Quantum metrology: Heisenberg limit with bound entanglement
Łukasz Czekaj, Anna Przysiężna, Michał Horodecki, Paweł Horodecki · Physical Review A · 2015
Which general properties of entangled quantum states are relevant for quantum metrology? As well as showing that enhanced accuracy is not fundamentally related to nonlocality and distillability, the authors are able to demonstrate that tools from quantum metrology may serve as a powerful witness of entanglement.