Entanglement changing power of two-qubit unitary operations

Details Entanglement changing power of two-qubit unitary operations Entanglement changing power of two-qubit unitary operations

2004-03-23

arxiv.org/abs/quant-ph/0403163v1

Phys. Rev. A 70, 022326 (2004)

Physics

Quantum Physics

11 pages

Scientific paper

10.1103/PhysRevA.70.022326

We consider a two-qubit unitary operation along with arbitrary local unitary operations acts on a two-qubit pure state, whose entanglement is C_0. We give the conditions that the final state can be maximally entangled and be non-entangled. When the final state can not be maximally entangled, we give the maximal entanglement C_max it can reach. When the final state can not be non-entangled, we give the minimal entanglement C_min it can reach. We think C_max and C_min represent the entanglement changing power of two-qubit unitary operations. According to this power we define an order of gates.

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