Re: The effects of quantum computers

From: Unruh (unruh-spam_at_physics.ubc.ca)
Date: 09/29/05 

Date: 29 Sep 2005 16:47:36 GMT

"Roger Schlafly" <rogersc1@mindspring.com> writes:

>"Unruh" <unruh-spam@physics.ubc.ca> wrote:
>> The most trivial QC HAVE been built. On the other hand they are not very
>> useful. A 30 or so bit QC would already be useful for quantum simulations
>> (but not for factoring where more like 5000 bits would be needed).

>Let me know when someone makes a QC with 2 qubits.

A QC with 7 bits has been made. A QC with 2 bits has also been made. The
algorithms it can solve are limited, but it is very good for simulating 4
level quantum systems with arbitrary energy levels, or two level systems
with arbitrary interactions. However, this can be calculated on a
conventional computer more rapidly than the simulation can be run.