Entangled SU(2) and SU(1,1) coherent states

Details Entangled SU(2) and SU(1,1) coherent states Entangled SU(2) and SU(1,1) coherent states

2000-01-20

arxiv.org/abs/quant-ph/0001073v1

J. Phys. A:Math.Gen. 33(2000)7451-7467.

Physics

Quantum Physics

31 pages, no figures

Scientific paper

10.1088/0305-4470/33/41/312

Entangled SU(2) and SU(1,1) coherent states are developed as superpositions of multiparticle SU(2) and SU(1,1) coherent states. In certain cases, these are coherent states with respect to generalized su(2) and su(1,1) generators, and multiparticle parity states arise as a special case. As a special example of entangled SU(2) coherent states, entangled binomial states are introduced and these entangled binomial states enable the contraction from entangled SU(2) coherent states to entangled harmonic oscillator coherent states. Entangled SU(2) coherent states are discussed in the context of pairs of qubits. We also introduce the entangled negative binomial states and entangled squeezed states as examples of entangled SU(1,1) coherent states. A method for generating the entangled SU(2) and SU(1,1) coherent states is discussed and degrees of entanglement calculated. Two types of SU(1,1) coherent states are discussed in each case: Perelomov coherent states and Barut-Girardello coherent states.

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