Quantum computing hits the rocks, springs leak

Written by Jason Cundall

June 27, 2005 // 1:43 p.m.

Tags: #quantum-computing

A limit on how long information persists within quantum devices could mean that Quantum computing faces a big problem as researchers try and make workable technology from the lab experiments:

ATTEMPTS to build quantum computers could run up against a fundamental limit on how long useful information can persist inside them. Exceed the limit and information could just leak away, making computation impossible.

“Quantum information will inevitably be lost after a certain time, even without any external disturbance”A quantum computer manipulates stored information in quantum bits, or qubits. Because a qubit can be in two states at the same time, and can be entangled with other qubits, a quantum computer can carry out multiple calculations simultaneously. But the entire system is delicate: during a computation the qubits have to be isolated from their environment, because any outside disturbance can cause "decoherence" and spoil the calculations.


More from New Scientist here.

Express your disgust in an appropriately 'Daily Wail' style at the lack of "quantums coherence" and "the state of qubits today" in the news discussion forum...
Discuss this in the forums

QUICK COMMENT

Week in review

WEEK IN REVIEW

TOP STORIES

SUGGESTED FOR YOU