Ladies and Gentlemen. Due to the coronavirus epidemic in Poland, the CTP PAS is operating in a limited way. In particular, until further notice the secretariat and the accountancy of the CTP PAS will be working only remotely. Contact with the administration is possible only by an e-mail. We are sorry for any inconvenience.

Seminar details

Name Quantum Information and Quantum Computing working group
Title Out-of-time-ordered correlation functions in open systems
Recent theoretical and experimental studies have shown significance of quantum information scrambling for problems encountered in high-energy physics, quantum information, and condensed matter. Due to complexity of quantum many-body systems it is plausible that new developments in this field will be achieved by experimental explorations. Therefore, a better theoretical understanding of quantum information scrambling in systems affected by noise is needed. To address this problem I will discuss indicators of quantum scrambling - out-of-time-ordered correlation functions (OTOCs) in open quantum systems. As most experimental protocols for measuring OTOCs are based on backward time evolution, two possible scenarios of joint system-environment dynamics reversal will be considered. Derivation of general formulas for OTOCs in those cases as well as a study of the spin chain model coupled to the environment of harmonic oscillators will be presented. 

The talk will be based on the paper: 
J. Tuziemski, Phys. Rev. A 100, 062106  (2019)

Zoom meeting details

Topic: Quantum Information and Quantum Computing Working Group

Time: May 21, 2020, 04:00 PM Warsaw

Join Zoom Meeting:

Meeting ID: 640 279 690
Password: tp4C,;kERx

If you encounter any problems with connecting to the Zoom meeting, please email directly.

Time Thursday, 21 May 2020, at 16:00 CEST The seminar was held!

Jan Tuziemski  (Stockholm University & Nordita)

Seminar Language English
Organisers Michał Oszmaniec; Filip Maciejewski;