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Deterministic construction of arbitrary $W$ states with quadratically increasing number of two-qubit gates

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arxiv 1606.09290 v3 pith:IJNZAEOD submitted 2016-06-28 quant-ph

classification quant-ph
keywords gatesstatetwo-qubitnumberarbitrarycircuitcnotfour
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We propose a quantum circuit composed of $cNOT$ gates and four single-qubit gates to generate a $W$ state of three qubits. This circuit was then enhanced by integrating two-qubit gates to create a $W$ state of four and five qubits. After a couple of enhancements, we show that an arbitrary $W$ state can be generated depending only on the degree of enhancement. The generalized formula for the number of two-qubit gates required is given, showing that an $n$-qubit $W$-state generation can be achieved with quadratically increasing number of two-qubit gates. Also, the practical feasibility is discussed regarding photon sources and various applications of $cNOT$ gates.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Inductive Construction of Variational Quantum Circuit for Constrained Combinatorial Optimization

    quant-ph 2025-01 conditional novelty 6.0 of 10

    A new inductive method constructs constraint-preserving variational quantum circuits by iteratively applying forwarding operations to subproblem ansatzes, demonstrated on assignment, shift scheduling, and facility location.

  2. TensorQC: Towards Scalable Distributed Quantum Computing via Tensor Networks

    cs.ET 2025-02 conditional novelty 5.0 of 10

    TensorQC replaces the expensive 4^|E| brute-force reconstruction of circuit cutting with tensor network contraction, achieving exponential savings in classical cost and large reductions in required QPU size and quality.

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