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Extending Coherence Time in Quantum Memory

Category: Science & Technology
Posted: August 19, 2014 02:09PM
Author: Guest_Jim_*

One of the biggest challenges with quantum computers is finding a way to store quantum information for extended periods of time. There are many different approaches being studied right now for preserving the information, and each has its own advantages and disadvantages. Now researchers at the Vienna University of Technology have combined two of these techniques and managed to extend the stability of the information.

One of the techniques being developed encodes the quantum information onto nitrogen atoms inside of diamonds, which protects them from external forces. Another technique encodes information onto photons trapped in a resonator. The researchers have combined these two concepts by using a microwave resonator to encode information onto multiple nitrogen atoms. This actually keeps the quantum information coherent for longer than it would normally by causing all of the nitrogen atoms to be coupled with the resonator. This mass coupling prevents the atoms from losing coherence, keeping the quantum information accessible for longer.

By opening the door to hybrid quantum technologies this way, it is hard to predict what new technologies may be created in the future. Of course quantum computers will see a benefit, but the potential of this research could be greater than longer memory storage.

Source: Vienna University of Technology



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