Because they can overcome the noise that quantum fluctuations produce, precisely controlled quantum systems can acquire information to achieve sensitivity and resolution that is superior compared to conventional measurement approaches. The applications range from precision measurements of the magnitude and direction of fields, measurements of phase shifts and superior performance of ensembles of atomic clocks.
One such example is the use of qubits as sensors for searching for dark matter particles. This approach improves the experimental signal-to-noise ratio for the detection of dark matter candidates.