2023-08-28 06:00:14
Scientists have just achieved an unprecedented feat in quantum visualization. Thanks to a new technique, two entangled photons were revealed in real time in the form of a “yin-yang” symbol, emblematic of duality. This feat might revolutionize the speed of future quantum measurements.
Reconstruction of a holographic image of two entangled photons.
Image: Nature Photonics, Zia et al.
Quantum entanglement, which Albert Einstein (Albert Einstein (born March 14, 1879, Ulm, Württemberg, and died on…) once described as “frightening action at a distance”, strangely binds two particles, so that a modification of one immediately brings regarding a change in the other, whatever the distance which separates them.
Precisely defining a quantum object requires knowing its wave function (A wave is the propagation of a disturbance producing a variation in its path…). This description of its state includes all the possible values ​​that a photon (In particle physics, the photon is the mediating elementary particle of the interaction…) can adopt. However, entanglement complicates the determination of the wave function of two connected particles, since measuring one results in an instantaneous change in the other.
Traditionally, physicists circumvented this complexity with quantum tomography. This method consists of measuring a specific property, such as polarization (the polarization of electromagnetic waves; the polarization due to moments…), everything (The whole understood as a set of what exists is often interpreted as the world or… ) by isolating (An insulator is a material which makes it possible to prevent the exchanges of energy between two systems….) other factors. Although this technique provides valuable information, it requires many measurements and generates many “rogue” states.
To overcome this obstacle, the researchers used holography. In this method, the entangled photons are captured thanks to an interference pattern (In wave mechanics, we speak of interference when two waves of the same type…) that they create with a known state. The resulting image, captured by an ultra-precise camera, reveals the “yin-yang” pattern of the two entangled photons.
Alessio D’Errico, co-author of the study and postdoctoral researcher at the University (A university is an institution of higher learning whose objective is the…) of Ottawa, pointed out that this technique is well faster than previous methods, reducing the measurement time (Time is a concept developed by humans to understand the…) of several days (The day or the day is the interval between sunrise and sunset du Soleil; c’est la…) a few minutes (Primary form of a document: Law: a minute is the original of an act. …) or seconds.
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