Efficiency of Entanglement Concentration by Photon Subtraction
W. Maimaiti, S. Mancini
TL;DR
This paper introduces a new efficiency measure for photon subtraction in entanglement concentration, demonstrating that iteration does not improve efficiency and proposing an adaptive protocol to significantly enhance it.
Contribution
The paper proposes a novel efficiency measure for photon subtraction protocols and introduces an adaptive method to improve entanglement concentration efficiency.
Findings
Iteration does not increase efficiency
Adaptive protocol significantly enhances efficiency
New measure provides better assessment of protocol performance
Abstract
We introduce a measure of efficiency for the photon subtraction protocol aimed at entanglement concentration on a single copy of bipartite continuous variable state. We then show that iterating the protocol does not lead to higher efficiency than a single application. In order to overcome this limit we present an adaptive version of the protocol able to greatly enhance its efficiency.
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