Loss Creates Order: The Quantum Dance of Photons ⚡ экспресс
Decoherence is usually seen as an obstacle for quantum computing. However, this work demonstrates an example where dissipative coupling through a common reservoir with high losses is used to create quantum interference among multiple photons. The experiment was carried out on a thin-film lithium niobate chip: two spontaneous parametric down-conversion sources are incoherently connected through a common channel with high attenuation. The result is correlated multi-photon states (from two to four photons) with the ability to control the degree of correlation by shifting the relative phase between the pumps. The findings show that losses and decoherence can act as resources for quantum information processing, pointing to a promising research direction.
Two pendulums on a stable table swing independently. If you place them on a shaky surface, vibrations synchronize their motion. The same principle worked on a silicon chip with photons.
Scientists created two sources of light that emit pairs of particles. The beams were directed into a common channel filled with interference and losses—killers of quantum effects. But instead of destruction, a stable connection emerged: photons from different arms began to behave synchronously, like pendulums on a shared shaky base. The synchronization could be controlled by shifting the phase of the reference beam—analogous to adjusting the shakiness.
The paradox: the stronger the disorder, the more robust the connection became—up to a certain limit. This discovery flips the approach: instead of fighting flaws, they can be harnessed to work.
🎯 The most unexpected: the stronger the interference, the more robust the quantum connection became—up to a certain limit. The destroyer played the role of a builder.
🎬 The idea recalls phasers from 'Star Trek': sometimes destructive energy can be redirected to useful purposes.