there is no specific "quantum entanglement reader" device that can directly determine whether particles are entangled. Quantum entanglement is a phenomenon that describes the correlation between quantum particles, and its detection usually involves indirect measurements and inference.
To determine if particles are entangled, various experimental techniques are used, depending on the nature of the particles involved. These techniques include measurements of correlated observables, Bell inequality tests, and state tomography. These methods provide statistical evidence for entanglement rather than directly "reading" or observing the entanglement itself.
Researchers and scientists in the field of quantum physics employ specialized experimental setups and devices to perform these measurements. These setups often involve complex equipment, such as photon detectors, interferometers, and entanglement sources, to investigate and verify the presence of entanglement between particles.
It's worth noting that the field of quantum technology is rapidly advancing, and new developments may occur. Therefore, it's recommended to consult the latest research and advancements in quantum physics and quantum technology to stay updated on any potential progress in detecting and verifying quantum entanglement.