Could a quantum sensor be used to detect dark matter in the universe? The answer is yes. The reason for this is because a quantum sensor is sensitive enough to potentially detect dark matter.
Dark matter is considered to be one of the biggest mysteries in the universe. Scientists are still not sure what it exactly is. In theory, it consists of particles that have almost no mass. This is why it is undetectable. The radio waves generated by dark matter in hypothetical scenarios would be weak and could not be detected by normal sensor technology.
The radio waves could be detected by a quantum sensor that is built into a radio device. Quantum states can now be controlled and created, due to recent developments in the field. This is why it has been possible to create quantum sensors that are small in size and highly sensitive. The radio that a quantum sensor would be built into would amplify any discovered signals at scanned frequencies to increase the chances of them being detected.
By doing this, it potentially becomes possible to find out what dark matter is. Finding out what it is would be a major breakthrough. Dark matter does not interact with electromagnetic radiation and so it is not visible, but it is considered to be the reason for a number of gravitational effects. It is said that around 80% of the mass in the universe is dark matter. Candidates for dark matter, such as dark photons, weak interacting massive particles, axions or isolated neutrinos could finally be discovered.
Similarly, like in quantum computers, quantum bits or qubits are found in quantum sensors. The only difference is that a quantum sensor consists of only one qubit, while a quantum computer uses 50-100 qubits part of a quantum processor. It is the qubit that makes it possible to pickup any potential dark matter signals at candidate frequencies.