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Entanglement under restricted operations: Analogy to mixed-state entanglement
Stephen D. Bartlett, Andrew C. Doherty, Robert W. Spekkens +1
We show that the classification of bi-partite pure entangled states when local quantum operations are restricted yields a structure that is analogous in many respects to that of mi…
Optimal Unravellings for Feedback Control in Linear Quantum Systems
H. M . Wiseman, A. C. Doherty
For quantum systems with linear dynamics in phase space much of classical feedback control theory applies. However, there are some questions that are sensible only for the quantum…
Energy as an Entanglement Witness for Quantum Many-Body Systems
Mark R. Dowling, Andrew C. Doherty, Stephen D. Bartlett
We investigate quantum many-body systems where all low-energy states are entangled. As a tool for quantifying such systems, we introduce the concept of the entanglement gap, which…
Detecting multipartite entanglement
Andrew C. Doherty, Pablo A. Parrilo, Federico M. Spedalieri
We discuss the problem of determining whether the state of several quantum mechanical subsystems is entangled. As in previous work on two subsystems we introduce a procedure for ch…
On the distributed compression of quantum information
Charlene Ahn, Andrew Doherty, Patrick Hayden +1
We consider the problem of distributed compression for correlated quantum sources. The classical version of this problem was solved by Slepian and Wolf, who showed that distributed…