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Preparation and transfer of entanglement in atomic ensembles interacting with cavity fields

Xiong Yang, Hong‐Mei Zou

Optoelectronics LettersMar 1, 20101 citation

Entanglement transfer via the Raman atom-cavity-field interaction

Mai-Lin Liang, Yuan Bing

For the Raman interaction between an atom and a two-mode cavity field prepared in the state |01> or |10>, the atom and the field can be disentangled periodically. Such a property of Raman atom-field interaction allows the full entanglement transfer among many atoms and bimodal cavities. In the calculations, each atom is assumed to interact with its own cavity at a different time and so non-identical atoms can be treated conveniently. Entanglement sudden death is discussed too. Though atom-field interaction greatly changes the values of the concurrence for two atoms, configuration of the concurrence is almost not affected. When there is entanglement sudden death, atoms and cavities can still be entangled with one another. However, full entanglement transfer cannot be achieved for such systems with Raman atom-field interaction.For the Raman interaction between an atom and a two-mode cavity field prepared in the state |01> or |10>, the atom and the field can be disentangled periodically. Such a property of Raman atom-field interaction allows the full entanglement transfer among many atoms and bimodal cavities. In the calculations, each atom is assumed to interact with its own cavity at a different time and so non-identical atoms can be treated conveniently. Entanglement sudden death is discussed too. Though atom-field interaction greatly changes the values of the concurrence for two atoms, configuration of the concurrence is almost not affected. When there is entanglement sudden death, atoms and cavities can still be entangled with one another. However, full entanglement transfer cannot be achieved for such systems with Raman atom-field interaction.

Chinese Physics BSep 1, 20101 citation

Preparation of Entangled Atomic States Through Resonant Atom-Field Interaction

Chen, Mei-Feng

一个计划被建议因为二原子的格言联盟者的产生纠缠了状态，多原子格言联盟者纠缠了 W 班的状态。计划与一个单个模式的洞基于原子的同时的反响的相互作用删除。它不要求相互作用时间的精确调整。需要完成产生的时间不与原子的数字增加。

理论物理通讯：英文版Jan 1, 20060 citations

Multi-Atom Entanglement Engineering in Distant Cavities via Resonant Interaction

钟志荣

我们建议为为在三个远洞套住的多重原子的纠缠的状态的产生的一个计划由二相同单个模式的纤维连接了。与以前的计划相比，建议计划的明显的优点是：首先，在建议协议的所有洞能自由地与对方一起交往，它在量通讯和分布式的量计算是重要的。第二，在计划，原子，洞，和纤维，模式在回声。因此，要求的相互作用时间是短的，鉴于 decoherence，它是重要的。原则上，建议计划能被扩大产生 n 原子纠缠的状态。[从作者抽象]我们建议为为在三个远洞套住的多重原子的纠缠的状态的产生的一个计划由二相同单个模式的纤维连接了。与以前的计划相比，建议计划的明显的优点是：首先，在建议协议的所有洞能自由地与对方一起交往，它在量通讯和分布式的量计算是重要的。第二，在计划，原子，洞，和纤维，模式在回声。因此，要求的相互作用时间是短的，鉴于 decoherence，它是重要的。原则上，建议计划能被扩大产生 n 原子纠缠的状态。[从作者抽象]

Chinese Physics LettersJan 1, 20100 citations

Tripartite entanglement transfer from flying modes to localized qubits

Federico Casagrande, ALFREDO LULLI, Matteo G. A. Paris

We investigate the process of entanglement transfer from a three-mode quantized field to a system of three spatially separated qubits, each one made of a two-level atom resonantly coupled to a cavity mode. The optimal conditions for entanglement transfer, evaluated by atomic tripartite negativity, are derived for radiation prepared in qubitlike and Gaussian entangled states in terms of field parameters, atom-cavity interaction time, cavity mirror losses, and atomic preparation. For qubitlike states we find that for negligible cavity losses some states may completely transfer their entanglement to the atoms and/or be exactly mapped to the atomic state, whereas for Gaussian states we find a range of field parameters needed to obtain a large entanglement transfer. The purity of the three-qubit states and the entanglement of two-qubit subsystems are also discussed in some detail.We investigate the process of entanglement transfer from a three-mode quantized field to a system of three spatially separated qubits, each one made of a two-level atom resonantly coupled to a cavity mode. The optimal conditions for entanglement transfer, evaluated by atomic tripartite negativity, are derived for radiation prepared in qubitlike and Gaussian entangled states in terms of field parameters, atom-cavity interaction time, cavity mirror losses, and atomic preparation. For qubitlike states we find that for negligible cavity losses some states may completely transfer their entanglement to the atoms and/or be exactly mapped to the atomic state, whereas for Gaussian states we find a range of field parameters needed to obtain a large entanglement transfer. The purity of the three-qubit states and the entanglement of two-qubit subsystems are also discussed in some detail.

arXiv:0811.0497Physical Review AFeb 5, 200925 citations

Quantum manipulation of cavity fields using atomic coherence and entanglement = 원자 간섭성과 얽힘을 이용한 공동 장의 양자 제어

Ho-Joon Kim, 김호준

Jan 1, 20100 citations

Preparation and transfer of entanglement in atomic ensembles interacting with cavity fields

Abstract

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Preparation and transfer of entanglement in atomic ensembles interacting with cavity fields

Abstract

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