One-way deficit of SU(2) invariant states
arXiv:1307.3468 · doi:10.1016/S0034-4877(14)60038-0
Abstract
We calculate analytically the one-way deficit for systems consisting spin- and spin- subsystems with SU(2) symmetry. Comparing our results with the quantum discord of SU(2) invariant states, we show that the one-way deficit is equal to the quantum discord for half-integer , and is larger than the quantum discord for integer . Moreover, we also compare the one-way deficit with entanglement of formation. The quantum entanglement tends to zero as increases, while the one-way deficit can remain significantly large.
10 pages, 6 figures
References in corpus (12)
- Necessary and sufficient condition for non-zero quantum discord
- No-local-broadcasting theorem for quantum correlations
- Quantum discord and geometry for a class of two-qubit states
- Quantum discord bounds the amount of distributed entanglement
- Quantum cost for sending entanglement
- Correlations in local measurements on a quantum state, and complementarity as an explanation of nonclassicality
- Experimentally Witnessing the Quantumness of Correlations
- Entanglement in SO(3)-invariant bipartite quantum systems
- Entanglement in SU(2)-invariant quantum systems: The positive partial transpose criterion and others
- State space structure and entanglement of rotationally invariant spin systems
- Quantum discord of SU(2) invariant states
- Relative entropy of entanglement of rotationally invariant states