discuss the principles of quantum cryptography and computing. Skills: Numeracy T/F A, Problem Solving T/F A. Content: Relativistic quantum mechanics (7 hours): Principle of inertia, Lorentz transformation, KleinGordon equation, Dirac equation, spinors, addition of relativistic velocities, Lorentz boost of spinors, free particle solutions, interaction with the electromagnetic field, nonrelativistic limit of Dirac's equation, origin of the electron spin, spinorbit interaction, solutions of Dirac's equation for the hydrogen atom. The physics of high magnetic fields (3 hours): Landau quantization, 2D and 3D density of states in a magnetic field, Shubnikov de Haas and van Alphen effects, oscillations of the Fermi level, Quantum Hall Effect. Spin in electric and magnetic fields (2 hours): Larmor precession and 4π periodicity of the spin phase, neutron interference experiments, spin resonance, Rabi oscillations, Rashba Hamiltonian, Spin transistor, Aharonov Casher and AharonovBohm effects. Quantum optics (10 hours): Phenomenology of optical processes (e.g. absorption, emission and scattering). Quantum mechanical principles and Dirac notations. Semiclassical interaction of radiation with matter, Hamiltonian of 2level and 3level atoms in electromagnetic field. Evolution of a quantum system, Rabi oscillations and quantum interference. Applications: Electromagnetically induced transparency and coherent population trapping. Lasing without inversion. Ramsey interference. Optomechanical effect: laser cooling. Quantum Information (2 hours): Quantum cryptography and computing. 
Programme availability: 
PH40084 is Compulsory on the following programmes:Department of Physics
PH40084 is Optional on the following programmes:Programmes in Natural Sciences
