Entanglement of mixed macroscopic superpositions: An entangling-power study

Journal Article · Sun Jan 15 00:00:00 EST 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.73.0· OSTI ID:20786683

Paternostro, M; Kim, M S ^[1]; Jeong, H ^[2]

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1. School of Mathematics and Physics, The Queen's University, Belfast, BT7 1NN (United Kingdom)
2. Center for Quantum Computer Technology, Department of Physics, University of Queensland, St. Lucia, Qld 4072 (Australia)

We investigate entanglement properties of a recently introduced class of macroscopic quantum superpositions in two-mode mixed states. One of the tools we use in order to infer the entanglement in this non-Gaussian class of states is the power to entangle a qubit system. Our study reveals features which are hidden in a standard approach to entanglement investigation based on the uncertainty principle of the quadrature variables. We briefly describe the experimental setup corresponding to our theoretical scenario and a suitable modification of the protocol which makes our proposal realizable within the current experimental capabilities.

• OSTI ID: 20786683
• Journal Information: Physical Review. A, Vol. 73, Issue 1; Other Information: DOI: 10.1103/PhysRevA.73.012338; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ENERGY LEVELS
MIXED STATE
QUADRATURES
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
QUBITS
UNCERTAINTY PRINCIPLE