McAleese Hannah, Paternostro Mauro
Centre for Quantum Materials and Technologies, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, UK.
Department of Physics and Chemistry-Emilio Segrè, University of Palermo, Via Archirafi 36, I-90123 Palermo, Italy.
Entropy (Basel). 2024 Sep 11;26(9):780. doi: 10.3390/e26090780.
We assess a scheme for measurement-free quantum teleportation from the perspective of the resources underpinning its performance. In particular, we focus on claims recently made about the crucial role played by the degree of non-Markovianity of the dynamics of the information carrier whose state we aim to teleport. We prove that any link between the efficiency of teleportation and the back-flow of information depends fundamentally on the way the various operations entailed by the measurement-free teleportation protocol are implemented while-in general-no claim of causal link can be made. Our result reinforces the need for the explicit assessment of the underlying physical platform when assessing the performance and resources for a given quantum protocol and the need for a rigorous quantum resource theory of non-Markovianity.
我们从支撑其性能的资源角度评估一种无测量量子隐形传态方案。特别地，我们关注最近关于信息载体动力学的非马尔可夫性程度所起关键作用的论断，我们旨在隐形传输该信息载体的状态。我们证明，隐形传态效率与信息回流之间的任何联系，从根本上取决于无测量隐形传态协议所涉及的各种操作的实施方式，而一般来说，不能断言存在因果联系。我们的结果强化了在评估给定量子协议的性能和资源时，对基础物理平台进行明确评估的必要性，以及对非马尔可夫性建立严格量子资源理论的必要性。
