Mini course on quantum optics. Prof. Cecilia Cormick, Feb 12-14 @ IFUSP

Prof. Cecilia Cormick will be teaching a 3-day mini-course on quantum optics, light-atom interactions and trapped ions, @ IFUSP between Feb 12 and 14, 2019. Anyone interested in participating is more than welcome to join. Students from USP can also earn credits from it. For more information, see the course’s official website at:

Where: Seminar room @ Ed. Alessandro Volta, Bloco C, IFUSP.

 – Lectures Tuesday (12), Wednesday (13) and Thursday (14) from 10:00 to 13:00.
– Informal discussions in the afternoon, from 16:00 to 17:00.

Goal: The goal of the course is to give the students a general overview of standard theoretical tools in the field of quantum optics. These are to a large extent independent of the concrete physical system in mind and are essential for an understanding of several applications related with the control of quantum systems. The case of atoms interacting with light fields will be treated in more detail as a concrete implementation.

Syllabus: Interaction between atoms and the quantized electromagnetic field. Cavity QED. Wigner-Weisskopf theory of spontaneous emission. Treatment of the atom as open quantum system, Bloch equations. Optical forces on atoms: Doppler cooling, radiation pressure, optical potentials. Sub-Doppler cooling. Basic principles of ion trapping. Internal and external degrees of freedom in systems of trapped ions. Sideband cooling. Laser control of the state of the ions. Manipulation of ions for quantum computing purposes.

Previous knowledge assumed: General notions of quantum mechanics, including Dirac notation and density matrix formalism. General notions of atomic physics.

Lecture 1: General (and fast) description of atom-light interactions:

– Semiclassical treatment, weak coupling, rotating wave approximation. Two-level atom: Rabi oscillations, AC Stark shift.
– Quantized electromagnetic field, definitions without derivation.
– Interaction between atoms and quantized field: Jaynes-Cummings model, Wigner-Weisskopf theory.
– Master-equation description of spontaneous emission. Bloch equations: evolution and sta- tionary state.

Lecture 2: Optical forces on atoms:
 – Radiation pressure and Doppler cooling.
– Subdoppler cooling with Sisyphus effect.
– Magneto-optical traps.
– Atoms in optical lattices.

Lecture 3: Trapped ions:
 – Basic principles of Penning and Paul traps.
– Internal and external degrees of freedom of a single ion.
– Manipulation with lasers: sideband cooling, single-qubit gates.
– Description of a system of several ions.
– Basic elements for quantum information processing with trapped ions.

Additional topics included in the problems:
– Adiabatic elimination procedure.
– “Forbidden” transitions through two-photon processes.
– Optical pumping.

Recommended reading:
For the level of the crash-course (not necessarily the best material, rather the most acces- sible):

• M. Lukin, notes for the course “Modern Atomic and Optical Physics II” (Harvard), available at

• M. Fox, “Quantum Optics” (Oxford University Press).

• C. Gerry and P. Knight, “Introductory Quantum Optics” (Cambridge University Press).

At a more advanced level (and more reliable as reference material):

• R. Loudon, “The Quantum Theory of Light” (Oxford University Press).

• D. F. Walls and G. F. Milburn, “Quantum Optics” (Springer).

• M. Scully and M. S. Zubairy, “Quantum Optics” (Cambridge University Press).

• C. Cohen-Tannoudji, J. Dupont-Roc, and G. Grynberg, “Atom-Photon Interactions” (Wiley).

Short bio: Prof. Cecilia Cormick

I studied physics at the University of Buenos Aires, and I did my diploma thesis on phase-space representations for quantum computing, under the supervision of Juan Pablo Paz. After that I stayed in the same group for my PhD, which focused on decoherence problems from a theoretical approach. By the end I was eager to get closer to actual experiments so I moved towards quantum optics during my postdoctoral stays in Germany (first Saarbrücken with Giovanna Morigi, then Ulm in the group of Martin Plenio). There I worked mostly on the theoretical description of systems of trapped ions for quantum information and simulation purposes, but I also did some more general stuff related with spectroscopy or quantum state engineering. At the end of 2014 I returned to Argentina and settled at the University of Cordoba, where I work as tenured researcher and assistant professor. In the last years, although I haven’t abandoned my older topics, my lines of research have shifted gradually towards the area of quantum statistical mechanics, in particular to phase transitions and systems of composite bosons.

This course is funded by the graduate-program at IFUSP and is a part of an initiative to promote short courses on advanced research topics, taught by experts from other institutions in Brazil and abroad.

Congratulations Young Fellows!

The Brazilian Academy of Science (Academia Brasileira de Ciências) has just released the new members. One interesting class, created about 10 years ago, is the Affiliated Member (Membro Afiliado), which lasts for five years and focus on young promising scientists. In physics, São Paulo state has just elected five new Affiliated Members, three of them our SPN off QuBIT fellows Diogo de Oliveira Soares Pinto (USP), Gustavo Wiederhecker  (Unicamp), and  Thiago Pedro Mayer Alegre (Unicamp).

Congratulation, guys! Let us celebrate during our December Meeting.

