22 citations · 31 across the 4 of their papers we have counts for
4 papers
Quantum Key Distribution with Vacua or Dim Pulses as Decoy States
Hoi-Kwong Lo
Recently, Hwang has proposed a decoy state method in quantum key distribution (QKD). In Hwang's proposal, the average photon number of the decoy state is about two. Here, we propos…
Phase randomization improves the security of quantum key distribution
Hoi-Kwong Lo, John Preskill
Ideal quantum key distribution (QKD) protocols call for a source that emits single photon signals, but the sources used in typical practical realizations emit weak coherent states…
Getting Something Out of Nothing
Hoi-Kwong Lo
We study quantum key distribution with standard weak coherent states and show, rather counter-intuitively, that the detection events originated from vacua can contribute to secure…
Why Quantum Information Processing
Hoi-Kwong Lo
In this brief note, I will consider the following questions: (1) What is QIP? (2) Why QIP is interesting? (3) What QIP can do? (4) What QIP cannot do? (5) What are the major challe…