Protocols for Creating and Distilling Multipartite GHZ States With Bell Pairs
نویسندگان
چکیده
منابع مشابه
GHZ extraction yield for multipartite stabilizer states
Let |Ψ〉 be an arbitrary stabilizer state distributed between three remote parties, such that each party holds several qubits. Let S be a stabilizer group of |Ψ〉. We show that |Ψ〉 can be converted by local unitaries into a collection of singlets, GHZ states, and local one-qubit states. The numbers of singlets and GHZs are determined by dimensions of certain subgroups of S. For an arbitrary numbe...
متن کاملMulti-partite quantum cryptographic protocols with noisy GHZ States
We propose a wide class of distillation schemes for multi-partite entangled states that are CSS-states. Our proposal provides not only superior efficiency, but also new insights on the connection between CSS-states and bipartite graph states. We then apply our distillation schemes to the tri-partite case for three cryptographic tasks—namely, (a) conference key agreement, (b) quantum sharing of ...
متن کاملConcurrence for multipartite states
We construct a generalized concurrence for general multipartite states based on local W-class and GHZ-class operators. We explicitly construct the corresponding concurrence for three-partite states. The construction of the concurrence is interesting since it is based on local operators.
متن کاملExperimental violation of multipartite Bell inequalities with trapped ions.
We report on the experimental violation of multipartite Bell inequalities by entangled states of trapped ions. First, we consider resource states for measurement-based quantum computation of between 3 and 7 ions and show that all strongly violate a Bell-type inequality for graph states, where the criterion for violation is a sufficiently high fidelity. Second, we analyze Greenberger-Horne-Zeili...
متن کاملQuadratic bell inequalities as tests for multipartite entanglement.
This Letter presents quantum mechanical inequalities which distinguish, for systems of n spin- 1 / 2 particles ( n>2), between fully entangled states and states in which at most n-1 particles are entangled. These inequalities are stronger than those obtained by Gisin and Bechmann-Pasquinucci [Phys. Lett. A 246, 1 (1998)] and by Seevinck and Svetlichny [quant-ph/0201046].
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Quantum Engineering
سال: 2020
ISSN: 2689-1808
DOI: 10.1109/tqe.2020.3044179