Quantum Optics
Collegejaar:  20182019 

Studiegidsnummer:  4403QOPT6 
Docent(en): 

Voertaal:  Engels 
Blackboard:  Ja 
EC:  6 
Niveau:  400 
Periode:  Semester 2 
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Admission Requirements
B.Sc. level Quantum Mechanics and mathematics. The lecturer assumes that the students are familiar with the content of Quantum Theory.
Description
The quantum optics course describes the interaction between light and matter at the fundamental quantum level. This is done via second quantization where both the atom and the electromagnetic field becomes quantized. This is a minimal requirement to build an understanding of lightmatter interaction and is necessary to describe, control, manipulate and detect simple quantum systems. Throughout the course these quantum system are either comprised of light (photons) or are created by coupling a single atom to a quantized light field.
Many interesting and highly relevant questions can be addressed within the framework of quantum optics because the calculations are relatively simple compared to a more complete description of quantum field theory. This makes quantum optics ideally suited to design experiments that test the foundations of quantum mechanics and that probe the crossover between the microscopic realm of quantum physics to the macroscopic domain of classical physics. The course investigates this crossover by analyzing Schrödinger cat states and their decoherence in quantum phase space.
Throughout the course a strong link is made between theoretical concepts and modern experimental research by discussing the important experiments using scientific articles. Key historical papers are given as background, while the students present a relevant article in small groups. The discussion of these experiments help to illustrate and understand the essential difference between the classical and quantum mechanical description.
The course covers the following subjects and topics:
Basics: quantization of the electromagnetic field, field quadratures, quantum measurement, operator ordering theorems
States of light: Coherent States of Light, Thermal light states, Photon Number states, Quantum Phase space distributions, Wigner functions, quantum phase operator
Sources of quantum light: Squeezing operator, squeezed light, parametric downconversion, single photon sources
Correlation functions: Quantum and classical coherence, HanburyBrown and Twiss experiment
Quantum interference: quantum description of beamsplitters as unitary transformations, HongOuMandel effect, interferometers, homodyne detection, backaction and noise, quantum erasure
Coupled quantum oscillators: JaynesCummings model and dressedstates picture of strongly coupled systems, optomechanical interaction
Cavity QED: Single Rydberg atoms, Purcell effect, Schrödinger cat states, decoherence and quantum jumps
Applications of entanglement: Experiments on teleportation, quantum key distribution and violations of Bell’s inequality
Course objectives
At the end of the course you will be able to:
 Apply the formalism of creation and annihilation operators for the electromagnetic field to describe quantum states of light
 Name the different quasiprobability distributions and use these to draw a phasespace picture of the various quantum states of light
 Calculate and explain the fluctuations and correlations of different quantum states of light
 Calculate the photon number distribution of different quantum states of light from the Hamiltonian that describes the interaction that generates the state
 Compute and interpret the secondorder correlation function of states of light and indicate the boundary between classical and quantum light
 Explain Bell’s theorem and experimental tests done with entangled photons
 Explain and calculate the contribution of quantum fluctuations in measurements involving light
 Formulate decoherence of quantum states using the quantumjump method
 Calculate and explain the Eigenstates of the JaynesCummings Hamiltonian in the dressedstate picture
 Explain the concept of Schrödinger cat states and name several different ways of creating such macroscopic quantum states
 Describe and calculate the properties of squeezed states
 Explain the HongOuMandel effect as quantum interference related to whichpathinformation
 Calculate the visibility of quantum interference effects
 Explain the quantum erasure effect and the role of whichpath information
 Give operator expressions for the quantum optical output of arbitrary multiports and interferometers using the inputoutput formalism (smatrix) of beamsplitters
 Explain and design simple setups used to prepare and manipulate the quantum state of an atomic qubit using the interaction of the Rabimodel
 Verify if a given quantum state is pure or mixed and if the quantum state is entangled or not
 Describe how entanglement can be generated and tested in experiments that involve spontaneous parametric downconversion or atomic cascades
The following soft skills will be trained during the course:
 Presentation skills by giving a short (~10 min.) presentation about a relevant recent article in the field of experimental quantum optics
 Collaboration by preparing the presentation by a small group of 23 students
Timetable
Mode of instruction
Lectures, tutorials (exercise classes) and 15 min. student presentations on an experimental research article selected by the lecturer.
Assessment method
Student presentations are graded for each group based on the presentation and questions asked. The grade counts as 1/3 of the final grade.
Written examination, with questions modeled after the exercises from the tutorials. The written exams counts as 2/3 of the final grade.
There is a possibility to retake the exam. The date and format (oral or written examination) of the retake will be decided in consultation.
Blackboard
Blackboard is used to distribute Course information
To have access to Blackboard you need a ULCNaccount.Blackboard UL
Literature
C. Gerry and P. Knight, Introductory Quantum Optics, Cambridge University Press, Cambridge, UK (2005), ISBN 0 521 52735 X (paperback)
Lecture notes and papers distributed via balckboard
Suggested additional reading for a more experimental perspective: M.Fox, Quantum Optics: An Introduction, Oxford University Press, Oxford, UK (2001), ISBN 0198566735 (paperback)
s courses at the undergraduate (BSc) level
Contact information:
Lecturer: Dr. M. de Dood (Michiel)
Maakt deel uit van  Soort opleiding  Semester  Blok 

Physics: Research in Physics, Quantum Matter and Optics  Master  
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