TY - JOUR AU - Homa, Gábor AU - Bernád, J.Z. AU - Csordás, András TI - Analytical evaluation of the coefficients of the Hu-Paz-Zhang master equation: Ohmic spectral density, zero temperature, and consistency check JF - PHYSICAL REVIEW A J2 - PHYS REV A VL - 108 PY - 2023 IS - 1 PG - 15 SN - 2469-9926 DO - 10.1103/PhysRevA.108.012210 UR - https://m2.mtmt.hu/api/publication/34083437 ID - 34083437 N1 - Export Date: 08 March 2024 LA - English DB - MTMT ER - TY - JOUR AU - Homa, Gábor AU - Balka, Richárd AU - Bernád, J.Z. AU - Károly, M. AU - Csordás, András TI - Newton’s identities and positivity of trace class integral operators JF - JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL J2 - J PHYS A-MATH THEOR VL - 56 PY - 2023 IS - 14 PG - 14 SN - 1751-8113 DO - 10.1088/1751-8121/acc147 UR - https://m2.mtmt.hu/api/publication/33720054 ID - 33720054 N1 - Export Date: 08 March 2024 LA - English DB - MTMT ER - TY - JOUR AU - Homa, Gábor AU - Csordás, András AU - Csirik, Mihály AU - Bernád, József Zsolt TI - Range of applicability of the Hu-Paz-Zhang master equation JF - PHYSICAL REVIEW A J2 - PHYS REV A VL - 102 PY - 2020 IS - 2 PG - 13 SN - 2469-9926 DO - 10.1103/PhysRevA.102.022206 UR - https://m2.mtmt.hu/api/publication/31595143 ID - 31595143 LA - English DB - MTMT ER - TY - JOUR AU - Szépfalusy, Péter AU - Csordás, András TI - A Bose-Einstein-kondenzációtól az atomlézerig JF - FIZIKAI SZEMLE J2 - FIZIKAI SZEMLE VL - 66 PY - 2016 IS - 1 SP - 17 EP - 24 PG - 8 SN - 0015-3257 UR - https://m2.mtmt.hu/api/publication/3044512 ID - 3044512 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Rakyta, Péter AU - Vigh, Máté AU - Csordás, András AU - Cserti, József TI - Protected edge states in silicene antidots and dots in magnetic field JF - PHYSICAL REVIEW B J2 - PHYS REV B VL - 91 PY - 2015 IS - 12 PG - 9 SN - 2469-9950 DO - 10.1103/PhysRevB.91.125412 UR - https://m2.mtmt.hu/api/publication/2815608 ID - 2815608 N1 - CODEN: PRBMD LA - English DB - MTMT ER - TY - JOUR AU - Rakyta, Péter AU - Tóvári, Endre AU - Csontos, Miklós AU - Csonka, Szabolcs AU - Csordás, András AU - Cserti, József TI - Emergence of bound states in ballistic magnetotransport of graphene antidots JF - PHYSICAL REVIEW B J2 - PHYS REV B VL - 90 PY - 2014 IS - 12 PG - 7 SN - 2469-9950 DO - 10.1103/PhysRevB.90.125428 UR - https://m2.mtmt.hu/api/publication/2727599 ID - 2727599 AB - An experimental method for detection of bound states around an antidot formed from a hole in a graphene sheet is proposed by measuring the ballistic two terminal conductances. In particularly, we consider the effect of bound states formed by magnetic field on the two terminal conductance and show that one can observe Breit-Wigner like resonances in the conductance as a function of the Fermi level close to the energies of the bound states. In addition, we develop a new numerical method in which the computational effort is proportional to the linear dimensions, instead of the area of the scattering region beeing typical for the existing numerical recursive Green's function method. LA - English DB - MTMT ER - TY - JOUR AU - Király, Andrea AU - Dávid, Gyula AU - Csordás, András AU - Cserti, József TI - ,,Az atomoktól a csillagokig" - a fizika népszerûsítése középiskolások körében JF - FIZIKAI SZEMLE J2 - FIZIKAI SZEMLE VL - 64 PY - 2014 IS - 5 SP - 173 EP - 174 PG - 2 SN - 0015-3257 UR - https://m2.mtmt.hu/api/publication/2727591 ID - 2727591 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Csordás, András AU - Homa, Gábor AU - Szépfalusy, Péter TI - Calculation of the even-odd energy difference in superfluid Fermi systems using the