Using Quantum Error to Measure Your Environment

Using Quantum Error to Measure Your Environment

Exploring mysteries of the universe

Selected notes ~

+  Gravitational waves from distant neutron stars are difficult to detect. Right now, gravitational waves can be detected at the Laser Interferometer Gravitational-Wave Observatory (LIGO) in Hanford, Washington, and Livingston, Louisiana. LIGO has been developed over decades with the efforts of hundreds of scientists. Most current searches of dark matter involve ton-scale experiments using cryogenics or liquefied gases like xenon or argon, and operate in deep underground mines.

“Devices operating in the quantum regime are very fragile and can be destroyed by measurement from the outside world,” said Singh. “Usually this a problem, which is the case in quantum computing for example, but if you look at these systems in a controlled setting, you can use this destruction of quantum properties as a way to measure your environment.”

+  However, dark matter and gravitational waves exert tiny, weak forces that may be detectable by a new crop of quantum devices, such as centimeter-scale or smaller super fluid helium acoustic devices, quartz resonators and photonic crystal cavities. All these devices involve small masses that are deformed due to interaction with weak forces. By continuously monitoring them, scientists can detect the tiny motion due to interaction with weak forces.

+  She also wants to push the field of quantum sensing forward in general. “It has been demonstrated multiple times, in multiple ways, that using quantum correlations makes better sensors than the limits permitted by classical technology,” she said.

Source:  7th Space.  Exploring mysteries of the universe‚Ķ

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