Using a new method, quantum sensors detect even the smallest changes in magnetic or
Such devices will allow precisemeasurements in the field of materials science and fundamental physics. Scientists use them to study exotic states of matter, such as time crystals and topological phases. Other researchers use them to characterize practical devices, such as experimental quantum memory.
But previously, sensors could only find a fewcertain fields, this greatly limited their usefulness. Quantum sensors can take many forms. But essentially these are systems where some particles are in a finely balanced state, so even small changes in the fields can upset the balance.
The system the team developed is calledquantum mixer. She uses a beam of microwaves to introduce a second frequency into the detector. Therefore, the frequency of the field under study becomes different - now it is the difference between the original frequency and the frequency of the added signal. This process allows the detector to operate at any desired frequency without loss.
During the experiment, the device easily detected a 150 MHz signal using a 2.2 GHz qubit detector.
The team believes that the development can be applied incompletely different areas. For example, scientists have proposed its use in biomedicine because it can make available a range of frequencies of electrical or magnetic activity at the level of an individual cell.
Using the new system, it is also possible to detect signals from a single neuron, for example, in response to some stimulus.
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