Quantum Information aims at exploiting quantum mechanics to
perform certain tasks (computation, measurements, communication,
etc.) more efficiently than it is allowed by classical physics. The
course will give an introduction to quantum information as well as
to some of the physical systems where implementation of quantum
information processing is being attempted. Special attention will
be on quantum optical systems (atoms, ions, and photons)
and superconducting systems.
In the course we will be dealing with the fundamental and often paradoxical structure of quantum mechanics. By working with these subjects the participants will not only be brought up to date we a very active field of research, but will also gain a deeper understanding of quantum mechanics.
MSc Programme in Physics
After the course the students should be able to explain how the various quantum information protocols work and why they are better than any classical protocol. Furthermore the students should be able to describe how to implement quantum information protocols in practice and discuss some of the problems, which arise when one tries to do so.
More specifically the students should be able to:
- describe how the BB84 quantum cryptography protocol works and how it is implemented in practice.
- define entanglement for pure states, and describe how to use it for super dense coding, cryptography, and teleportation.
- explain how entanglement may be generated experimentally for photons, ions and atoms.
- explain what a quantum computer is and describe how the Deutsch and Grover algorithms and quantum simulation work on a quantum computer.
- discuss general requirements for practical implementation of quantum computation and describe how these requirements are fulfilled for an ion trap.
- explain the teleportation protocol and how it may be implemented experimentally.
- explain Bell's inequalities and their violation in quantum mechanics
- discuss how decoherence and imperfections appear and influence experiments and know how to describe it in terms of the density matrix.
- relate the various parts of the course together and apply the knowledge gained in the course in new situations.
After the course students should know the elementary concept from quantum information theory including qubits, pure and mixed states, Bloch sphere, entanglement, super dense coding, teleportation, quantum repeaters, Bell’s inequalities, entanglement purification, quantum error correction, and quantum computation algorithms (Deutsch, Grover, and quantum simulation). Furthermore they should know how one can implement quantum information processing in simple experimental systems such as trapped ions and super conducting qubits.
The student will learn how the different logical structure of quantum mechanics, compared to classical mechanics, enables new possibilities for e.g. computation, measurements, and communication. Thereby the course will provide a deeper understanding of the quantum mechanics learned in previous courses. It will also provide the students with a background for further studies within quantum optics or quantum information, e.g. in a M.Sc. project
Lectures and exercises
Various notes and articles.
It is assumed that you have a strong background in quantum
mechanics, e.g., through following an advanced quantum mechanics
course. It will be assumed that you have heard about the
quantization of the electromagnetic field, either in a quantum
optics course or some other course. Also it may be an advantage if
you have followed a course on Optical Physics and Lasers and on
Quantum Optics, but it is not strictly necessary.
Academic qualifications equivalent to a BSc degree is recommended.
- 7,5 ECTS
- Type of assessment
Oral examination, 30 minWithout preparation time
- Marking scale
- 7-point grading scale
- Censorship form
- No external censorship
More internal examiners
Criteria for exam assessment
see learning outcome
Single subject courses (day)
- Theory exercises
- Course number
- 7,5 ECTS
- Programme level
- Full Degree Master
- No restriction
- Study Board of Physics, Chemistry and Nanoscience
- The Niels Bohr Institute
- Faculty of Science
- Anders Søndberg Sørensen (15-6a776d6e7b7c377c787b6e777c6e7749776b7237747e376d74)
Phone 35 32 52 40, Mobile 24 66 13 77
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Courseinformation of students