ExoticPhases4QIT

   http://www.logotyp.pwr.wroc.pl/img/Graph/ZnakPWr/WersjaPionowa/pion-en.png

 

Funding scheme:

7th Framework Programme of the European Union (7FP EU)
Support for Training and Career Development of Researchers (Marie Curie)
Career Integration Grant (CGI)

Call identifier:

            FP7-PEOPLE-2011-CIG

Title:

Exotic quantum phases in graphene and other modern nanomaterials
– physical foundation for quantum information technology

Acronym:

            ExoticPhases4QIT

Grant agreement:

            PCIG09-GA-2011-294186

Duration:

            48 months (1 Sep 2011 – 31 Aug 2015)

Host:

            Wroclaw University of Technology
            Faculty of Fundamental Problems in Technology
            Institute of Physics

Supervisor:

            Prof. Jan Misiewicz, Head of Institute

Researcher:

            Prof. Arkadiusz Wójs (arkadiusz.wojs@pwr.edu.pl)

Abstract:

Project covers theoretical/computational studies of exotic phases of quantum matter (especially with fractional and non-Abelian quantum statistics)  in graphene and other modern nanomaterials. It is aimed at both fundamental effects and application in future graphene nanotechnology (especially in quantum information technology, via the concept of topological quantum computation). Major goals are: (i) implementing powerful computational methods acquired during the preceding IEF (large scale configuration interaction, quantum Monte Carlo, density functional theory) for application in modelling electronic structure and many-body effects in nanostructures; (ii) understanding new many-body effects in low-dimensional systems (especially those related to emergence of exotic electronic phases), applicable in quantum information technology; (iii) building a research group focused on nanoscience/nanotechnology, benefitting from collaboration with University of Cambridge established during the IEF.

Project’s success relies on Applicant’s experience (mostly in fundamental research, but also in teaching and leadership), previous and gained during the preceding IEF, and on superb quality of research groups with whom collaboration has been established during the IEF (Cambridge, Oxford, Penn State).

The main results will be: (i) improved understanding of the studied phenomena; (ii) shared collaboration between group at host institution (WrUT) and host of previous IEF (Cambridge), including student/lecturer exchange and joint research. 

Collaboration:

Gunnar Möller and Nigel R. Cooper (University of Cambridge, UK)

Jainendra K. Jain (Pennsylvania State University, USA)

Pawel Hawrylak (National Research Council, Canada)

Leszek Bryja (Wroclaw University of Technology)

Manfred Bayer and Dmitri Yakovlev (Technical University of Dortmund, Germany)

Ganesh Jaya Sreejith (NORDITA, Sweden)

Csaba Tőke (University of Pécs, Hungary)

Sudhansu Sekhar Mandal (Indian Association for the Cultivation of Science)

Marek Potemski (French National High Magnetic Field Laboratory of Grenoble, France)

Paulina Plochocka (French National High Magnetic Field Laboratory of Toulouse, France)

Devrim Güçlü (Izmir Institute of Technology, Turkey)

Dirk Reuter and Andreas D. Wieck (Ruhr Universität Bochum, Germany)

Major accomplishments:

Theory of magnetism in few-electron triangular graphene nanoislands

Multi-partite composite fermion description of certain fractional quantum Hall states

Identification of composite fermion pairing in fractional quantum Hall state 3/8

Numerical demonstration of adiabatic continuity between fractional quantum Hall states 1/3 and 7/3

Experimental demonstration and understanding of combined cyclotron-exciton processes in quantum wells

Research group:

Pawel Potasz, PhD (pawel.potasz@pwr.edu.pl)

Błażej Jaworowski, MSc

Anna Piekarska, MSc (now at INTiBS PAN Wrocław)

Ludmiła Szulakowska, MSc (now at University of Ottawa)

Paweł Bugajny, MSc

Maciej Bieniek, MSc

Marta Brzezińska, MSc

Bartosz Kuśmierz, MSc

Marcin Wcisło, MSc

Publications:

No.

Authors

Title

Journal

Impact
factor

1

A. Wójs, G. J. Sreejith, G. Möller, C. Tőke, and J. K. Jain

Composite fermion description of the excitations of the paired Pfaffian fractional quantum Hall state

Acta Physica Polonica A
120, 830 (2011)

0.531

2

G. J. Sreejith, C. Tőke, A. Wójs, and J. K. Jain

Bipartite composite fermion states

Physical Review Letters
107, 086806
(2011)

7.943

3

G. J. Sreejith, A. Wójs, and J. K. Jain

Unpaired composite fermion, topological exciton, and zero mode

Physical Review Letters
107, 136802 (2011)

