Entangling characterization of (SWAP)1/m and Controlled unitary gates

Details Entangling characterization of (SWAP)1/m and Controlled unitary gates Entangling characterization of (SWAP)1/m and Controlled unitary gates

2008-08-12

arxiv.org/abs/0808.1649v2

Phys. Rev. A 78, 052305 (2008)

Physics

Quantum Physics

12 pages, 1 figure, One more paragraph added in Introduction

Scientific paper

10.1103/PhysRevA.78.052305

We study the entangling power and perfect entangler nature of (SWAP)1/m, for
m>=1, and controlled unitary (CU) gates. It is shown that (SWAP)1/2 is the only
perfect entangler in the family. On the other hand, a subset of CU which is
locally equivalent to CNOT is identified. It is shown that the subset, which is
a perfect entangler, must necessarily possess the maximum entangling power.

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