AI Article Synopsis
- Scientists have come up with a way to create a special type of quantum state, called a GHZ state, using three atoms that are in separate spaces.
- They can do this in one simple step by using a method called quantum Zeno dynamics and controlling the atoms with light.
- This technique also works well even when things like noise and light loss happen, and it could be used to create even more complex quantum connections in the future.
Article Abstract
By using quantum Zeno dynamics, we propose a controllable approach to deterministically generate tripartite GHZ states for three atoms trapped in spatially separated cavities. The nearest-neighbored cavities are connected via optical fibers and the atoms trapped in two ends are tunably driven. The generation of the GHZ state can be implemented by only one step manipulation, and the EPR entanglement between the atoms in two ends can be further realized deterministically by Von Neumann measurement on the middle atom. Note that the duration of the quantum Zeno dynamics is controllable by switching on/off the applied external classical drivings and the desirable tripartite GHZ state will no longer evolve once it is generated. The robustness of the proposal is numerically demonstrated by considering various decoherence factors, including atomic spontaneous emissions, cavity decays and fiber photon leakages, etc. Our proposal can be directly generalized to generate multipartite entanglement by still driving the atoms in two ends.
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| http://dx.doi.org/10.1364/OE.20.013440 | DOI Listing |
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