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Everything about Cluster state

Entangled state of qubits

In quantum information and quantum computing, a cluster state is a type of highly entangled state of multiple qubits. Cluster states are generated in lattices of qubits with Ising type interactions. A cluster C is a connected subset of a d-dimensional lattice, and a cluster state is a pure state of the qubits located on C. They are different from other types of entangled states such as GHZ states or W states in that it is more difficult to eliminate quantum entanglement in the case of cluster states. Another way of thinking of cluster states is as a particular instance of graph states, where the underlying graph is a connected subset of a d-dimensional lattice. Cluster states are especially useful in the context of the one-way quantum computer. For a comprehensible introduction to the topic see Briegel (2009). Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Cluster stateA 5-minute orientation
  2. Skim a recent paper: A comprehensive survey of clustering algorithms: State-of-the-art machine learning applications, taxonomy, challenges, and future research prospectsInfluential work since 2022
  3. Pick up a classic book: Theory of light hydrogenic bound statesThe most-reprinted book on the subject
  4. Read the landmark paper: Deterministic generation of a two-dimensional cluster stateCited 427 times
  5. Go sideways: Graph stateA closely related topic
  6. Go sideways: Mølmer–Sørensen gateA closely related topic

📖 Definitions

Noun Any of a subset of graph states that can be fitted to a regular cubic lattice

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🆕 Influential since 2022

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