Sandu Popescu

Concentrating partial entanglement by local operations

If two separated observers are supplied with entanglement, in the form of n pairs of particles in identical partly entangled pure states, one member of each pair being given to ...

Purification of Noisy Entanglement and Faithful Teleportation via Noisy Channels

Two separated observers, by applying local operations to a supply of not-too-impure entangled states (e.g., singlets shared through a noisy channel), can prepare a smaller numbe...

Fundamental Problems in Quantum Theory

On the measure of entanglement for pure states

We point out a formal correspondence between thermodynamics and entanglement. By applying it to previous work, we show that entropy of entanglement is the unique measure of enta...