## Abstract

Advances in recent years have made it possible to explore quantum dots as a viable technology for scalable quantum information processing. Charge qubits for example can be realized in the lowest bound states of coupled quantum dots and the precision control of the confinement potential allows for the realization of a full set of universal qubit gates, including arbitrary single-qubit rotations and two-qubit C-NOT gates. In this work we describe a novel scheme for implementing quantum random walks on arbitrarily complex graphs by extending these elementary operations to the control of a two-dimensional quantum dot grid. As single-qubit rotations constitute the essential building blocks of our implementation scheme, we also present numerical simulations of one such mechanism by directly solving the corresponding time-dependent Schrödinger equation.

Original language | English |
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Title of host publication | Solid-State Quantum Computing - Proceedings of the 2nd International Workshop on Solid-State Quantum Computing, IWSSQC 2008 and Mini-School on Quantum Information Science, QIS 2008 |

Place of Publication | Melville, NY |

Publisher | American Institute of Physics |

Pages | 56-61 |

Number of pages | 6 |

Volume | 1074 |

ISBN (Electronic) | 9780735406056 |

DOIs | |

Publication status | Published - 2008 |

Externally published | Yes |

Event | 2nd International Workshop on Solid-State Quantum Computing, IWSSQC 2008 and Mini-School on Quantum Information Science, QIS 2008 - Taipei, Taiwan, Province of China Duration: 23 Jun 2008 → 27 Jun 2008 |

### Other

Other | 2nd International Workshop on Solid-State Quantum Computing, IWSSQC 2008 and Mini-School on Quantum Information Science, QIS 2008 |
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Country | Taiwan, Province of China |

City | Taipei |

Period | 23/06/08 → 27/06/08 |

## Keywords

- Cliarge qubits
- Quantum dynamics
- Quantum gates
- Quantum random walk