[davorak]

Thats great! I need to read the paper but if that is the life time of the physical qubit then it is much larger then what is typically considered needed for using quantum error correction to make logical qubits.

Logical qubits are made up of many physical qubits, with relatively short life times, to make one logical qubits with an infinite life time. The longer life time of logical qubits makes it considerably easier to perform long calculations and store information.

If anyone knows how easily quantum error correction can be applied to this system I would be interested in finding out.

[chid]

In theory, that amount of time should allow for error correction (assuming there are more qubits to work with). The critical factor for computation is this dephasing time divided by the gate operation time (how long it takes to modify the qubit) which should be on the order of at least 10^5.

Single qubit operations have been shown to be on the order of 10's of microseconds for P nuclear spins in Si. (Unfortunately behind paywall, http://www.nature.com/nature/journal/v496/n7445/full/nature1...)