Postdoctoral position in Quantum Information Science at the Centre for Quantum Technologies and Yale-NUS College, Singapore

A postdoctoral position in the field of Quantum Information Science is available at the Centre for Quantum Technologies (CQT), National University of Singapore, and Yale-NUS College (joint affiliation). The research focus is on theoretical studies of quantum error correction and fault tolerance, with a particular focus on applications in realistic quantum computing systems. This can include considerations for noise models relevant for current systems in the race for quantum computers, non-Markovian noise, thermodynamical analyses of noise removal procedures, etc.

The candidate should have a strong background in theoretical physics, possess numerical skills, and have an interest in understanding experimental work relevant to quantum computation. PhD work in quantum computing or quantum information related research is expected. Past experience with quantum error correction and fault tolerance, and/or the study of physical noise models will be a strong plus point.

The position commences in the first half of 2019 (negotiable), and is for two years. An extension into a third year may be possible depending on funding availability. The successful candidate will work in the group of Hui Khoon Ng, an Assistant Professor (Physics) at Yale-NUS College, and a CQT Fellow at the Centre for Quantum Technologies. The postdoc can expect many opportunities to work with graduate and undergraduate students within the group. Please refer to the group website for more information:

Interested applicants, please contact H. K. Ng directly at, with a statement of interest and a detailed curriculum vitae.

CQT ( is a National Research Centre of Excellence hosted at the National University of Singapore. The Centre comprises some 150 research staff and students, working in all areas of quantum information science. Yale-NUS College (http://www.yale-nus. is an undergraduate college, jointly founded by Yale University and the National University of Singapore, emphasizing a liberal arts and sciences education, with a commitment to building a strong research base at an early stage for science majors.

New Article in Jornal da USP

Our multitasking @gtlandi has now published an article in Jornal da USP, together with Luciana Schmidt, a Medical Doctor

It is in Portuguese, sorry for some readers, explaining some new contributions from the group of Eugene Polzik, at Niels Bohr Institute. They show how to optically measure magnetic fields with high sensitiveness and no need of cryogeny, and how this can be a viable alternative to electrocardiography (ECG), capable of noninvasive (in medical sense) monitoring of the heart of a fetus (this is the part that appeals to Luciana!).

Congratulations, Gabriel! Long life to the partnership with Luciana and with Jornal da USP.

BCG consulting firm report on business potential of quantum computing — quantum Rio

In a recent, freely available report, Boston Consulting Group (BCG), an American consulting firm, advises companies on the business potential of quantum computing over the next decade. To me, the report seems realistic and down-to-earth, avoids the all-too-common overhype, and doesn’t skip over relevant technical issues. There are also hard-to-find details on the amount of […]

via BCG consulting firm report on business potential of quantum computing — quantum Rio

PhD Positions at the Centre of Quantum Optical Technologies in Warsaw, Poland

Six PhD positions in theoretical quantum optics and quantum information science are available at the Centre for Quantum Optical Technologies (QOT) at the University of Warsaw. Successful candidates will work in a diverse environment including theorists and experimentalists on fundamental properties of quantum systems, such as quantum coherence and entanglement, and their applications in quantum technologies, such as quantum metrology, sensing, communication, and computation.

Application deadline:
26th of November 2018

Profile of the candidates:
PhD candidates should have a master degree in physics or a related area, and have a good understanding of physics, quantum theory, and quantum optics.

We offer:
The PhD projects will be performed at the Centre for Quantum Optical Technologies (QOT), hosted by the Centre of New Technologies (CeNT) of the University of Warsaw. We offer an open and friendly research environment with access to all the facilities available within the Centre of New Technologies―an interdisciplinary research institute established within the University of Warsaw to gather international researchers of different backgrounds and experience, in order to conduct state-of-the-art research in biological, chemical and physical sciences. University of Warsaw strongly values the diversity of candidates and is very committed to the equality of opportunity.
Successful candidates will work within one of the theoretical labs operating within the QOT centre, yet in close collaboration with centre’s theoretical and experimental groups, as well as other research teams specialising in quantum theory and its implementations within Warsaw’s research community:
Full details of the offer including net salary, duration and the suggested starting date:
For more information see also the links provided below.
Centre for Quantum Optical Technologies (QOT):
Centre of New Technologies (CeNT):
University of Warsaw:

Informal inquiries:
Prof. Konrad Banaszek
Quantum Technologies Lab
Potential research topics:
quantum limits of optical communication; superresolution imaging

Dr. Jan Kolodynski
Quantum Information and Inference Lab
Potential research topics:
quantum metrology and estimation; implementations of quantum information protocols; atomic quantum sensors and light-atom interfaces; signal processing and data inference tools for real-time quantum control and sensing

Dr. Alexander Streltsov
Quantum Resources and Information Lab
Potential research topics:
quantum resource theories (entanglement, coherence, thermodynamics) and their applications in quantum communication and quantum computation

Applicants should submit a motivation letter, a curriculum vitae, a research record, and academic transcript to At least one letter of reference prepared by a senior researcher familiar with their work shall be sent directly by the author to the address with the name of the candidate specified in the subject line.

To allow us to process your data, please include the following statement in your application:
“I hereby consent to have my personal data processed by the University of Warsaw with its registered office at ul. Krakowskie Przedmieście 26/28, 00-927 Warszawa for the purpose of carrying out a recruitment process and selecting an employee and concluding a contract for employment at the University of Warsaw. I have been informed of my rights and duties. I understand that provision of my personal data is voluntary.”