pseudopotential theory JF - EUROPHYSICS LETTERS J2 - EUROPHYS LETT VL - 97 PY - 2012 IS - 3 PG - 5 SN - 0295-5075 DO - 10.1209/0295-5075/97/37005 UR - https://m2.mtmt.hu/api/publication/1999510 ID - 1999510 AB - The pseudopotential theory is extended to the Bogoliubov-de Gennes equations to determine the excess energy when one atom is added to the trapped superfluid Fermi system with even number of atoms. Particular attention is paid to systems being at the Feshbach resonance point. The results for relatively small particle numbers are in harmony with the Monte Carlo calculations, but are also relevant for systems with larger particle numbers. Concerning the additional one-quasiparticle state we define and determine two new universal numbers to characterize its widths. Copyright © EPLA, 2012. LA - English DB - MTMT ER - TY - THES AU - Csordás, András TI - Csapdázott ultrahideg gázok gerjesztéseinek vizsgálata PY - 2010 SP - 110 UR - https://m2.mtmt.hu/api/publication/1448926 ID - 1448926 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Csordás, András AU - Almásy, Orsolya AU - Szépfalusy, Péter TI - Gradient corrections to the local-density approximation for trapped superfluid Fermi gases JF - PHYSICAL REVIEW A J2 - PHYS REV A VL - 82 PY - 2010 IS - 6 PG - 12 SN - 2469-9926 DO - 10.1103/PhysRevA.82.063609 UR - https://m2.mtmt.hu/api/publication/1442651 ID - 1442651 AB - András Csordás* HAS-ELTE Statistical and Biological Physics Research Group, Pázmány P. Sétány 1/A, H-1117 Budapest, Hungary and Department of Physics of Complex Systems, Eötvös University, Pázmány P. Sétány 1/A, H-1117 Budapest, Hungary Orsolya Almásy† Institute for Physics, Eötvös University, Pázmány P. Sétány 1/A, H-1117 Budapest, Hungary Péter Szépfalusy‡ Department of Physics of Complex Systems, Eötvös University, Pázmány P. Sétány 1/A, H-1117 Budapest, Hungary and Research Institute for Solid State Physics and Optics, P. O. Box 49, H-1525 Budapest, Hungary Received 7 July 2010; published 8 December 2010 Two species superfluid Fermi gas is investigated on the BCS side up to the Feshbach resonance. Using the Greens’s function technique gradient corrections are calculated to the generalized Thomas-Fermi theory including Cooper pairing. Their relative magnitude is found to be measured by the small parameter (d/RTF)4, where d is the oscillator length of the trap potential and RTF is the radial extension of the density n in the Thomas-Fermi approximation. In particular, at the Feshbach resonance the universal corrections to the local density approximation are calculated and a universal prefactor κW=7/27 is derived for the von Weizsäcker–type correction κW(ℏ2/2m)(∇2n1/2/n1/2). © 2010 The American Physical Society URL: http://link.aps.org/doi/10.1103/PhysRevA.82.063609 DOI: 10.1103/PhysRevA.82.063609 PACS: 67.85.Lm, 74.20.Fg, 31.15.xg *csordas@tristan.elte.hu †Present address: Semilab Semiconductor Physics Laboratory Co. Ltd., Prielle Kornélia u. 2. H-1117 Budapest, Hungary; oalmasy@gmail.com. ‡psz@complex.elte.hu < Previous Article | Next Article > Physics - spotlighting exceptional research Read the latest from Physics : Viewpoint: Touching from a distance Viewpoint: A landmark proof Trends: Does cell biology need physicists? About | Terms and Conditions | Subscriptions | Search | Help © 2011 by American Physical Society. All rights reserved. Physical Review®, Physical Review Letters®, and Reviews of Modern Physics® are trademarks of the American Physical Society. Use of APS online journals implies that the user has read and agrees to the Terms and Conditions in the Subscription Agreement. LA - English DB - MTMT ER -