How to Make the Most Out of Quantum Measurements

PhD defence, Friday 25 May 2018, Jinglei Zhang

2018.05.25 | Trine Berndt Turtiainen Scheelke

Jinglei Zhang

Quantum effects can appear only in systems that are adequately isolated from their noisy environment. At the same time, it is also important to have access to the system in order to control it and perform measurements. It is therefore fundamental to develop ways to interpret the outcomes of the measurements that extract optimally information about the state of the system. In her PhD studies, Jinglei Zhang has focused on quantum systems that are monitored continuously in time. She developed the application of a generalization of the concept of quantum state, called past quantum state, to a number of experimentally relevant systems. This concept allows for better retrodiction of past measurements compared to the conventional quantum state, and it represents a way to include hindsight in the description of a quantum system. Moreover, Jinglei showed how measuring a system can give not only a full characterization of its state with reduced uncertainty but also contribute to effectively cool the system to lower temperatures.

The PhD degree was completed at the Department of Physics and Astronomy, Science and Technology, Aarhus University.

This résumé was prepared by the PhD student.

Time: Friday 25 May 2018 at 13.00
Place: Building 1523, room 318, Physics Auditorium, Department of Physics and Astronomy, Ny Munkegade 120, Aarhus University, 8000 Aarhus C
Title of PhD thesis: Quantum measurement and preparation of Gaussian states
Contact information: Jinglei Zhang, e-mail:, tel.: +45 71 57 45 44
Members of the assessment committee:
Senior lecturer Janet Anders, Physics and Astronomy, University of Exeter.
Professor Klemens Hammerer, Institute for Theoretical Physics, University of Hannover
Associate Professor Brian Julsgaard (chair), Department of Physics and Astronomy, Aarhus University
Main supervisor:
Professor Klaus Mølmer, Department of Physics and Astronomy, Aarhus University
Language: The PhD thesis will be defended in English

The defence is public.
The dissertation is available for reading at the Graduate School of Science and Technology/GSST, Ny Munkegade 120, building 1520, rooms 128-134, 8000 Aarhus C.

PhD defence
Comments on content: 
Revised 17.05.2018