What is Bipartite Coherence? Exploring 2-Electron Examples

[Plankton]

Hello,
i read about "Bipartite Coherence". In different Papers e.g. http://quantumcorrelations.weebly.com/uploads/6/6/5/5/6655648/2015_badhonnef_activations_cde.pdf or https://arxiv.org/abs/1611.00413

Can someone explain it a little bit? Maybe with an example with 2 Electrons that are described as one state of "bipartite coherence".

 

[eljose79]

Sure, I'd be happy to explain bipartite coherence for you. Bipartite coherence is a quantum phenomenon that describes the correlation between two subsystems in a quantum system. In simpler terms, it refers to the presence of quantum coherence between two separate parts of a larger quantum system.

To better understand this concept, let's use your example of two electrons. In classical physics, we can describe the state of two electrons as either being in a parallel or antiparallel spin state. However, in quantum mechanics, the state of the two electrons cannot be described in this simple way. Instead, we must use a mathematical representation called a wave function.

In the case of bipartite coherence, the wave function of the two electrons would be described as a superposition of states, meaning that the electrons are in a combination of both parallel and antiparallel spin states at the same time. This superposition of states is what we call bipartite coherence.

One way to think about this is to imagine the two electrons as being entangled, meaning that their quantum states are connected even if they are physically separated. This entanglement results in the bipartite coherence between the two electrons.

So why is this important? Well, bipartite coherence plays a crucial role in quantum information processing and quantum computing. By utilizing the coherence between two subsystems, we can perform complex quantum operations and calculations that would not be possible with classical systems.

I hope this explanation helps to clarify the concept of bipartite coherence for you. If you have any further questions, please feel free to ask.