Creation of Stable Multipartite Entangled States in Spin Chains With Defects

Santos, Lea F.

doi:10.1142/s021974990600202x

Cited by 3 publications

(1 citation statement)

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“…The need for instantaneous measurement at specific times and the lack of generalization to systems with more qubits are the main disadvantages of such a method based on the natural evolution of spin chains. Other approaches used branched spin chains [14] or used engineered defects in an anisotropic spin chain [15] to generate W states. These approaches require individual addressing of spins and hence are not straightforward to implement.…”

Section: Introductionmentioning

confidence: 99%

Scalable engineering of multipartiteWstates in a spin chain

Balachandran

Gong

2012

Phys. Rev. A

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We propose a scalable scheme for engineering multipartite entangled W states in a Heisenberg spin chain. The rather simple scheme is mainly built on the accumulative angular squeezing technique first proposed in the context of quantum kicked rotor for focusing a rotor to a delta-like angular distribution [I. Sh. Averbukh and R. Arvieu, Phys. Rev. Lett. 87, 163601 (2001)]. We show how the efficient generation of various W states may be achieved by engineering the interaction between a spin chain (short or long) and a time-dependent parabolic magnetic field. Our results may further motivate the use of spin chains as a test bed to investigate complex properties of multipartite entangled states. We further numerically demonstrate that our scheme can be extended to engineer arbitrary spin chain quasimomentum states as well as their superposition states.

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Section: Introductionmentioning

confidence: 99%