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# Finite-Time Disentanglement via Spontaneous Emission

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### Abstract

We show that under the influence of pure vacuum noise two entangled qubits become completely disentangled in a finite time, and in a specific example we find the time to be given by $$\ln \Big(\frac{2 +\sqrt 2}{2}\Big)$$ times the usual spontaneous lifetime.

### Author and article information

###### Journal
28 April 2004
2004-09-09
###### Article
10.1103/PhysRevLett.93.140404
quant-ph/0404161