摘要
Entanglement is an essential hallmark of quantumness.In a sense,almost all composite quantum systems are entangled.Entanglement can occur in any quantum system(even in macroscopic realms),regardless of whether they are separate systems or separate DOFs of a single system.Based on the Skyrme model,we show that a baryon is entangled in its spin and isospin degrees of freedom(DOFs)[1]and in the mode bases of the Fock space,in much the same way as the mode entanglements of the single-particle atomic and optical systems.
基金
National Natural Science Foundation of China(11105188,11047141)。
