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Wyszukujesz frazę "Quinn, J. J." wg kryterium: Autor


Tytuł:
Composite Fermions and the Fractional Quantum Hall Effect
Autorzy:
Wójs, A.
Quinn, J. J.
Powiązania:
https://bibliotekanauki.pl/articles/2011133.pdf
Data publikacji:
1999-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.10.Pm
73.20.Dx
73.40.Hm
Opis:
The mean field composite fermion picture successfully predicts low lying states of fractional quantum Hall systems. This success cannot be attributed to a cancellation between the Coulomb and Chern-Simons interactions beyond the mean field and solely depends on the short-range of the Coulomb pseudopotential in the lowest Landau level. The class of pseudopotentials for which the mean field composite fermion picture can be applied is defined. The success or failure of the mean field composite fermion picture in various systems (electrons in excited Landau levels, Laughlin quasiparticles, charged magnetoexcitons) is explained.
Źródło:
Acta Physica Polonica A; 1999, 96, 5; 593-602
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fractional Quasiexcitons in Photoluminescence of Quantum Hall Liquids
Autorzy:
Wójs, A.
Gładysiewicz, A.
Quinn, J. J.
Powiązania:
https://bibliotekanauki.pl/articles/2044555.pdf
Data publikacji:
2005-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.35.Pq
71.35.Ji
73.43.-f
71.10.Pm
Opis:
Realistic calculations of photoluminescence spectra for a 20 nm quantum well at a filling factorν=1/3 are presented. The new states formed from charged excitons (trions) by correlation with the surrounding electrons are identified. These "quasiexcitons" differ from usual excitons and trions by having fractionally charged constituents. Their binding energies and emission intensities depend on the involved trion, leading to discontinuity in photoluminescence.
Źródło:
Acta Physica Polonica A; 2005, 108, 5; 923-928
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Condensation of Nonabelian Moore-Read Quasiholes in Correlated Composite Fermion Liquids
Autorzy:
Wodziński, D.
Wójs, A.
Quinn, J. J.
Powiązania:
https://bibliotekanauki.pl/articles/2047043.pdf
Data publikacji:
2006-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.10.Pm
73.43.-f
Opis:
Two- and three-body correlation functions (number of pairs or triplets vs. relative angular momentum) of electrons or Laughlin quasielectrons (i.e., composite fermions in their first excited Landau level) are studied numerically in several fractional quantum Hall liquids. It is shown directly that theν$\text{}_{e}$=4/11 liquid (corresponding to aν=1/3 filling of composite fermions in their first excited Landau level) is a paired state of quasielectrons, hence interpreted as a condensate of "second-generation" quasiholes of Moore-Readν=1/2 state of composite fermions.
Źródło:
Acta Physica Polonica A; 2006, 110, 3; 417-422
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Excitations of the Moore-Read ν=$\frac{5}{2}$ State: Three-Body Correlations and Finite-Size Effects on a Sphere
Autorzy:
Wόjs, A.
Quinn, J. J.
Powiązania:
https://bibliotekanauki.pl/articles/2038124.pdf
Data publikacji:
2004-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.10.Pm
73.43.-f
Opis:
Correlations in partially filled electron and composite fermion Landau levels are studied numerically. Insight into the nature of the correlations is obtained by using model pair pseudopotentials. Energy spectra of a model short-range three-body repulsion are calculated. Moore-Read ground state at the half-filling and its quasielectron, quasihole, magnetoroton, and pair-breaking excitations are all identified. The quasielectron/quasihole excitations are described by a composite fermion model for Laughlin-correlated electron pairs. Comparison of energy spectra and wavefunction overlaps obtained for different pseudopotentials suggests that finite-size effects can be important in numerical diagonalization studies on a sphere.
Źródło:
Acta Physica Polonica A; 2004, 105, 6; 575-584
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pair-Distribution Functions of Laughlin Quasielectrons in Partially Filled Composite Fermion Levels
Autorzy:
Wodziński, D.
Wójs, A.
Quinn, J. J.
Powiązania:
https://bibliotekanauki.pl/articles/2044550.pdf
Data publikacji:
2005-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.10.Pm
73.43.-f
Opis:
Pair-distribution functions g(r) of the Laughlin quasielectrons are calculated in the fractional quantum Hall states at electron filling factorsν=4/11 and 3/8. They all have a shoulder at a medium range, supporting the idea of quasielectron cluster formation. The intra- and inter-cluster contributions to g(r) are identified. The average cluster sizes are estimated; pairs and triplets of quasielectrons are suggested atν=4/11 and 3/8, respectively.
Źródło:
Acta Physica Polonica A; 2005, 108, 5; 909-914
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pairing and Condensation of Laughlin Quasiparticles in Fractional Quantum Hall Systems
Autorzy:
Wójs, A.
Yi, Kyung-Soo
Quinn, J. J.
