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Mechanical qubit could be used in quantum sensors and quantum memories
- Swiss researchers have developed a mechanical qubit using acoustic wave resonators that holds massive potential for use in quantum sensing and quantum memories, according to Physics World.
- While the quantum computing platforms available today operate according to the principles of quantum electrodynamics, this new advancement allows for quantum information to be stored by mechanical resonators that interact with surroundings by quantized vibrations.
- While mechanical resonators have longer lifetimes than their electromagnetic counterparts, they could previously not store quantum information.
- The newly-developed mechanical qubit could store information using two different energy levels and remain in a coherent superposition of those two levels without interference from other levels.
- The team is now working on improving the qubit to enable its use in quantum information processing.
- Swapping excitations into the qubit could also allow it to be used in quantum sensing to measure things such as gravitational forces, which lone superconducting qubits cannot do.
- While the new mechanical qubit still needs improvement, as it is not suitable for quantum logic operations, its creation is a significant step forward towards creating a true mechanical quantum computer.
- The mechanical qubit, which is the first mechanical resonator that is nonlinear at the single quantum level, is described in Science.
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