Quantum Computing is an exciting area of R&D which may have a massive impact on society, especially in areas concerning big data due to its power to crunch down computing time. However, its potential is only just being explored, and below is an interesting (and accessible) article reporting how some aspects of fundamental laws of physics could be challenged by programs written for quantum computers.
This could have a huge impact in many areas where data, once processed, is assumed to have a fixed, irreversible state.
"Undo" will never be the same again ...
The original article in Nature can be found here.
… unlike regular computer bits, qubits can also take a form called superposition, where they are both one and zero at the same time. ... According to quantum laws, the simple passage of time will cause the computer [with both qubit set to zero] to fall out of this order, so that the qubits are soon in a random assortment of ones, zeros, or both. But scientists can also cause this to happen by running a program on their simple, 2-qubit computer. The scientists then ran a different program, which tells the computer to run “backward.” They then ran the first program again, and were able to recover their original, zero-zero state about 85 percent of the time. … The tricky part of the program is telling the computer to run backward, effectively making time run backward. …. But by forcing order to rise from disorder with a quantum computer program, scientists may have found a way around this basic physical law.