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NATO science series. Series II, Mathematics, physics and chemistry

Entanglement in Quantum Information Processing

Samuel L. Braunstein

Published Jan 1, 2005• 1 citation
Publisher
DOI
10.1007/1-4020-3283-8_3

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Entanglement dynamics plays a crucial role in the development of scalable quantum information processing architectures. Quantum networks, composed of interconnected quantum nodes, offer promising avenues for the distribution and manipulation of quantum information over long distances. In this paper, we investigate the dynamics of entanglement in quantum networks and explore strategies for achieving scalable quantum information processing. the generation, distribution, and preservation of entanglement in various network topologies and investigate the impact of noise and decoherence on entanglement dynamics. Furthermore, we discuss potential applications of entanglement in quantum communication, cryptography, and computation, highlighting the importance of understanding and controlling entanglement dynamics for realizing practical quantum technologies. Through theoretical analysis and numerical simulations, we provide insights into the challenges and opportunities associated with entanglement dynamics in quantum networks, paving the way towards scalable quantum information processing architectures.
Quantum entanglements are of fundamental importance in quantum physics ranging from the quantum information processing to the physics of black hole. Here, we show that the quantum entanglement is not invariant in special relativity. This suggests that nearly all aspects of quantum information processing would be affected significantly when relativistic effects are considered because present schemes are based on the general assumption that entanglement is invariant. There should be additional protocols to compensate the variances of entanglement in in quantum information processing. Furthermore, extending our results to general relativity may provide clues to the fate of the information contained in an entangled Hawking pair inside and outside the event horizon as black hole evaporates.
Entanglement swapping is not only one of the core resources of quantum information processing, but also the backbone of long-distance quantum communication and quantum networks. Naturally, quantum information processing schemes based on entanglement swapping, such as quantum cryptography protocols and quantum algorithms, are more adaptable to quantum network environments. In this paper, we achieve quantum anonymous computation through entanglement swapping, the basic idea of which comes from our previous work [2019, Quantum Information Processing, 18(6), 168]. We propose two quantum anonymous computation protocols, in which entanglement swapping plays a crucial role in transmitting information and enhancing information security.