Verschränkungszustand

Verschränkungszustand is a German term that translates to "entangled state" in English and refers to a phenomenon in quantum mechanics. It describes a special correlation between two or more quantum particles, such as photons or electrons. When particles are in an entangled state, their fates are linked in such a way that they cannot be described independently of each other, even when separated by large distances.

This means that measuring a property of one entangled particle instantaneously influences the state of the other particle(s), regardless of the distance between them. This seemingly paradoxical connection was famously described by Albert Einstein as "spooky action at a distance." The entanglement is a purely quantum mechanical effect and has no classical analogue.

The concept of Verschränkungszustand is fundamental to quantum information science, including quantum computing and quantum cryptography. Quantum computers leverage entanglement to perform computations that are intractable for classical computers. Quantum cryptography uses entanglement to create secure communication channels, as any attempt to eavesdrop would disturb the entangled state and be detectable. The mathematical description of entangled states involves non-separable quantum states.