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Формирање тамних поларитона и дво-поларитонских везаних стања у низовима атома и оптичких микрорезонатора.

dc.contributor.advisorRadonjić, Milan
dc.contributor.otherJelenković, Branislav
dc.contributor.otherKuraica, Milorad
dc.contributor.otherKonjević, Nikola
dc.contributor.otherDamnjanović, Milan
dc.creatorMaggitti, Angelo
dc.date.accessioned2016-12-30T16:08:34Z
dc.date.available2016-12-30T16:08:34Z
dc.date.issued2016-04-07
dc.identifier.urihttp://eteze.bg.ac.rs/application/showtheses?thesesId=4224
dc.identifier.urihttps://fedorabg.bg.ac.rs/fedora/get/o:13925/bdef:Content/download
dc.identifier.urihttp://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=48203023
dc.identifier.urihttp://nardus.mpn.gov.rs/123456789/7258
dc.description.abstractThis thesis covers a theoretical analysis of non-interacting and interacting quasi particles, called polaritons. Polaritons are composites, based on photonic and atomic excitations in a tunable and controlled manner. Dark-state polaritons, as a subclass of polaritons, are very curious objects, as they can act as a quantum memory of photons within an ensemble of alkali-metal atoms in -type conguration which admit electromagnetically induced transparency (EIT). This thesis focus on the formation of dark-state polaritons in degenerate two-level systems, where two light elds, a quantum probe and a classical driving eld, couple the same transition between the ground state and excited state manifold. An algorithm is going to be derived in order to determine the dispersion relation and inherent composition of the dark-state polaritons in the degenerate two-level system. The algorithm is based on a microscopic equation of motion technique and provides an extension of the non-degenerate case. Depending on the polarization of the light elds, it will be shown that either one or two dark-state polaritons can exist. Further, the calculated dark-state polaritons can be used in order to perform a frequency conversion and even a conversion of linear light polarization. In the second part of the thesis, interacting polaritons in arrays of coupled QED cavities will be discussed. In rst place, the standard Jaynes-Cummings model is discussed in order to provide a better insight to polaritons in QED cavities. Then, a modied Jaynes-Cummings model is introduced and derived in order to study dark-polaritons and their interaction. It will be shown that dark-polaritons directly depend on the common single photon detuning of the two coupling elds, quantum probe and classical driving eld. The interaction between dark-polaritons will be discussed where the emergence of dark-polariton bound pairs will be shown. By tuning the Stark-shift due to the classical control eld, the number and the composition of dark-polariton bound pairs can be controlled. It will be demonstrated that there exists a dark-polariton bound pair which diers from the aforementioned ones, because it represents a ground state of the system. Using that kind of a darkpolariton bound pair, storage and retrieval of a single photon can be performed, even though that the photons are in a two-photon bound state. In the last part of the thesis, disorder between QED cavities will be introduced in a controlled manner through staggered inter-cavity photon hopping strengths J1 and J2. Further, the appearance of a dark-polariton bound pair of a completely dierent type will be presented.sr
dc.description.abstractOva teza predstav a teorijsku analizu neinteragujuih i interagujuih kvazi-qestica, tzv. polaritona. Polaritoni su kombinacije fotonskih i atom- skih ekscitacija u kontrolisano promen ivom odnosu. Vrsta polaritona, tamni polaritoni, su veoma neobiqni objekti budui da mogu da slue kao kvantna memorija za fotone unutar ansambla atoma alkalnih metala u - konfiguraciji, a u vezi sa efektom elektromagnetno indukovane transparen- cije (EIT). Teza se fokusira na prouqavae formiraa tamnih polaritona u sistemima sa dva nivoa, osnovnim i pobuenim, koji poseduju mnogostrukosti degenerisanih podnivoa i spregnuti su kvantnim probnim i klasiqnim kon- trolnim laserskim po em. Bie izveden algoritam za dobijae disperzione relacije i odgovarajueg sastava tamnih polaritona u sistemima sa dva-nivoa i degeneracijom. Algoritam je zasnovan na tehnici mikroskopskih jednaqina kretaa i predstav a proxiree sluqaja bez degeneracije. Bie pokazano da u zavisnosti od polarizacije po a mogu postojati jedan ili dva tamna polari- tona. Tako dobijeni tamni polaritoni mogu biti korixeni za konverziju frekvencije i linearne polarizacije svetlosti. U drugom delu teze razmatraemo interagujue polaritone u nizovima spreg- nutih kvantno-elektrodinamiqkih optiqkih mikrorezonatora. Kao prvo, pri- kazan je standardni ejns-Kamingsov model da bi se obezbedio bo i uvid u polaritone unutar optiqkih mikrorezonatora. Zatim je uveden modifikovani ejns-Kamingsov model radi prouqavaa tamnih polaritona i interakcije meu ima. Bie pokazano da tamni polaritoni direktno zavise od zajed- niqke jednofotonske razdexenosti (detjuninga) korixenih po a, kvantnog probnog i klasiqnog kontrolnog. Interakcija izmeu tamnih polaritona e biti prodiskutovana, pri qemu e biti pokazana pojava vezanog para tamnih polaritona. Podexavaem Xtarkovog pomeraja usled kontrolnog po a moe se uticati na broj i osobine tih vezanih parova. Bie pokazano da postoji vezani par tamnih polaritona koji se razlikuje od pomenutih poxto pred- stav a osnovno stae sistema. Takav vezani par tamnih polaritona omoguava zarob avae i ixqitavae jednog od dva vezana fotona. U posledem delu teze bie uvedeno kontrolisano neureee u obliku naizmeniqnih parametara sprezaa meu mikrorezonatorima, J1 i J2, i bie pokazana pojava potpuno novog tipa vezanog para tamnih polaritona.en
dc.formatapplication/pdf
dc.languageen
dc.publisherУниверзитет у Београду, Физички факултетsr
dc.rightsAutorstvo-Nekomercijalno-Bez prerade 3.0 Srbija (CC BY-NC-ND 3.0)
dc.sourceУниверзитет у Београдуsr
dc.subjectEITsr
dc.subjectelektromagnetno indukovana transparencija (EIT)en
dc.subjecttamni polaritonien
dc.subjectniz kvantno-elektrodinamiqkih mikrorezonatoraen
dc.subjectinteragujui tamni polaritonien
dc.subjectvezani parovi tamnih polaritonaen
dc.subjectkvantna memorija za fo- tone i neureeeen
dc.subjectdark-state polaritonssr
dc.subjectcavity QED arrayssr
dc.subjectinteracting darkpolaritonssr
dc.subjectdark-polariton bound pairssr
dc.subjectquantum memory of light and disordersr
dc.titleFormation of dark-state polaritons and two-polariton bound states in arrays of atoms and optical cavitiessr
dc.title.alternativeФормирање тамних поларитона и дво-поларитонских везаних стања у низовима атома и оптичких микрорезонатора.en
dc.typePhD thesis
dcterms.abstractРадоњић, Милан; Кураица, Милорад; Дамњановић, Милан; Јеленковић, Бранислав; Коњевић, Никола; Маггитти, Aнгело;


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