Foucault pendulum tagged posts

This artist’s rendition shows a laser light guiding the evolution of an electronic spin within an atomic-scale defect in diamond. These light-driven loops give rise to a geometric phase, a quantum logic operation that shows remarkable resilience to noise. Credit: Peter Allen

The quantum bit ie ‘qubit’ is represented by a vector, pointing to a simultaneous combination of the 1 and 0 states. To fully implement a qubit, it is necessary to control the direction of this qubit’s vector, which is generally done using fine-tuned and noise-isolated procedures. Researchers have demonstrated the ability to generate a quantum logic operation, or rotation of the qubit, that – surprisingly—is intrinsically resilient to noise as well as to variations in the strength or duration of the control...