Quantum Photonics and Nanomaterials

Core modules:

Solid State Physics

Covering the electronic properties of solids, this module details the classification of solids into conductors, semiconductors and insulators, the free electron model, the origin of electronic band structure, the fundamental electronic properties of conductors and semiconductors, carrier statistics, experimental techniques used to study carriers in a solid, and the classification and physics of the principal types of magnetism. A review of the application of these fundamental concepts to state of the art research in the field completes the module.

15 credits

Optical Properties of Solids

The course covers the optical physics of solid-state materials. The optical properties of insulators, semiconductors, and metals from near-infrared to ultraviolet frequencies are considered, covering both established technologies and the latest developments in photonics. The infrared properties of materials are then discussed, and the course concludes with an introduction to nonlinear crystals. The module will be taught via lectures and problem classes. 

The course first develops the classical model of absorption and refraction based on Lorentz oscillators, and then discusses the use of quantum theory to understand the absorption and emission spectra. The optical properties in state-of-the-art materials are discussed in the context of photonics research and applications. The topics covered include:

Dispersion in optical materials, including optical fibres,

Interband absorption, 

Excitons, 

Luminescence, 

Low-dimensional materials, 

Free carrier effects, 

Phonon effects, 

Nonlinear crystals.

15 credits

Semiconductor Physics and Technology

This module builds on the core solid state physics modules to provide an introduction to semiconductor electronic and opto-electronic devices and modern developments in crystal growth to produce low dimensional semiconductor structures (quantum wells, wires, dots and atomically thin two-dimensional materials). Band structure engineering, the main physical properties and a number of applications of low dimensional semiconductor structures are covered. The modules concludes with some examples of recent advances in the field, such as new epitaxial techniques and atomically thin two-dimensional materials.

15 credits

Quantum Optics and Quantum Computing

Quantum computing is introduced through the fundamental concepts of quantum gates and circuits before moving to cover more advanced topics such as quantum programming, quantum algorithms and quantum error correction. These concepts are then applied by studying how programming quantum circuits can be done using cloud computers (e.g. using openQASM format) and the implementation of quantum algorithms (including examples) and quantum error correction using stabiliser formalism and graph states and quantum error correction codes.

The second part of the module covers quantum optics and quantum optical applications at the forefront of current research in the field. This includes topics such as weak and strong coupling of dipole sources in a cavity, single photon sources, protocols of quantum optical communications and linear optics computation. The module then progresses to quantum optical applications. Cavity electrodynamics is studied in the regimes of strong and weak coupling of matter excitations to the electromagnetic field in optical microstructures. This will lead to the physics of highly efficient single photon devices necessary for linear optics quantum computation. The effects of entanglement and quantum teleportation will be also considered.

15 credits

Research Project in Physics

This is a project based module that gives students an opportunity to apply their scientific knowledge to a research problem. Students will develop skills in time management, project planning, scientific record keeping, information retrieval and analysis of scientific information sources.

Students will choose a project of relevance to their programme of study and will work closely with an academic supervisor who is an expert in the field. The project will involve analysing the literature relevant to the problem and then developing skills relevant to tackling the problem. Projects maybe experimental, theoretical, analytical or computational in nature but will involve a substantial component of new work. The research will culminate with a written dissertation.

Teaching will be through weekly supervisions with academic staff and interactions with research group members. In the supervisions students will develop research plans, practise applying the scientific method by developing and testing hypotheses, discuss findings from both the literature and from laboratory or simulation based experiments, present results and discuss potential conclusions. Plans will be adapted based on these discussions. Specific experimental and/or simulation based skills will be learnt through a combination of supervised activities and self teaching - building on basic skills learnt in earlier modules in the programme.

Weekly seminars and workshops will teach students good practice in terms of searching the literature, research ethics and keeping research records.

