A team of scientists at the University of Sydney has solved the widespread problem of quantum sensors by developing noise reduction technology that works 100 million times better than traditional methods. Under the guidance of Professor Michael Birtsuk, physicists managed to "deceive" too sensitive sensors, forcing them to block background noise, which interfere with the protocols for processing the measurement results, correctly interpret signals. The so-called leakage of spectral components makes it difficult to work with a signal. With the help of trapped atomic ions, researchers were able to reduce leakage by many orders of magnitude, compared to modern methods. According to Birtsuk, the new method, identifying the source of interference that occurs in quantum computers due to environmental influences, under certain circumstances, suppresses noise 100 million times better than existing methods. "Our approach is relevant for almost all quantum sensors and can also be used for quantum computing, since it helps to identify sources of hardware errors. This is a significant step forward in working with quantum sensors, "says Birtsuk.

The new protocol can be used in medicine, for example, when images are obtained inside living cells, or in safety systems where quantum magnetometers are used that measure magnetic fields for searching and capturing a target, reports ZDNet. The achievements of quantum physics and nanotechnology for the detection of cancer markers were made by specialists from five countries under the guidance of an Australian professor. They developed a biosensor capable of detecting a 3.5 nm molecule and monitoring its interactions for a long time.

Original article: New method reduces quantum noise 100 million times better than analogues.