𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Quantum computation and the production of entangled photons using coupled quantum dots

✍ Scribed by Oliver Gywat; Guido Burkard; Daniel Loss

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
276 KB
Volume
31
Category
Article
ISSN
0749-6036

No coin nor oath required. For personal study only.

✦ Synopsis

We review recent theoretical progress on the use of electron spins as qubits in coupled semiconductor quantum dots for quantum information processing. We discuss the spin exchange mechanism and its microscopic origin in both laterally and vertically tunnelcoupled quantum dots and explain how it can be used to implement the quantum XOR gate which, in combination with single spin rotations, allows to perform arbitrary quantum computations. In addition to their functionality as a quantum gate, coupled quantum dots can act as a source for photon pairs in entangled polarization states which are useful for quantum communication. We describe a mechanism for the production of such entangled photon pairs via a biexciton state in tunnel-coupled quantum dots.

πŸ“œ SIMILAR VOLUMES

Generation of three-qubit entangled stat
Generation of three-qubit entangled states using coupled multi-quantum dots
✍ M. Abdel-Aty; M.R.B. Wahiddin; A.-S.F. Obada πŸ“‚ Article πŸ“… 2007 πŸ› John Wiley and Sons 🌐 English βš– 123 KB

We discuss a mechanism for generating a maximum entangled state (Greenberger-Horne-Zeilinger (GHZ)) in a coupled quantum dots system, based on analytical techniques. The reliable generation of such states is crucial for implementing solid-state based quantum information schemes. The signature origin