Quantum steering is the ability to remotely prepare different quantum states by using entangled pairs as a resource. Very recently, the concept of steering has been quantified with the use of inequalities, leading to substantial applications in quantum information and communication science. Here, we highlight that there exists a natural temporal analog of the steering inequality when considering measurements on a single object at different times. We give nontrivial operational meaning to violations of this temporal inequality by showing that it is connected to the security bound in the Bennett-Brassard 1984 protocol and thus may have applications in quantum communication.
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - 2014 Mar 10|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics