#### Filter Results:

- Full text PDF available (13)

#### Publication Year

1994

2016

- This year (0)
- Last 5 years (3)
- Last 10 years (7)

#### Publication Type

#### Co-author

#### Journals and Conferences

#### Key Phrases

Learn More

This chapter is devoted to the recent theoretical results on the optical quantum control over charges confined in quantum dots under influence of phonons. We show that lattice relaxation processes lead to decoherence of the confined carrier states. The theoretical approach leading to a uniform, compact description of the phonon impact on carrier dynamics,… (More)

- Patrycja Łydżba, Lucjan Jacak, Janusz Jacak
- Scientific reports
- 2015

In this paper, the commensurability conditions, which originated from the unique topology of two-dimensional systems, are applied to determine the quantum Hall effect hierarchy in the case of a monolayer graphene. The fundamental difference in a definition of a typical semiconductor and a monolayer graphene filling factor is pointed out. The calculations… (More)

- K. Roszak, L. Jacak, P. Machnikowski
- 2006

We show that the phonon-induced pure dephasing of excitons in quantum dots can be interpreted in terms of information leakage from the carrier subsystem to the lattice environment. We derive a quantitative relation between the coherence of the system, as manifested by the amplitude of the coherent optical polarization, and the amount of available which path… (More)

- Janusz Jacak, Lucjan Jacak
- Science and technology of advanced materials
- 2016

The commensurability condition is applied to determine the hierarchy of fractional fillings of Landau levels in monolayer and in bilayer graphene. The filling rates for fractional quantum Hall effect (FQHE) in graphene are found in the first three Landau levels in one-to-one agreement with the experimental data. The presence of even denominator filling… (More)

- Piotr Sitko, Lucjan Jacak
- 1994

We find the RPA correlation energy and collective modes of the systems of composite fermions corresponding to the fillings of 1/3, 1/5, 2/5 in the fractional quantum Hall effect. It is verified that transmutations to composite fermions do not change the groundstate energy.

- Katarzyna Roszak, Pawel Machnikowski, Lucjan Jacak
- Open Syst. Inform. Dynam.
- 2007

- L Jacak, A Janutka, P Machnikowski, A Radosz, J Krasnyj
- 2002

The effects resulting due to dressing of an exciton with phonons are analysed as the source of unavoidable decoherence of orbital degrees of freedom in quantum dots. The dressing with longitudinal optical phonons results in energetic shift of order of a few meV even of the ground state of exciton in a state-of-the-art InAs/GaAs dot and the mediating role of… (More)

- Lucjan Jacak
- 2003

Abstract. We show that the interaction between carriers confined in a quantum dot and the surrounding lattice under external driving of carrier dynamics has a dynamical, resonant character. The quality of Rabi oscillations in such a system depends on the relation between nonlinear spectral characteristics of the driven dynamics and the spectral density of… (More)

The commensurability condition is applied to determine the hierarchy of fractional filling of Landau levels for fractional quantum Hall effect (FQHE) in monolayer and bilayer graphene. Good agreement with experimental data is achieved. The presence of even-denominator filling fractions in the hierarchy of the FQHE in bilayer graphene is explained, including… (More)

- J Jacak, I Jóźwiak, L Jacak, K Wieczorek
- Journal of physics. Condensed matter : an…
- 2010

Although they describe properties of 2D Hall systems in the fractional quantum regime well, composite fermions suffer from the unexplained character of the localized magnetic field flux-tubes attached to each particle in order to reproduce the Laughlin correlations via Aharonov-Bohm phase shifts. The identification of the cyclotron trajectories of 2D… (More)