Non-Markovian Processes and Complex
We have published a paper on "Rate Operator Unraveling for Open Quantum System Dynamics" in Physical Review Letters.
The result consists of a general quantum jump method to treat open system dynamics.
Henri Lyyra has obtained the degree of PhD and has defended the thesis with prof. Lorenzo Maccone (University of Pavia) as opponent.
The thesis of Henri was entitled "Controlling Dynamics of Open Quantum Systems".
The group thanks Henri for his excellent work and wishes him all the best for the continuation of his career at University of Jyvaskyla, Finland, where he started as a postdoc this month.
Johannes Nokkala has obtained the degree of PhD and has defended the thesis with prof. Sougato Bose (University College, London) as opponent.
The thesis of Johannes entitled "Quantum Complex Networks" was accepted with honours.
The group congratulates Johannes for this achievement and wishes him all the best for the continuation of his career at IFISC, Mallorca, Spain, where he started as a postdoc this month.
We welcome Dr Arzu Kurt as a new postdoc, Prof. Weiwen Chen as a long-term visitor for 2018-2019, and MSc Olli Siltanen as a new PhD student for our group.
We have published a paper - in collaboration with USTC - on "Experimental implementation of fully controlled dephasing dynamics and synthetic spectral densities" in Nature Communications. For the open access paper, see here. For associated news articles, see, e.g., the one in phys.org
We have published a paper on "Long-term ecology of investors in a financial market" in Palgrave Communications. This is a joint work with the group of Rosario N. Mantegna in the University of Palermo and the original open access article
is here. For the press release by University of Turku, in
Finnish see here and in
English see here.
The course on Network Theory (TFYS7025) lectured by Jyrki Piilo begins on Wednesday 10 January.
Antti Karlsson has obtained the degree of PhD and has defended the thesis with prof. Dariusz Chruscinski (Nicolaus Copernicus University, Torun, Poland) as opponent.
Antti's thesis entitled "Memory effects and geometrical considerations in open quantum systems" was accepted with honours.
The group congratulates Antti for this achievement and wishes him all the best for the continuation of his career at Auria Biobank.
Colloquium article in Reviews of Modern Physics on non-Markovian quantum dynamics published. For the paper, see
here, and for news coverage in Tekniikka & Talous (in Finnish), see here.
Fabrizio Lillo (Scuola Normale Superiore, Pisa, and Santa Fe Institute, USA) visited the group 17-21 April.
For JPhys+, IOP's physics blog, feature interview with Jyrki Piilo on quantum memory and quantum systems,
Jean-Michel Raimond (Universite Pierre et Marie Curie, Paris) visited the group 4-6 April.
Chuan-Feng Li and Bi-Heng Liu from USTC, Hefei, visited the group 10-14 March.
Henri Lyyra completed the MSc degree with excellent grades and started as a PhD student in the group.
- 15.1.2015 (updated 17.3.2015):
Kimmo Luoma defended his PhD thesis on 10th January 2015 with prof. Walter Strunz (Technical University, Dresden, Germany) as opponent.
Kimmo's thesis entitled "Stochastic descriptions and memory effects in open system dynamics" was accepted with honours.
The group congratulates Kimmo for this achievement and wishes him all the best for the continuation of his career at TU (Dresden).
- 21.8.2014 (updated 29.8.2014):
We have published a paper in Quantitative Finance how news affects the trading behaviour of investors in a financial market.
This is a joint work with Rosario Mantegna (CEU, Budapest), Fabrizio Lillo (SNS, Pisa, and the Santa Fe Institute), S. Miccichè (Univ. of Palermo) and Michele Tumminello (Univ. of Palermo). For more information, see Quantitative Finance online.
For a press release by the University of Turku, see here (in Finnish), and for a web article in Talouselama (weekly Finnish economics magazine), see here .
Johannes Nokkala has started as a PhD student in the group. We do welcome Johannes into the world of open quantum systems and networks.
We have been awarded a project grant (6 000 eur) by Jenny and Antti Wihuri Foundation for 2014.
Elsi-Mari Laine defended her PhD thesis on 13th September 2013 with prof. Matteo Paris (Univ. of Milan, Italy) as opponent. Elsi's thesis titled "Memory effects in the dynamics of open quantum systems" was accepted with honours (fourteen published papers during the PhD studies, six included in the thesis). The group congratulates Elsi for the achievement and wishes her all the best for the continuation of her career at Aalto University, Finland.
The national radio broadcaster YLE1 run in its weekly science programme Tiedeykkonen a story about our recent results with Michele Tumminello,
Fabrizio Lillo, and Rosario Mantegna on the network of real world investors. To listen to the programme (in finnish), click
here. The original scientific article is here and the earlier news story at Phys.Org is
EPL (Europhysics Letters) Highlights of 2012 contain six papers in Quantum Mechanics, Mathematical Methods and Statistical Physics section.
One of them is J.-S. Tang et al., EPL 97, 10002 (2012). This is an experiment on non-Markovian quantum dynamics performed in the lab of Chuan-Feng Li (USTC, Hefei, China) with our theoretical backup together with H.-P. Breuer (Univ. of Freiburg). For more information, see here, or for a pdf-booklet of the selection, see here.
We have published a paper on "Quantitative analysis of gender stereotypes and information aggregation in a national election", PLoS One 8, e58910 (2013). The study is based on the responses that the candidates and elected provided in a questionnaire by Helsingin Sanomat for the Finnish 2011 parliament elections.
