Abstract
The scalability of solid-state quantum computation relies on the ability of connecting the qubits to the macroscopic world. Quantum chains can be used as quantum wires to keep regions of external control at a distance. However, even in the absence of external noise their transfer fidelity is too low to assure reliable connections. We propose a method of optimizing the fidelity by minimal usage of the available resources, consisting of applying a suitable sequence of two-qubit gates at the end of the chain. Our scheme also allows the preparation of states in the first excitation sector as well as cooling.
| Original language | English |
|---|---|
| Article number | 062327 |
| Pages (from-to) | 062327-1-062327-5 |
| Number of pages | 5 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 75 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 2007 |
| Externally published | Yes |