Parallel Quantum Computing in a Single Ensemble Quantum Computer

Details Parallel Quantum Computing in a Single Ensemble Quantum Computer Parallel Quantum Computing in a Single Ensemble Quantum Computer

2003-07-08

arxiv.org/abs/quant-ph/0307055v1

Physical Review A 69, 052303 (2004)

Physics

Quantum Physics

4 pages, no figure

Scientific paper

10.1103/PhysRevA.69.052303

We propose a parallel quantum computing mode for ensemble quantum computer. In this mode, some qubits can be in pure states while other qubits in mixed states. It enables a single ensemble quantum computer to perform $"$single-instruction-multi-data" type of parallel computation. In Grover's algorithm and Shor's algorithm, parallel quantum computing can provide additional speedup. In addition, it also makes a fuller use of qubit resources in an ensemble quantum computer. As a result, some qubits discarded in the preparation of an effective pure state in the Schulman-Varizani, and the Cleve-DiVincenzo algorithms can be re-utilized.

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