Results 51 to 60 of about 81,116 (318)

Quantum key distribution using quantum dot single-photon emitting diodes in the red and near infrared spectral range

, 2012
We report on in-lab free space quantum key distribution (QKD) experiments over 40 cm distance using highly efficient electrically driven quantum dot single-photon sources emitting in the red as well as near-infrared spectral range.
Heindel, Tobias, Eichfelder, Marcus, Hargart, F., Michler, P., Eichfelder, M., Rossbach, R., Kessler, C., Rau, Markus, Weinfurter, Harald, Reitzenstein, S., Höfling, Sven, Schneider, C., Lermer, Matthias, Nauerth, Sebastian, Rossbach, Robert, Fuerst, M., Forchel, A., Forchel, Alfred, Reitzenstein, Stephan, Weinfurter, H., Kessler, Christian A., Schulz, W., Weier, Henning, Fuerst, Martin, Hoefling, S., Rau, M., Schulz, Wolfgang-Michael, Michler, Peter, Nauerth, S., Jetter, M., Schneider, Christian, Jetter, Michael, Lermer, M., Weier, H., Heindel, T., Hargart, Fabian, Kamp, Martin, Kamp, M.   +37 more
core   +1 more source

Mixed‐class J‐domain protein scaffolds promote expanded aggregate handling and multivalent Hsp70 engagement during functional disaggregase assembly

FEBS Letters, EarlyView.
Protein aggregates threaten proteostasis and cell health. In human cells, Hsp70–J‐domain protein‐based disaggregases remove aggregates, but how they assemble remains unclear. Our biochemical findings show that DNAJA2‐ and DNAJB1‐containing disaggregase scaffolds enhance luciferase aggregate targeting, and that Hsp70 recruitment by both J‐domain ...
Anna Szlachcic, Nadinath B. Nillegoda
wiley   +1 more source

Transient dynamics of a single molecular transistor in the presence of local electron–phonon and electron–electron interactions and quantum dissipation

Scientific Reports, 2022
We consider a single molecular transistor in which a quantum dot with local electron–electron and electron–phonon interactions is coupled to two metallic leads, one of which acts like a source and the other like a drain.
Manasa Kalla, Narasimha Raju Chebrolu, Ashok Chatterjee   +2 more
doaj   +1 more source

Influence of Geometrical Shape on the Characteristics of the Multiple InN/In_xGa_1−xN Quantum Dot Solar Cells

Nanomaterials, 2021
Solar cells that are based on the implementation of quantum dots in the intrinsic region, so-called intermediate band solar cells (IBSCs), are among the most widely used concepts nowadays for achieving high solar conversion efficiency.
Asmae El Aouami, Laura M. Pérez, Kawtar Feddi, Mohamed El-Yadri, Francis Dujardin, Manuel J. Suazo, David Laroze, Maykel Courel, El Mustapha Feddi   +8 more
doaj   +1 more source

Fractionalization into Merons in Quantum Dots [PDF]

Physical Review Letters, 2007
We study by exact diagonalization, in the lowest Landau level approximation, the Coulomb interaction problem of N = 4 and N = 6 quantum dot in the limit of zero Zeeman coupling. We find that meron excitations constitute the lowest lying states of the quantum dots.
Petkovic, A., Milovanovic, M. V.
openaire   +3 more sources

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

FEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Mid-Infrared Quantum-Dot Quantum Cascade Laser: A Theoretical Feasibility Study

Photonics, 2016
In the framework of a microscopic model for intersubband gain from electrically pumped quantum-dot structures we investigate electrically pumped quantum-dots as active material for a mid-infrared quantum cascade laser.
Stephan Michael, Weng W. Chow, Hans Christian Schneider   +2 more
doaj   +1 more source

Theory of polaron resonance in quantum dots and quantum-dot molecules [PDF]

Journal of Applied Physics, 2007
This work presents the theory of exciton coupling to photons and longitudinal optical (LO) phonons in quantum dots (QDs) and quantum-dot molecules (QDMs). Resonant-round trips of the exciton between the ground (bright) and excited (dark or bright) states, mediated by the LO phonon, alter the decay time and yield the Rabi oscillation.
openaire   +2 more sources

Supercurrent in a Double Quantum Dot [PDF]

Physical Review Letters, 2018
6 pages, 5 figures, Supplemental Material available as ancillary ...
Estrada Saldaña, J. C., Vekris, A., Steffensen, G., Žitko, R., Krogstrup, P., Paaske, J., Grove-Rasmussen, K., Nygård, J.   +7 more
openaire   +4 more sources

Accessing the quantum world through electronic transport in carbon nanotubes [PDF]

, 2006
In this thesis we will focus on (a) superconducting electrodes attached to carbon nanotube quantum dots in order to study the effects of superconducting correlations on quantum systems and (b) local gate control of carbon nanotubes in order to define
Gräber, Matthias Rudolf
core   +1 more source