Electromagnetic induced transparency is an optical phenomenon that allows transmission of a laser beam through dense medium by using control beam. Here, we propose the use quantum molecule where replaced electron tunneling between dots, which can be controlled external electric field, opening possibility to induce and slow light with gates. Our results show window appears if strength ${T}_{e}$ decay rate direct exciton ${\ensuremath{\Gamma}}_{1}$ obey condition...

Semiconductor quantum dots coherently driven by pulsed laser are fundamental physical systems which allow studying the dynamical properties of confined states. These attractive candidates for a solid-state qubit, open possibility several investigations in quantum-information processing. In this work we study effects specific decoherence process, spontaneous emission excitonic states, dot molecule. We model our system considering three-level Hamiltonian and solve corresponding master equation...

We theoretically investigate the implementation of a quantum controlled-phase gate in system constituted by single atom inside an optical cavity, based on electromagnetically induced transparency effect. First we show that probe pulse can experience $\ensuremath{\pi}$ phase shift due to presence or absence classical control field. Considering interplay cavity-EIT effect and memory process, demonstrated between two photons. To this end, first one needs store (control) photon ground atomic...

We discuss the optical response of a quantum molecule under action two lasers fields. Using realistic model and parameters, we map physical conditions to find three different phenomena reported in literature: tunneling induced transparency, formation Autler-Townes doublets, creation Mollow-like triplet. found that electron between dots is responsible for regime. Our results not only explain experimental literature but also give insights future experiments applications optics using molecules.

We investigate the optical response of quantum dot molecules coherently driven by polarized laser light. Our description includes splitting in excitonic levels caused isotropic and anisotropic exchange interactions. consider interdot transitions mediated hole tunneling between states with same total angular momentum bright dark exciton as allowed spin-flip hopping dots molecule. Using realistic experimental parameters we demonstrate that coupled exhibit a rich controllable response. show...

We report dissipative dynamics of two valley excitons residing in the $K$ and ${K}^{\ensuremath{'}}$ valleys a bare ${\mathrm{WSe}}_{2}$ monolayer one being integrated into bimodal optical cavity. In former, only when exciton-field detunings are rigorously equal (resonant detuning) can partially entangled stationary states be created. Otherwise, concurrence exciton qubits turns to zero. Remarkably, latter (the cavity), transfers entanglement from subsystem (exciton/light) other...

We theoretically investigate the generation of heralded entanglement between two identical atoms via cavity-assisted photon scattering in different configurations, namely, either both confined same cavity or trapped into locally separated ones. Our protocols are given by a very simple and elegant single-step process, key mechanism which is controlled-phase-flip gate implemented impinging single on single-sided cavities. In particular, when localized remote cavities, we introduce parallel...

We investigate the optical properties of a two-level system (TLS) coupled to one-dimensional array $N$ other TLSs with dipole-dipole coupling between first neighbors. The TLS is probed by weak field, and we assume that it has decay rate much greater than rates TLSs. For $N=1$ in limit Rabi frequency probe field smaller coupling, response TLS, i.e., its absorption dispersion, equivalent three-level atomic configuration which allows one observe electromagnetically induced transparency (EIT)...

The wide set of control parameters and reduced size scale make semiconductor quantum dots attractive candidates to implement solid-state computation. Considering an asymmetric double dot coupled by tunneling, we combine the action a laser field spontaneous emission excitonic state protect arbitrary superposition indirect exciton ground state. As by-product show how use protected solve Deutsch problem.

We theoretically studied the implementation of a quantum memory and an optical transistor in system composed by single atom trapped inside high finesse cavity. In order to store map state input pulse onto internal states (quantum memory) we employ electromagnetically induced transparency (EIT) phenomenon (which can work out as transistor) where information be transferred dark modelled three-level Λ-type configuration. our model consider suitable temporal shape for control field that ensures...

Electromagnetically induced transparency (EIT) is an optical phenomenon which allows a drastic modification of the properties atomic system by applying control field. It has been largely studied in last decades and nowadays we can find huge number experimental theoretical related studies. Recently similar was also shown quantum dot molecules (QDM), where field replaced tunneling rate between dots. Our results show that EIT regime, QDM are identical. However, here strong probe i.e., "coherent...

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This work consists of the experimental investigation wave phenomena using devices developed with technologies that allow greater depth in concepts studied physics classes.The activities carried out range from setting up experiments, collecting and analyzing data to preparing teaching materials, as well practical guides.The are investigated through three experiments: determination physical quantities simple harmonic motion a mass-spring system, measurement speed sound multichronometer...

We study the dissipative dynamics of two asymmetric quantum dots, coupled by tunneling, in presence a laser coherent radiation. By solving Liouville‐Von Neumman‐Lindblad equation associated with three‐level model Hamiltonian, we analyze effect spontaneous emission as decoherence channel. discuss several aspects system, such as, population dynamics, detuning and appearing electromagnetically induced transparency controlled tunneling. Our results show that efficiency tunneling coupling,...

Electromagnetically induced transparency (EIT) is an optical phenomenon which allows a drastic modification of the properties atomic system by applying control field. It has been largely studied in last decades and nowadays we can find huge number experimental theoretical related studies. Recently similar was also shown quantum dot molecules (QDM) , where field replaced tunneling rate between dots. Our results show that EIT regime, QDM are identical. However, here strong probe i.e.,...