منابع مشابه
Multi-partite entanglement, communication complexity and quantum Helly-type theorems
We develop protocols for preparing the GHZ state (a pure tri-partite maximally entangled state) and, in general, a pure n-partite maximally entangled state using EPR pairs shared amongst n agents and classical communication between the agents. We observe that the combinatorial arrangement of EPR pairs required for this purpose is like that in Helly-type theorems in geometry. PACS numbers: 03.65...
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Quantum entanglement plays a key role in quantum information theory. In recent years, there has been a lot of efforts to characterize the entanglement of quantum states both qualitatively and quantitatively. Entangled states can be generated from disentangled states by the action of a non-local Hamitonians. That means these Hamiltonians have the ability to entangle quantum states. It is therefo...
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We show how to make event-ready multi-partite entanglement between qubits which may be encoded on photons or matter systems. Entangled states of matter systems, which can also act as single photon sources, can be generated using the entangling operation presented in quant-ph/0408040. We show how to entangle such sources with photon qubits, which may be encoded in the dual rail, polarization or ...
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Abstract We give a direct tensor decomposition for any density matrix into Hermitian operators. Based upon the decomposition we study when the mixed states are separable and generalize the separability indicators to multi-partite states and show that a density operator is separable if and only if the separable indicator is non-negative. We then derive two bounds for the separable indicator in t...
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ژورنال
عنوان ژورنال: Journal of the Korean Magnetics Society
سال: 2006
ISSN: 1598-5385
DOI: 10.4283/jkms.2006.16.1.088