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.”


Hi everyone,

I wanted to publicize a paper recently published in collaboration with Prof. Fernando Semião, from UFABC, together with researchers from Belfast, Cambridge, Viena and Zürich, on the experimental reconstruction of entropy production in mesoscopic quantum systems.

The paper was published in Physical Review Letters. It was chosen as editor suggestion and also appeared on the Synopsis section of the APS website.

In this paper we applied a formalism previously developed for estimating the entropy production (a quantifier of irreversibility) in quantum systems subject to non-equilibrium baths. Using this model, we were able to reconstruct the entropy production in a Bose-Einstein condensate (from Esslinger’s group in Zürich) and in an optomechanical cavity (from Aspelmeyer’s group in Viena).

Our results offer the first experimental demonstration of the contribution of quantum fluctuations in maintaining a non-equilibrium steady-state and, consequently, producing irreversible entropy.

Gabriel T. Landi

Talk@IFUSP, friday 19/10, 3pm, by Prof. Avi Pe’er

This friday, 19/10, at Auditório Norte 3pm, Prof. Avi Pe’er from Bar Ilan University, will give a talk on

The Speed Limit of Quantum Measurement (and what we can achieve if we break it…)

Homodyne measurement is a corner-stone of quantum optics. It measures the fundamental variables of quantum electrodynamics – the quadratures of light, which constitute the optical analog of position and momentum. Yet, standard homodyne, which is used to measure quadratures, suffers from a severe bandwidth limitation: While the bandwidth of optical states can easily span many THz, standard homodyne detection is inherently limited to the electrically accessible, MHz-to-GHz range, leaving a dramatic gap between the relevant optical phenomena and the measurement capability.
We recently demonstrated a fully parallel optical homodyne measurement across an arbitrary optical bandwidth, effectively lifting the bandwidth limitation completely 1. Using optical parametric amplification, which amplifies one quadrature while attenuating the other, we could measure quadrature squeezing simultaneously across a bandwidth of 55THz.
I will review the broad context of quantum measurement and will present our parametric homodyne method and results. I will then discuss two immediate applications of parametric homodyne: First, broadband Quantum Key Distribution, where many quantum channels of communication can be multiplexed over a single broadband squeezer and using a single homodyne device. Second, Squeezing-enhanced Raman spectroscopy, where the detection sensitivity can surpass the shot-noise limit with a nonlinear interferometry scheme.

• Yaakov Shaked, Yoad Michael, Rafi Vered, Leon Bello, Michael Rosenbluh and Avi Pe’er, “Lifting the Bandwidth limit of Optical Homodyne Measurement”, Nature Comm. 9, 609 (2018)

Location: Auditório Norte, IFUSP.
Date: 19/10/2018, 15:00 hs

Mini-course on quantum optics – Cecilia Cormick

Prof. Cecilia Cormick, from Nacional University of Cordoba will teach a graduate-level mini-course on quantum optics, between 12/11 and 14/11 @ IFUSP. Topics will include cavity QED,  trapped ions and ultra-cold atoms in optical lattices.

More details will be posted soon on

Anyone interested is more than welcome to join. Students can also gain credits by enrolling in the course.