90 credits

Optional modules - two from:

Physics in an Enterprise Culture

This is a seminar and workshop based course where students will create a proposal for a new business. Seminars will cover topics such as innovation, intellectual property, costing and business planning. Workshops will support students to develop ideas and communicate them effectively. Both a business proposal and a pitch to investors are assessed. This modules give students an opportunity to develop a business proposal, using their physics knowledge as a starting point. The module starts with a series of seminars and workshops designed to help students come up with possible new ideas for products or services that they are interested in developing further. Further seminars formalise how business ideas are tested to ensure that basic assumptions about customers and markets are sensible and also guidance is given in terms of how to estimate the costs and revenues associated with the idea. Finally seminars to support writing the idea into a proposal are given. Evaluation of ideas using peer feedback is a key part of the module and midway through, a review panel is organised to give an opportunity for students to formally evaluate other ideas to help them develop their own.

15 credits

Further Statistical Physics

Statistical mechanics at an intermediate to advanced level, including the concepts of micro and macro states, different ensembles, and mathematical formulation of calculating average values physical quantities that can be measured in experiments. Contemporary topics such as Quantum Statistical Mechanics, Phase transitions and critical phenomena and Mean field theory will be covered.Statistical physics is a probabilistic description of systems with many degrees of freedom and provides the microscopic basis of thermodynamics. The  course focuses on understanding the ergodic hypothesis, classification of micro and macro states and calculation of thermodynamic quantities e.g., pressure, volume, free energy etc. of a system in the micro-canonical, canonical and grand canonical ensemble, quantum statistical mechanics, including Bose-Einstein and Fermi-Dirac statistics and Landau theory of phase transitions. Advanced topics such as mean field theory and critical phenomena will also be covered.

15 credits

Advanced Electrodynamics

This module gives a detailed mathematical foundation for modern electrodynamics, starting from Maxwell's equations, charge conservation and the wave equation, to gauge invariance, waveguides, cavities and antennas, and an introduction to quantum electrodynamics. After a brief recap of vector calculus, we explore the role of the scalar and vector potential, the multi-pole expansion of the field, the Poisson and Laplace equations, energy and momentum conservation of the fields, and waveguides and cavities. After a relativistic treatment of the fields we consider the quantisation of the electromagnetic field modes, the Hamiltonian for the dipole coupling between a field and a radiation emitter, and finally we explore the Aharonov-Bohm effect.

15 credits

Advanced Quantum Mechanics

Quantum mechanics at an intermediate to advanced level, including the mathematical vector space formalism, approximate methods, angular momentum, and some contemporary topics such as entanglement, density matrices and open quantum systems. We will study topics in quantum mechanics at an intermediate to advanced level, bridging the gap between the physics core and graduate level material.   The syllabus includes a formal mathematical description in the language of vector spaces; the description of the quantum state in Schrodinger and Heisenberg pictures, and using density operators to represent mixed states; approximate methods: perturbation theory,  variational method and time-dependent perturbation theory;  the theory of angular momentum and spin; the treatment of identical particles; entanglement; open quantum systems and decoherence. The problem solving will provide a lot of practice at using vector and matrix methods and operator algebra techniques. The teaching will take the form of traditional lectures plus weekly problem classes where you will be provided with support and feedback on your attempts.

15 credits

Advanced Soft Matter and Biological Physics

Fascinating behaviour of soft matter and biological systems often occurs at thermal energy scales and can be described by statistical mechanical models. In addition, living biological matter is driven out of equilibrium due to internal biochemical sources of energy. Mathematical models and modern advanced experimental techniques are revealing the physical principles underpinning the biological world and the technological possibilities of complex soft materials.Much recent progress in soft matter and biology has been made thanks to the advent of advanced experimental  techniques which we will show are based on elegant physical principles. We will also study the physical principles underpinning the behaviour of complex soft matter and biological materials. We will describe phase transitions in multiple soft matter systems by calculating free energies. We will use random walk models to describe the shape of polymer molecules and the Brownian motion of colloids. We will also study the dynamics of polymers and the kinetics of polymerisation. We will then consider how polymerisation of protein filaments and action of molecular motors can generate forces in biological cells. This will involve us introducing concepts of systems that are in equilibrium versus out of equilibrium. Using a mathematical  framework we can describe behaviour at different length scales for example from the cytoskeleton to tissues, bacteria colonies and flocking. We will also investigate how the energy required for life is captured in photosynthesis.

15 credits