Heisenberg Limit Phase Sensitivity in the Presence of Decoherence Channels

作者：Nosraty Farzam

来源：Communications in Theoretical Physics, 2016, 65(2): 225-230.

DOI：10.1088/0253-6102/65/2/225

• (non)Markovian process
• quantum fisher information
• quantum Cramer-Rao bound
• decoherence channels
• entangled states
• Heisenberg's limit
• phase sensitivity

In the present study, time evolution of quantum Cramer Rao bound of entangled NOON state, as phase sensitivity, is determined by the aid of quantum estimation theory in the presence decoherence channels. Also, the dynamic quantum process as decoherence approach is characterized by quantum fisher information flow and entanglement amount in order to distinguish between Markovian and Non-Markovian process. The comparison between quantum fisher information and quantum fisher information flow assists to comprehend the phase sensitivity evolution corresponding to Non-Markovian and Markovian process. Furthermore, as result of backflow of information from the environment to system, the phase sensitivity corresponding memory effect of environment are revived after complete decay and increase in the few times.

• 出版日期2016-2-1