Abstract
We propose a mechanism for perfect entanglement transport in anti-ferromagnetic (AFM) quantum spin chain systems with modulated exchange coupling and also for the modulation of on-site magnetic field. We use the principle of adiabatic quantum pumping process for entanglement transfer in the spin chain systems. We achieve the perfect entanglement transfer over an arbitrarily long distance and a better entanglement transport for longer AFM spin chain system than for the ferromagnetic one. We explain analytically and physically—why the entanglement hops in alternate sites. We find the condition for blocking of entanglement transport even in the perfect pumping situation. Our analytical solution interconnects quantum many body physics and quantum information science.
Highlights
Quantum communication between distant co-ordinates in a quantum network is an important requirement for quantum computation and information
We propose a mechanism for perfect entanglement transport in anti-ferromagnetic (AFM) quantum spin chain systems with modulated exchange coupling and for the modulation of on-site magnetic field
We find the condition for blocking of entanglement transport even in the perfect pumping situation
Summary
Quantum communication between distant co-ordinates in a quantum network is an important requirement for quantum computation and information. The potentiality of the spin chain system—antiferromagnetic (AFM) and ferromagnetic (FM)—as a network of quantum state and entanglement transport has already been studied by many groups as referred in the literature [7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22]. In this study we calculate the current of this spin transport, which transports a spin from one end of the chain to the other and as a result of which entanglement is transported (because the spin 0 and 0 are singlet and monogonus in nature) from one side to the other This quantization is topologically protected against the other perturbation as long as the gap along the loop remains finite [27,28].
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