@article{MTMT:3370636, title = {Impact of undamped and damped intramolecular vibrations on the efficiency of photosynthetic exciton energy transfer}, url = {https://m2.mtmt.hu/api/publication/3370636}, author = {Juhász, Imre Benedek and Csurgay, Árpád}, doi = {10.1063/1.5009114}, journal-iso = {AIP ADV}, journal = {AIP ADVANCES}, volume = {8}, unique-id = {3370636}, year = {2018}, eissn = {2158-3226}, pages = {045318-1-045318-21} } @inproceedings{MTMT:3421115, title = {Physical Constraints on Quantum Circuits}, url = {https://m2.mtmt.hu/api/publication/3421115}, author = {Civalleri, PP and Corinto, F and di, Torino P and Csurgay, Árpád}, booktitle = {2017 IEEE INTERNATIONAL CONFERENCE ON REBOOTING COMPUTING (ICRC)}, doi = {10.1109/ICRC.2017.8123663}, unique-id = {3421115}, year = {2017}, pages = {212-215} } @article{MTMT:3277654, title = {Guest Editorial - Special Issue on Quantum Circuits}, url = {https://m2.mtmt.hu/api/publication/3277654}, author = {Civalleri, PP and Csurgay, Árpád and Porod, W}, doi = {10.1002/cta.2361}, journal-iso = {INT J CIRC THEOR APP}, journal = {INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS}, volume = {45}, unique-id = {3277654}, issn = {0098-9886}, keywords = {SYSTEMS; NETWORKS; PARADIGM}, year = {2017}, eissn = {1097-007X}, pages = {861-863} } @article{MTMT:3277508, title = {Toward engineering design of quantum circuits}, url = {https://m2.mtmt.hu/api/publication/3277508}, author = {Csurgay, Árpád and Juhász, Imre Benedek and Civalleri, PP}, doi = {10.1002/cta.2358}, journal-iso = {INT J CIRC THEOR APP}, journal = {INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS}, volume = {45}, unique-id = {3277508}, issn = {0098-9886}, abstract = {A new engineering discipline called quantum technology' is emerging. Nanotechnology and cryotechnology enable engineers to develop devices and integrated circuits in which quantum phenomena have dominant sway. Macroscopic finite-state artificial atoms' are realized exploiting superconductive Josephson effect, and these atoms' exchange microwave photons in superconductive microwave circuits. The achievements of cavity quantum electrodynamics in quantum optics are mimicked in the microwave frequency range. The new technology is dubbed circuit quantum electrodynamics. This paper tries to call the attention of engineers majoring in circuit theory and design on the challenges they face in designing quantum circuits. Modeling and simulation of quantum circuit components are reviewed. Approximate closed quantum system models as well as more accurate open system models are introduced in the case of single quantum devices and composite quantum systems. The effects of amplitude damping and phase damping are illustrated by simulation. The role of classical resistors in quantum circuits is investigated. Special attention is given to the almost standardized technology developed for superconductive microwave quantum circuits. Open problems are identified that circuit designers face in developing computer-aided-design tools for quantum circuits. Copyright (c) 2017 John Wiley & Sons, Ltd.}, keywords = {SYSTEMS; DYNAMICS; Quantum circuit; QUTIP; PYTHON FRAMEWORK; superconductive microwave quantum circuits; modeling and simulation of quantum circuits; closed and open quantum systems; circuit QED}, year = {2017}, eissn = {1097-007X}, pages = {882-896} } @article{MTMT:3341018, title = {Nanoscale spectrum analyzer based on spin-wave interference}, url = {https://m2.mtmt.hu/api/publication/3341018}, author = {Papp, Ádám and Porod, W and Csurgay, Árpád and Csaba, György}, doi = {10.1038/s41598-017-09485-7}, journal-iso = {SCI REP}, journal = {SCIENTIFIC REPORTS}, volume = {7}, unique-id = {3341018}, issn = {2045-2322}, abstract = {We present the design of a spin-wave-based microwave signal processing device. The microwave signal is first converted into spin-wave excitations, which propagate in a patterned magnetic thin-film. An interference pattern is formed in the film and its intensity distribution at appropriate read-out locations gives the spectral decomposition of the signal. We use analytic calculations and micromagnetic simulations to verify and to analyze the operation of the device. The results suggest that all performance figures of this magnetoelectric device at room temperature (speed, area, power consumption) may be significantly better than what is achievable in a purely electrical system. We envision that a new class of low-power, high-speed, special-purpose signal processors can be realized by spin-waves.