A quantum ‘tele-amplification’ scheme that combines teleportation and the noiseless amplification of a coherent state is demonstrated by using Schrödinger-cat states prepared by photon subtraction from squeezed vacuum as an entanglement resource. This scheme can realize high-capacity communication, thus beating the homodyne limit of optical communications.
- Jonas S. Neergaard-Nielsen
- Yujiro Eto
- Masahide Sasaki
