Typical entanglement of stabilizer states

Details Typical entanglement of stabilizer states Typical entanglement of stabilizer states

2005-10-30

arxiv.org/abs/quant-ph/0510232v2

Phys. Rev. A 74, 062314 (2006)

Physics

Quantum Physics

Final version, to appear in PRA. 11 pages, 1 figure

Scientific paper

10.1103/PhysRevA.74.062314

How entangled is a randomly chosen bipartite stabilizer state? We show that if the number of qubits each party holds is large the state will be close to maximally entangled with probability exponentially close to one. We provide a similar tight characterization of the entanglement present in the maximally mixed state of a randomly chosen stabilizer code. Finally, we show that typically very few GHZ states can be extracted from a random multipartite stabilizer state via local unitary operations. Our main tool is a new concentration inequality which bounds deviations from the mean of random variables which are naturally defined on the Clifford group.

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