}, year = {2017}, eissn = {2045-2322} } @inproceedings{MTMT:3002080, title = {Human Centered Nature Inspired Engineering in Information Technology and Bionics}, url = {https://m2.mtmt.hu/api/publication/3002080}, author = {Csurgay, Árpád}, booktitle = {Proceedings of the Workshop on Information Technology and Bionics}, unique-id = {3002080}, year = {2015}, pages = {14-15} } @article{MTMT:2852856, title = {A computational model for label-free detection of non-fluorescent biochromophores by stimulated emission}, url = {https://m2.mtmt.hu/api/publication/2852856}, author = {Fekete, Ádám and Csurgay, Árpád}, doi = {10.1364/BOE.6.001021}, journal-iso = {BIOMED OPT EXPRESS}, journal = {BIOMEDICAL OPTICS EXPRESS}, volume = {6}, unique-id = {2852856}, issn = {2156-7085}, year = {2015}, pages = {1021-1029} } @inproceedings{MTMT:2964346, title = {Engineering QED - Quantum Circuits}, url = {https://m2.mtmt.hu/api/publication/2964346}, author = {Juhász, Imre Benedek and Fekete, Ádám and Csurgay, Árpád}, booktitle = {Proceedings of the Workshop on Information Technology and Bionics}, unique-id = {2964346}, year = {2015}, pages = {62-64} } @article{MTMT:2944974, title = {Fluorescence in two-photon-excited diffusible samples exposed to photobleaching: a simulation-based study}, url = {https://m2.mtmt.hu/api/publication/2944974}, author = {Juhász, Imre Benedek and Csurgay, Árpád}, doi = {10.1117/1.JBO.20.1.015001}, journal-iso = {J BIOMED OPT}, journal = {JOURNAL OF BIOMEDICAL OPTICS}, volume = {20}, unique-id = {2944974}, issn = {1083-3668}, abstract = {We created a simulation model to investigate the characteristics of fluorescence in two-photon-excited samples. In the model, the sample is a diffusible solution of fluorophore molecules, which is divided into cubic cells and illuminated by a train of focused laser pulses described as a Gaussian beam. Simulating the state transitions according to a multilevel photodynamic model (also including photobleaching and intersystem crossing), the simulator provides the expected number and the spatial distribution of emitted photons over time. Our simulations demonstrated how the illumination laser power, diffusion, and the photodynamic parameters of the fluorophore affect fluorescence. We revealed the unusual fluorescent profile that evolves as photobleaching progresses: the most photons are not emitted from the focus (where a "dark hole" appears) but from an ellipsoid around the focus. The model could be adapted to several fluorescent techniques (such as two-photon microscopy and fluorescence recovery after photobleaching). Furthermore, it might help to optimize the operating parameters of the measurement devices (e.g., in order to reach higher image quality and lower photobleaching). (C) The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License.}, year = {2015}, eissn = {1560-2281} } @inproceedings{MTMT:2757947, title = {Simulation-based investigation of the three-dimensional distribution of fluorescence and photobleaching in multi-photon excited samples}, url = {https://m2.mtmt.hu/api/publication/2757947}, author = {Juhász, Imre Benedek and Csurgay, Árpád}, booktitle = {Optical Modelling and Design III}, doi = {10.1117/12.2052243}, unique-id = {2757947}, abstract = {We present a numerical study on the spatial distribution of fluorescence and photobleaching occurring in samples subject to multi-photon excitation. We developed a simulation model and implemented a simulator program. Its quantitative predictions can help to find the optimal operating parameters (such as laser power, pulse length, pulse repetition rate) of the two-photon microscope to reach higher image quality, to reduce undesired photobleaching, and to pave the way for optimized photoswitching-based super-resolution imaging. Conversely, the simulator might also be useful when photodynamic parameters are searched for. Furthermore, such simulations can promote the evaluation of the results of other fluorescence-based techniques [e.g. fluorescence recovery after photobleaching (FRAP) measurements]. The photodynamic model of the fluorophore contains a ground state, an excited state, a triplet state, and several photobleached states; the state transitions are characterized by absorption cross sections and lifetimes. The sample is modeled as a fluorophore solution divided into cubic cells among which diffusion takes place. The illumination is simulated as a focused laser pulse train described by a pulsed Gaussian beam. As a demonstration of the capabilities of the simulator, an example is presented that reveals the spatial distribution of photon emission in the sample investigated by a two-photon microscope in the case of different laser and photobleaching parameters, assuming one-photon absorption induced photobleaching. The simulation demonstrates quantitatively how photobleaching affects the spatial distribution of fluorescence and the resolution of the microscope. © 2014 SPIE.}, keywords = {FLUORESCENCE; simulation; Fluorophores; Photons; Simulators; MULTIPHOTON PROCESSES; image reconstruction; spatial distribution; Nuclear physics; numerical model; Numerical models; Photobleaching; Two photon; fluorescence recovery after photobleaching; photodynamics; Microscopes; Spatial profiles; Two-photon microscope; spatial profile; fluorescence recovery after photobleaching (FRAP)}, year = {2014} }