Such a technology would perform calculations using the laws of quantum mechanics, making for computers much faster
than conventional computers at certain tasks such as database searches and code - breaking.
Although still orders of magnitude
slower than conventional computers, bubble logic can operate about 100 times faster than existing microfluidic chips, the researchers say.
Using the quantum property of superposition, quantum computers will be able to find target items within large piles of data far faster
than conventional computers ever could.
But because electron spins offer one of the most promising models for quantum bitsphysical states that can store far more
information than conventional computer bitsscientists have sought ways around the coherence problem.
The new chips have the potential to be orders of magnitude more
efficient than a conventional computer, according to Rajit Manohar, an electrical and computer engineer at Cornell University in Ithaca, N.Y., and member of the DARPA collaboration.
Quantum computers theoretically could be billions of times faster
than conventional computers.
This property is central to quantum cryptography, where it allows two people to be sure a secret key they shared was not intercepted, and to quantum computing, as entangled bits occupy a superposition of two or more states at once and so can be used to solve some problems much faster
than conventional computers.
«There is an enormous gap between demonstrating some kind of quantum effect in eight qubits, as they have done here, and saying that they have a 128 - qubit chip that can perform a computationally interesting task faster
than a conventional computer,» he says.
In that way it will be much faster
than conventional computers and will be able to solve tasks that can not currently be solved, because it simply takes too long,» says Charles Marcus.
Scientists have long been trying to create quantum computers that exploit the inherently unstable nature of quantum particles, or «qubits,» and can therefore perform operations many orders of magnitude faster
than conventional computers.