Naresh Sharma, Naqueeb Ahmad Warsi
A unified approach to prove the converses for the quantum channel capacity theorems is presented. These converses include the strong converse theorems with error exponents and novel explicit upper bounds on the fidelity measures reminiscent of the Wolfowitz strong converse for the classical channel capacity theorems. A long standing problem in quantum information theory has been to find out the strong converse for the channel capacity theorem when quantum information is sent across the quantum channel. We do so in this paper by giving the quantum error exponent and prove the strong converse for inputs unentangled across channel uses for a quantum degradable channel.
View original:
http://arxiv.org/abs/1205.1712
No comments:
Post a Comment