Quantum Technologies on a Raspberry Pi (and HackRF One) - Prof. Ben Varcoe @ DEFCON 31
Abstract
Quantum Sensing is a new paradigm of technology that allows us to use quantum-level effects for macro-level sensing outputs. Join Ben as he demonstrates how to use off-the-shelf components to build a quantum sensor; using just a HackRF, a Raspberry Pi, and some high-quality oscillators being the primary ingredients!
Time shifts are used to test special and general relativity, they are used for navigation and they shed light on things like quantum field theory and quantum gravity. In special relativity, a moving clock will have a time shift with respect to a stationary clock. This is typically very small and requires extremely fast moving objects to really see a difference. On the other hand an accelerated clock adds something new. Rather than just seeing a change in the passage of time the accelerated observer sees a change in the speed of light for other observers. To measure this we shall make use of the Rindler frame; an artefact of "Special Relativity" rather than "General Relativity".
By utilising these effects and a little quantum field theory, we can use the fact that in the Rindler frame, time shifts would manifest as phase shifts, hence a very sensitive measurement of phase could detect the acceleration based time shifts giving us a new kind of quantum sensor.. All of which can be done on off-the-shelf components, as Ben shall be building and demonstrating during the village!
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