An automated approach for consecutive tuning of quantum dot arrays

An Automated Approach to Tuning

Wavefunction delocalization in quantum dot arrays: an asymptotic analysis

Intermediate-band solar cells using quantum dot arrays (QDAs) are theoretically predicted to significantly increase the efficiency with which solar energy can be harvested. In the limit of identical quantum dots, the wavefunction for electrons in a QDA will be fully delocalized. Fully delocalized wavefunctions have been theoretically shown to reduce thermal losses and consequently increase phot...

Multiple cotunneling in large quantum dot arrays.

We investigate the effects of inelastic cotunneling on the electronic transport properties of gold nanoparticle multilayers and thick films at low applied bias, inside the Coulomb-blockade regime. We find that the zero-bias conductance, g(0)(T), in all systems exhibits Efros-Shklovskii-type variable range hopping transport. The resulting typical hopping distance, corresponding to the number of ...

Tuning inter-dot tunnel coupling of an etched graphene double quantum dot by adjacent metal gates

Graphene double quantum dots (DQDs) open to use charge or spin degrees of freedom for storing and manipulating quantum information in this new electronic material. However, impurities and edge disorders in etched graphene nano-structures hinder the ability to control the inter-dot tunnel coupling, tC, the most important property of the artificial molecule. Here we report measurements of tC in a...

Electron teleportation with quantum dot arrays

Teleportation is a spectacular manifestation of quantum mechanics, and altogether an essential element of future information processing1 . It means reconstructing the (unmeasured) quantum state of a given object at a different location, without direct transfer of the object. Bennett et al.2 showed that EPR entanglement3 can be used for teleportation, which was recently experimentally demonstrat...