Discover More: Center stage for quantum mechanical entanglement in an attosecond laser laboratory

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Center stage for 

quantum mechanical entanglement 

in an 

attosecond laser laboratory 

Date Posted: 15th February 2022



Quantum objects can show both - wave and particle-like behaviour. They can also interfere and occur as quantum superpositions. 

Local realism is a quick way of saying two principles: 1) Principle of locality: the cause of a physical change must be local. That is, a thing is changed only if it is touched, and 2) Principle of realism: Properties of objects are real and exist in our physical universe independent of our minds. 

Quantum-mechanical entanglement represents introduces the existence of non-locality, implying that the outcomes of measurements on an object A ("Alice") can be influenced by measurements on an object B ("Bob"), without there being any interaction between objects A and B.

Entanglement naturally arises when a quantum system is split into two sub-systems.

The wave function of the total system can be written as a sum of one or more product wave functions describing the individual parts. If the wavefunction can be written as just a single product, then measurements that are performed on part A ("Alice") do not affect measurements that are performed on part B ("Bob"). However, if the wavefunction of the composite system can only be written as a sum of such products, then the system is entangled and the remarkable result emerges that measurements on "Bob" (with different outcomes possible according to the quantum-mechanical probability of each of these outcomes) will determine the outcome of subsequent measurements on "Alice," even if "Alice" and "Bob" do not interact.

What would happen if we performed this phenomenon in an attosecond laser laboratory? Don't forget to read more on phys.org!

Source: Forschungsverbund Berlin e.V. (FVB) (on phys.org)

Read More: Click here! (phys.org)

Citation:

staff, S. X. (2022, January 28). Center stage for quantum mechanical entanglement in an attosecond laser laboratory. Phys.org; Phys.org. https://phys.org/news/2022-01-center-stage-quantum-mechanical-entanglement.html

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