Abstract
Two component (spinor) Bose–Einstein condensates (BECs) are considered as the nodes of an interconnected quantum network. Unlike standard single-system qubits, in a BEC the quantum information is duplicated in a large number of identical bosonic particles, thus can be considered to be a ‘macroscopic’ qubit. One of the difficulties with such a system is how to effectively interact such qubits together in order to transfer quantum information and create entanglement. Here we propose a scheme of cavities containing spinor BECs coupled by optical fiber in order to achieve this task. We discuss entanglement generation and quantum state transfer between nodes using such macroscopic BEC qubits.
Highlights
Quantum networks have recently attracted much interest due to their potential applications in quantum computing, communication, metrology, and simulation [1, 2, 3].Quantum information is generated, stored and processed in individual quantum systems and connected via quantum channels
In this paper we show how to create a SizSjz entangling interaction between the nodes of the quantum network, which is fundamental to many tasks quantum information processing tasks described above
We have proposed a method for generating SizSjz interaction between two-component Bose-Einstein condensates (BECs) using a system of cavities coupled by optical fiber
Summary
Quantum networks have recently attracted much interest due to their potential applications in quantum computing, communication, metrology, and simulation [1, 2, 3]. The primary difference between such two-component BECs and other proposals for quantum information processing is in the nature of how qubit information is encoded physically. It was shown that tasks such as quantum teleportation is possible using BEC qubits [14] All of these protocols rely on the presence of a two qubit gate, most usually of the form SizSjz. Currently, no schemes for implementing such an interaction exist, works proposed originally for single atomic systems, such as Ref. In this paper we show how to create a SizSjz entangling interaction between the nodes of the quantum network, which is fundamental to many tasks quantum information processing tasks described above.
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