Science, Space and Technology News 2024
Researchers have developed a groundbreaking method that enhances the stability and performance of quantum systems, addressing issues like decoherence and control errors. This method, which exploits the cross-correlation between two noise sources, leads to a tenfold increase in coherence time, improved control fidelity, and superior sensitivity in quantum sensing.
Quantum technologies, including quantum computers and sensors, hold immense potential for revolutionizing various fields such as computing, cryptography, and medical imaging. However, their development has been hampered by the detrimental effects of noise, which can disrupt quantum states and lead to errors.
Schematic representation of destructive interference of cross-correlated noise, control sequences and experimental setup. The qubit is subjected to environmental noise δ. Applying a resonant drive with Rabi frequency Ω1 creates a protected dressed qubit which decoheres mainly due to ε1 – the amplitude noise in Ω1. Applying a second drive with modulation frequency eΩ1, Rabi frequency Ω2 and amplitude fluctuations ε2, reduces decoherence due to ε1.
: The duration for which quantum information remains intact is extended ten times longer compared to previous methods.: Enhanced precision in manipulating quantum systems leads to more accurate and reliable operations.: The ability to detect high-frequency signals surpasses the current state-of-the-art, enabling new applications in quantum sensing.
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