entanglementsatelliittipohjaisia

entanglementsatelliittipohjaisia refers to the concept of using entangled quantum states to establish secure communication links via satellites. This technology leverages quantum entanglement, a phenomenon where two or more particles become linked in such a way that they share the same fate, regardless of the distance separating them. When one particle's state is measured, the state of the other(s) is instantaneously determined.

In the context of satellite-based entanglement, these entangled particles are generated on Earth or in orbit and then distributed between ground stations and satellites, or between two satellites. If one entangled particle is sent to a satellite and the other remains on the ground, measuring the particle on the ground instantly influences the state of the particle on the satellite. This property is fundamental to quantum key distribution (QKD), where the shared entangled states can be used to generate secret cryptographic keys.

The advantage of using satellites for entanglement distribution is the potential for global reach, overcoming the limitations of terrestrial fiber optic networks which are constrained by distance and infrastructure. Satellites can act as nodes in a quantum network, enabling secure communication over vast distances, including intercontinental links. Challenges in this field include maintaining the fragile entangled states during transmission through the atmosphere and space, as well as the precision required for pointing and tracking between ground stations and moving satellites. Research and development are ongoing to overcome these hurdles and realize a global quantum communication network.