Bringing a Superposition $α|11> + β|00>$ ($α>β$) to a Bell State Through Quantum Zeno-like Measurements

Details Bringing a Superposition $α|11> + β|00>$ ($α>β$) to a Bell State Through Quantum Zeno-like Measurements Bringing a Superposition $α|11> + β|00>$ ($α>β$) to a Bell State Through Quantum Zeno-like Measurements

2008-05-21

arxiv.org/abs/0805.3325v2

Physics

Quantum Physics

Scientific paper

We show rather surprising features of Zeno-like measurements on two pairs of qubits system interacting pairwise. For the superposition state $\alpha|11> + \beta|00>$ ($\alpha >\beta$) and a finite set of measurements we find an entanglement enhancement. For $N\to\infty$ the initial state is preserved. Moreover we show that a single measurement after the "sudden death of entanglement" induces a new entangled state. For specific measurement times the entanglement will be maximum.

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