Powiązania:
https://bibliotekanauki.pl/articles/2035751.pdf
Data publikacji:
2003-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.10.Pm
73.43.-f
Opis:
From the analysis of their interaction pseudopotentials, it is argued that (at certain filling factors) Laughlin quasiparticles can form pairs. It is further proposed that such pairs could have Laughlin correlations with one another and form condensed states of a new type. The sequence of fractions corresponding to these states includes all new fractions observed recently in experiment (e.g.,ν=5/13, 3/8, or 4/11).
Źródło:
Acta Physica Polonica A; 2003, 103, 6; 517-523
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spin Phase Transition in a Correlated Composite Fermion Liquid
Autorzy:
Wójs, A.
Simion, G.
Wodziński, D.
Quinn, J. J.
Powiązania:
https://bibliotekanauki.pl/articles/2047368.pdf
Data publikacji:
2007-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.10.Pm
73.43.-f
Opis:
We study spin polarization of the ν$\text{}_{e}$=4/11 fractional quantum Hall state corresponding to the ν=1/3 filling of the second composite fermion Landau level, and predict a spin phase transition in realistic systems.
Źródło:
Acta Physica Polonica A; 2007, 112, 2; 153-156
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trion Binding Energies and Wave Functions in Doped Quantum Wells
Autorzy:
Gładysiewicz, A.
Wójcik, K.
Wójs, A.
Quinn, J. J.
Powiązania:
https://bibliotekanauki.pl/articles/2043713.pdf
Data publikacji:
2005-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.35.Pq
71.35.Ji
Opis:
The energy spectra of negative trions (X$\text{}^{-}$=2e+h) in one-sided doped GaAs quantum wells are calculated. The maps of the trion binding energyΔ as a function of well width w, electron concentration n, and the magnetic field B are obtained. The dependence of the trion ground state ("bright singlet" versus "dark triplet") on those parameters is established.
Źródło:
Acta Physica Polonica A; 2005, 108, 4; 669-674
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ising Ferromagnetism of Composite Fermions
Autorzy:
Výborný, K.
Čertík, O.
Pfannkuche, D.
Wodziński, D.
Wójs, A.
Quinn, J. J.
Powiązania:
https://bibliotekanauki.pl/articles/2047042.pdf
Data publikacji:
2006-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.43.-f
71.10.Pm
75.10.Jm
Opis:
The quantum Hall ferromagnets at the half-filling of a pair of degenerate electron or composite fermion Landau levels are studied by exact numerical diagonalization. The results obtained using open and closed geometries (rectangular - with periodic boundary conditions and spherical) are compared. The ferro- and paramagnetic ground states are identified in finite-size energy spectra, and the pair-correlation functions are used in search of the domain structure at half-polarization.
Źródło:
Acta Physica Polonica A; 2006, 110, 3; 409-415
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spin Transition in a Correlated Liquid οf Composite Fermions
Autorzy:
Wójs, A.
Quinn, J.
Powiązania:
https://bibliotekanauki.pl/articles/1810412.pdf
Data publikacji:
2009-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.10.Pm
73.43.-f
Opis:
We study spin polarization of the $ν_e$=4/11 fractional quantum Hall state corresponding to the ν=1/3 filling of the second composite fermion Landau level, and predict a spin phase transition in realistic systems.
Źródło:
Acta Physica Polonica A; 2009, 115, 1; 153-155
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computational study of substrate isotope effect probes of transition state structure for acetylcholinesterase catalysis
Autorzy:
Sikorski, R..
Malany, S.
Seravalli, J.
Quinn, D.
Powiązania:
https://bibliotekanauki.pl/articles/147114.pdf
Data publikacji:
2002
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
acetylcholinesterase
carbonyl addition reactions
enzyme mechanisms
quantum mechanical calculations
transition state structure
Opis:
Secondary isotope effects for carbonyl addition reactions of methyl thioacetate, acetone and acetaldehyde have been calculated by ab initio quantum mechanical methods in an effort to interpret measured beta-deuterium isotope effects on acetylcholinesterase- catalyzed hydrolysis of acetylthiocholine. The calculated beta-deuterium isotope effect for equilibrium addition of methanol to methyl thioacetate is D3Keq = 0.965, and the corresponding effect for addition of methoxide ion to methyl thioacetate wherein three waters are hydrogen bonded to the carbonyl oxyanion is D3Keq = 1.086. Neither of these calculated isotope effects is as inverse as the experimental beta-deuterium isotope effect for acetylcholinesterase-catalyzed hydrolysis of acetylthiocholine, D3kE = 0.90š0.03. Structural comparisons show that the water-solvated methoxide adduct of methyl thioacetate is more expanded than is the neutral methanol addition adduct, and suggest that the degree to which the isotope effect is inverse (i.e. less than) is inversely correlated to the degree of expansion of the adduct. A similar correlation of beta-deuterium and beta-deuterium secondary isotope effects with the degree of expansion of the adducts is found for equilibrium additions of methanol and methoxide ion to acetaldehyde. These computational results suggest that the markedly inverse beta-deuterium isotope effect for the acetylcholinesterase reaction arises from enzymic compression of the transition state.
Źródło:
Nukleonika; 2002, 47,suppl.1; 9-12
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł

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