7.943

4

P. Potasz, A. D. Güçlü, A. Wójs, and P. Hawrylak

Electronic properties of gated triangular graphene quantum dots: Magnetism, correlations, and geometrical effects

Physical Review B
85, 075431
(2012)

3.767

5

S. Mukherjee, S. S. Mandal, A. Wójs, and J. K. Jain

Possible Anti-Pfaffian Pairing of Composite Fermions at ν=3/8

Physical Review Letters
109, 256801
(2012)

7.943

6

J. Jadczak, L. Bryja, A. Wójs, and M. Potemski

Optically induced charge conversion of coexistent free and bound excitonic complexes in two-beam magneto-photoluminescence of two-dimensional quantum structures

Physical Review B
85, 195108
(2012)

3.767

7

L. Bryja, J. Jadczak, A. Wójs, G. Bartsch, D. R. Yakovlev, M. Bayer, P. Plochocka, M. Potemski, D. Reuter, and A. D. Wieck

Cyclotron-resonant exciton transfer between the nearly free and strongly localized radiative states of a two-dimensional hole gas in a high magnetic field

Physical Review B
85, 165308
(2012)

3.767

8

A. C. Balram, Y.-H. Wu, G. J. Sreejith, A. Wójs, and J. K. Jain

Role of exciton screening in the 7/3 fractional quantum Hall effect

Physical Review Letters
110, 186801
(2013)

7.943

9

A. C. Balram, A. Wójs, and J. K. Jain

State counting for excited bands of the fractional quantum Hall effect: Exclusion rules for bound excitons

Physical Review B
88, 205312
(2013)

3.767

10

G. J. Sreejith, Y.-H. Wu, A. Wójs, and J. K. Jain

Tripartite composite fermion states

Physical Review B
87, 245125
(2013)

3.767

11

J. Jadczak, L. Bryja, J. Misiewicz, A. Wójs, M. Potemski, F. Liu, D. R. Yakovlev, M. Bayer, D. Reuter, A. D. Wieck, C. A. Nicoll, I. Farrer, D. A. Ritchie

Charge conversion of nearly free and impurity bound magneto-trions immersed in 2D electron or hole gas with optically tunable concentration

Journal of Physics: Conference Series 456, 012017 (2013)

0.000

12

S. Mukherjee, S. S. Mandal, Y.-H. Wu, A. Wójs, J. K. Jain

Enigmatic 4/11 state: A prototype for unconventional fractional quantum Hall effect

Physical Review Letters 112, 016801 (2014)

7.943

13

Y. Liu, S. Hasdemir, A. Wójs , J. K. Jain, L. N. Pfeiffer, K. W. West, K. W. Baldwin, M. Shayegan

Spin polarization of composite fermions and particle-hole symmetry breaking

Physical Review B
90, 085301
(2014)

3.767

14

A. C. Balram, C. Tőke, A. Wójs, J. K. Jain

Phase diagram of fractional quantum Hall effect of composite fermions in multicomponent systems

Physical Review B
91, 045109
(2015)

3.767

15

A. C. Balram, C. Tőke, A. Wójs, J. K. Jain

Fractional quantum Hall effect in graphene: Quantitative comparison between theory and experiment

Physical Review B
92, 075410
(2015)

3.767

 

Invited talks:

No.

Authors

Title

Conference

Place

Dates

1

A. Wójs

Bi-partite composite fermion model for the 5/2 fractional quantum Hall state

Conference on Computational Physics

Gatlinburg, Tennessee, USA

30 Oct
- 3 Nov
2011

2

A. Wójs

Non-Abelian anyon statistics arising from pairing of composite fermions in fractional quantum Hall effect

XVI National Conference on Superconductivity

“Unconventional superconductivity and strongly correlated systems”

Zakopane,
Poland

7-12
Oct
2013

3

A. Wójs

On science and scientific method

9th Students’ Science Conference

Będlewo, Poland

7-9
Oct
2011

4

A. Wójs

Composite fermions and topological quantum liquids

The 11th International School on Theoretical Physics

“Symmetry and Structural Properties of Condensed Matter”

Rzeszów, Poland

1-6
Sep
2014

5

A. Wójs

Theoretical evidence for a new mechanism for FQHE at ν =4/11

International Workshop on Emerging Phenomena in Quantum Hall Systems

Weizmann Institute of Science, Rehevot, Israel

7-9
July
2014

6

A. Wójs

Emergence of non-Abelian statistics in fractional quantum Hall effect

The V Jubilee KCIK (National Quantum Information Centre) Symposium

Sopot,
Poland

22-24
May
2014

7

A. Wójs

Fractional skyrmions in quantum Hall effect

Topological Particles in Condensed Matter Physics

An Advanced School and Topical Workshop

Pune,
India

6-11
Aug
2015