Quantum Computing and Quantum Communication with Electrons in Nanostructures
Abstract
If the states of spins in solids can be created, manipulated, and measured at the singlequantum level, an entirely new form of information processing, quantum computing and quantum communication, will be possible. We review our proposed spinquantum dot architecture for a quantum computer and review some recent results on a deterministic source of entanglement generated by coupling quantum dots. Addressing the feasibility of quantum communication with entangled electrons we consider a scattering setup with an entangler and beam splitter where the current noise exhibits bunching behavior for electronic singlet states and antibunching behavior for triplet states. We show that spin currents can produce noise even in the absence of any charge currents.
 Publication:

arXiv eprints
 Pub Date:
 July 1999
 arXiv:
 arXiv:condmat/9907133
 Bibcode:
 1999cond.mat..7133L
 Keywords:

 Condensed Matter  Mesoscopic Systems and Quantum Hall Effect;
 Quantum Physics
 EPrint:
 7 pages, Latex, uses moriond.sty (included), 1 eps figure embedded with epsf, to be published in the proceedings of the XXXIVth Rencontres de Moriond "Quantum Physics at Mesoscopic Scale", held in Les Arcs, Savoie, France, January 2330, 1999