182 citations · 351 across the 4 of their papers we have counts for
6 papers
Heisenberg-limited metrology with information recycling
Simon A. Haine, Stuart S. Szigeti, Matthias D. Lang +1
Information recycling has been shown to improve the sensitivity of atom interferometers by exploiting atom-light entanglement. In this paper, we apply information recycling to an i…
Optimal Quantum-Enhanced Interferometry
Matthias D. Lang, Carlton M. Caves
We analyze the ultimate bounds on the phase sensitivity of an interferometer, given the constraint that the state input to the interferometer's initial 50:50 beamsplitter is a…
Mixing nonclassical pure states in a linear-optical network almost always generates modal entanglement
Zhang Jiang, Matthias D. Lang, Carlton M. Caves
In quantum optics a pure state is considered classical, relative to the statistics of photodetection, if and only if it is a coherent state. A different and newer notion of nonclas…
Optimal quantum-enhanced interferometry using a laser power source
Matthias D. Lang, Carlton M. Caves
We consider an interferometer powered by laser light (a coherent state) into one input port and ask the following question: what is the best state to inject into the second input p…
Entropic measures of nonclassical correlations
Matthias D. Lang, Carlton M. Caves, Anil Shaji
A framework for categorizing entropic measures of nonclassical correlations in bipartite quantum states is presented. The measures are based on the difference between a quantum ent…
Quantum Discord and the Geometry of Bell-Diagonal States
Matthias D. Lang, Carlton M. Caves
The set of Bell-diagonal states for two qubits can be depicted as a tetrahedron in three dimensions. We consider the level surfaces of entanglement and quantum discord for Bell-dia…