This is a joint work with Michele Tumminello (Univ. of Palermo and Carnegie Mellon University, USA), Salvatore Micciche (Univ. of Palermo), and Rosario N. Mantegna (Univ. of Palermo and Central European University, Budapest). For a popular science article about the results of the study in an italian newspaper Il Sole 24 Ore (national daily newspaper), see here (in italian), and for the original research paper in PLoS One, see here.
LabTalk article in Journal of Physics B highlighting memory effects and non-Markovian traits is here .
Antti Karlsson has started as a PhD student of the group. He received his MSc degree from the University of Waterloo, Canada, and we do welcome Antti on board.
Nature Photonics reports on CEWQO 2012 here (including recent developments in non-Markovianity).
We have published a paper on nonlocal memory effects in the dynamics of open quantum systems in Physical Review Letters (E.-M. Laine et
al., Phys. Rev. Lett. 108, 210402 (2012)). This work was done in collaboration with researchers from the University of Freiburg, Germany and USTC, Hefei, China. For more information, see Physical Review Letters online
- 23.1.2012 (updated 30.1.2012):
We have published a paper on the identification of clusters of investors based on their real trading activity. This is a joint work with Rosario Mantegna (Univ. of Palermo), Fabrizio Lillo (SNS, Pisa, and the Santa Fe Institute), and Michele Tumminello (Carnegie Mellon University). For more information, see New Journal of Physics online or a news article at PhysOrg.
We were awarded a grant (10 000 eur) by the Academy of Finland for the mobility from Finland. This is in particular for our collaboration with the University of Freiburg on non-Markovian quantum dynamics.
We were awarded a project grant (12 000 eur) by Jenny and Antti Wihuri Foundation, and Kimmo Luoma has received a PhD study grant (23 000 eur) by
the Finnish Academy of Science and Letters - Väisälä Foundation for 2012.
- 12.9.2011 (updated 2.12.2011):
We have published a paper in Nature Physics on controlling the transition from Markovian to non-Markovian quantum dynamics.
The experiment with single photons was done at the USTC, Hefei, China by the group of C.-F. Li and G.-C. Guo with our theoretical support together with H.-P. Breuer from Freiburg. For more information, see Nature Physics online. The associated News and Views article is here.
Recent public outreach Quantum Circus shows have been a success. The project was collaboration between two groups from the Turku Centre for Quantum Physics and the Turku Arts Academy. In particular from our group, Elsi-Mari Laine contributed to the script and acting on stage (a physicist, of course...).
For more information see here and here.
In collaboration with Rosario Mantegna's research group at the Observatory of Complex Systems, Palermo, and
researchers from the Santa Fe Institute, and Carnegie Mellon University, we have developed a method to construct statistically validated networks for complex systems, see PLoS ONE
International Science Day Turku 2011 on 5th June (Haroche, Enqvist, Quantum Thief, ...) website is now online and the Facebook site
Kimmo Luoma was awarded a PhD study grant (21 000 eur) for 2011 by the Finnish Academy of Science and Letters - Väisälä Foundation. Congratulations!
Kari Härkönen defended his PhD thesis on 27th November 2010 with prof. Andreas Buchleitner (Univ. of Freiburg, Germany) as opponent. Kari's thesis titled "Studies on The Multifaceted Interaction of Atoms and an Electromagnetic Field" was accepted with honours. The group congratulates Kari for the achievement and wishes him all the best for the continuation of his career at the Max Planck Institute for the Physics of Complex Systems (Dresden).
Laura Mazzola defended her PhD thesis on 13th November 2010 with prof. Massimo Palma (Univ. of Palermo, Italy) as opponent. Laura's thesis titled "Non-Markovianity and Quantum Correlations in Qubit Systems" was accepted with honours, complimenti! We wish Laura all the best for her promising scientific career.
Laura Mazzola together with her PhD supervisors Sabrina Maniscalco
and Jyrki Piilo has published an article in Physical Review
Letters on "Sudden transition between classical and quantum
decoherence". The results have also been reported in PhysOrg, and the
corresponding experimental results by a group at the University of
Science and Technology of China were reported in Nature
Kimmo Luoma has obtained MSc degree and starts as a graduate student
of the group.
Elsi-Mari Laine was awarded a 4000 eur travel grant by the Emil
Elsi-Mari Laine was awarded a 4-year PhD study position by the
National Graduate School of Modern Optics and Photonics.
Jyrki Piilo was awarded a 6000 eur travel and research expenses grant
by the Finnish Academy of Science and Letters/Vaisala Foundation for
the econophysics project.
Our results with Heinz-Peter Breuer on a measure for non-Markovianity
has been published in Physical
Review Letters. The paper was also chosen as "Editors'
Suggestion" and is highlighted in Physics.
- 2.9.2009 (updated 17.11.2009):
Our recently developed non-Markovian quantum jump method [Phys. Rev. Lett. 100,
180402 (2008)] was used by a research group at the Harvard
University to simulate energy transfer in photosynthetic complexes
and in green sulphur bacteria Chlorobium tepidum (P. Rebentrost,
R. Chakraborty, and A. Aspuru-Guzik, Journal of Chemical
Physics 131, 184102 (2009), preprint arXiv:0908.1961
The course on Econophysics (UFYS3068) lectured by Jyrki Piilo begins
on Thu 24.9.2009
The initiation of the Turku
Centre for Quantum Physics in August 2009. We are one of the five
groups forming the Center. The group website online.