Fundamental Limitations on Communication over a Quantum Network
- URL: http://arxiv.org/abs/2306.04983v1
- Date: Thu, 8 Jun 2023 07:13:42 GMT
- Title: Fundamental Limitations on Communication over a Quantum Network
- Authors: Junjing Xing, Tianfeng Feng, Zhaobing Fan, Haitao Ma, Kishor Bharti,
Dax Enshan Koh, Yunlong Xiao
- Abstract summary: Entanglement, a fundamental feature of quantum mechanics, has long been recognized as a valuable resource in enabling secure communications.
We propose a framework for investigating entanglement across multiple time points, termed temporal entanglement.
We show that the performance of a quantum network in transmitting information is inherently dependent on its temporal entanglement.
- Score: 1.9241821314180374
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Entanglement, a fundamental feature of quantum mechanics, has long been
recognized as a valuable resource in enabling secure communications and
surpassing classical limits. However, previous research has primarily
concentrated on static entangled states generated at a single point in time,
overlooking the crucial role of the quantum dynamics responsible for creating
such states. Here, we propose a framework for investigating entanglement across
multiple time points, termed temporal entanglement, and demonstrate that the
performance of a quantum network in transmitting information is inherently
dependent on its temporal entanglement. Through case studies, we showcase the
capabilities of our framework in enhancing conventional quantum teleportation
and achieving exponential performance growth in the protocol of quantum
repeaters. Additionally, our framework effectively doubles the communication
distance in certain noise models. Our results address the longstanding question
surrounding temporal entanglement within non-Markovian processes and its impact
on quantum communication, thereby pushing the frontiers of quantum information
science.
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