<html><body><div style="color:#000; background-color:#fff; font-family:garamond, new york, times, serif;font-size:18pt"><div>Quantum computation: Fragile yet error-free</div><div><a href="http://www.sciencedaily.com/releases/2014/06/140612142219.htm">http://www.sciencedaily.com/releases/2014/06/140612142219.htm</a></div><div><a href="http://www.sciencemag.org/content/early/2014/06/11/science.1253742">http://www.sciencemag.org/content/early/2014/06/11/science.1253742</a></div><div><br>"This 7-ion system applied for encoding one logical quantum bit can be used as a building block for much larger quantum systems," says theoretical physicist Müller. "The bigger the lattice, the more robust it becomes. The result might be a quantum computer that could perform any number of operations without being impeded by errors."</div><div><br></div><div>*****</div><div>The additional ions useful in error correction would also have to be entangled across all other ions
in all the other qubits so the number of entangled ions would need to increase significantly. The record number of entangled ions to date would allow for 2 error free qubits in this scenario.</div><div><br></div><div>Dennis May</div></div></body></html>