Radim Filip

TL;DR: This work proposes and experimentally addresses a continuous variable quantum key distribution protocol that uses modulated fragile entangled states of light to greatly enhance the robustness to channel noise and demonstrates that the resulting protocol can tolerate more noise than the benchmark set by the ideal continuous variable coherent state protocol.

TL;DR: In this article, the authors developed an experimental scheme based on a continuous-wave (cw) laser for generating arbitrary superpositions of photon number states, which are fully compatible with developed quantum teleportation and measurement-based quantum operations with cw lasers.

TL;DR: In this paper, the first time such "entanglement distillation" has been achieved for states of light that are entangled in continuous variables, which should help to increase the distance over which quantum information can be distributed.

TL;DR: In this paper, a quantum-state amplifier is demonstrated that can actually decrease uncertainty about the state's phase, which involves the addition of thermal noise, and it is shown that thermal noise can be used to improve the performance of the quantum state amplifier.

TL;DR: A method of fading discrimination and subsequent post-selection of the corresponding sub-states is introduced and it is shown that it can improve the entanglement resource and restore the security of the key distribution over a realistic fading link.