Entanglement Generation by Using the Moving Spin

양자얽힘 상태를 만들어내는 것은 매우 중요하다. 근거리에 있는 두 계를 양자얽힘 상태로 만드는 것은 그리 어렵지 않으나 직접 상호작용이 불가능 할 정도로 멀리 떨어져서 고정되어 있는 계들을 양자적으로 얽히게 하는 것은 어려운 문제 중의 하나다. 본 논문에서는 먼 거리에 떨어져있는 스핀-1/2입자들 사이에 양자얽힘 상태를 직접적인 상호작용이 아니라 제 삼의 스핀-l/2를 이용하여 생성할 수 있다는 것을 보였다. 상호작용으로는 $F\"{o}rster$ 상호작용과 스핀-스핀 교환 상호작용을 사용하였다. The generation of entanglement is a very important subject in the quantum computer. Here we suggest the method that generates entanglement between two spin-1/2 particles by using the third moving spin-1/2 particle. We use the $F\"{o}rster$ interaction and the exchange interaction to make the entangled state.양자얽힘 상태를 만들어내는 것은 매우 중요하다. 근거리에 있는 두 계를 양자얽힘 상태로 만드는 것은 그리 어렵지 않으나 직접 상호작용이 불가능 할 정도로 멀리 떨어져서 고정되어 있는 계들을 양자적으로 얽히게 하는 것은 어려운 문제 중의 하나다. 본 논문에서는 먼 거리에 떨어져있는 스핀-1/2입자들 사이에 양자얽힘 상태를 직접적인 상호작용이 아니라 제 삼의 스핀-l/2를 이용하여 생성할 수 있다는 것을 보였다. 상호작용으로는 $F\"{o}rster$ 상호작용과 스핀-스핀 교환 상호작용을 사용하였다. The generation of entanglement is a very important subject in the quantum computer. Here we suggest the method that generates entanglement between two spin-1/2 particles by using the third moving spin-1/2 particle. We use the $F\"{o}rster$ interaction and the exchange interaction to make the entangled state.

Journal of the Korean Magnetics SocietyFeb 28, 20070 citations

Motion generates entanglement

Nicolai Friis, David Edward Bruschi, Jorma Louko +1 more

We demonstrate entanglement generation between mode pairs of a quantum field in a single, rigid cavity that moves nonuniformly in Minkowski space-time. The effect is sensitive to the initial state, the choice of the mode pair and bosonic versus fermionic statistics, and it can be stronger by orders of magnitude than the entanglement degradation between an inertial cavity and a nonuniformly moving cavity. Detailed results are given for massless scalar and spinor fields in ( $1+1$ ) dimensions. By the equivalence principle, the results model entanglement generation by gravitational effects.We demonstrate entanglement generation between mode pairs of a quantum field in a single, rigid cavity that moves nonuniformly in Minkowski space-time. The effect is sensitive to the initial state, the choice of the mode pair and bosonic versus fermionic statistics, and it can be stronger by orders of magnitude than the entanglement degradation between an inertial cavity and a nonuniformly moving cavity. Detailed results are given for massless scalar and spinor fields in ($1+1$) dimensions. By the equivalence principle, the results model entanglement generation by gravitational effects.

arXiv:1201.0549Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fieldsApr 19, 201263 citations

Generation of Einstein-Podolsky-Rosen pairs and interconversion of static and flying electron spin qubits

G. Giavaras, J. H. Jefferson, M. Fearn +1 more

We propose a method of generating fully entangled electron spin pairs using an open static quantum dot and a moving quantum dot, realized by the propagation of a surface acoustic wave (SAW) along a quasi-one-dimensional channel in a semiconductor heterostructure. In particular, we consider a static dot (SD) loaded with two interacting electrons in a singlet state and demonstrate a mechanism which enables the moving SAW dot to capture and carry along one of the electrons, hence yielding a fully entangled static-flying pair. We also show how with the same mechanism we can load the SD with one or two electrons which are initially carried by a SAW-induced dot. The feasibility of realizing these ideas with existing semiconductor technology is demonstrated and extended to yield flying or static pairs that are fully entangled and arbitrary interconversion of static and flying electron spin qubits.We propose a method of generating fully entangled electron spin pairs using an open static quantum dot and a moving quantum dot, realized by the propagation of a surface acoustic wave (SAW) along a quasi-one-dimensional channel in a semiconductor heterostructure. In particular, we consider a static dot (SD) loaded with two interacting electrons in a singlet state and demonstrate a mechanism which enables the moving SAW dot to capture and carry along one of the electrons, hence yielding a fully entangled static-flying pair. We also show how with the same mechanism we can load the SD with one or two electrons which are initially carried by a SAW-induced dot. The feasibility of realizing these ideas with existing semiconductor technology is demonstrated and extended to yield flying or static pairs that are fully entangled and arbitrary interconversion of static and flying electron spin qubits.

arXiv:cond-mat/0702539Physical Review BDec 27, 20079 citations

F\"{o}rster

상호작용과 스핀-스핀 교환 상호작용을 사용하였다. The generation of entanglement is a very important subject in the quantum computer. Here we suggest the method that generates entanglement between two spin-1/2 particles by using the third moving spin-1/2 particle. We use the

F\"{o}rster

interaction and the exchange interaction to make the entangled state.

1+1

) dimensions. By the equivalence principle, the results model entanglement generation by gravitational effects.