Quantum Repeater using Two-Mode Squeezed States and Atomic Noiseless Amplifiers

• URL: http://arxiv.org/abs/2211.16343v1
• Date: Mon, 28 Nov 2022 13:49:02 GMT
• Title: Quantum Repeater using Two-Mode Squeezed States and Atomic Noiseless Amplifiers
• Authors: Anders J. E. Bjerrum and Jonatan B. Brask and Jonas S. Neergaard-Nielsen and Ulrik L. Andersen
• Abstract summary: We study how a two-mode squeezed vacuum state can be stored and purified using noiseless amplification with a collection of solid-state qubits. The proposed method may be used to probabilistically increase the entanglement between the two parties sharing the state. We explore two different applications, the generation of entangled many-qubit registers, and the construction of quantum repeaters for long-distance quantum key distribution.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: We perform a theoretical investigation into how a two-mode squeezed vacuum state, that has undergone photon loss, can be stored and purified using noiseless amplification with a collection of solid-state qubits. The proposed method may be used to probabilistically increase the entanglement between the two parties sharing the state. The proposed amplification step is similar in structure to a set of quantum scissors. However, in this work the amplification step is realized by a state transfer from an optical mode to a set of solid-state qubits, which act as a quantum memory. We explore two different applications, the generation of entangled many-qubit registers, and the construction of quantum repeaters for long-distance quantum key distribution.

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