Robust and fast geometric quantum computation with multiqubit gates in cavity QED

Autor:	Gong-Wei Lin, Xu-Bo Zou, Guang-Can Guo, Xiu-Min Lin
Rok vydání:	2009
Předmět:	Physics Quantum circuit Quantum network Computer Science::Emerging Technologies Quantum gate Quantum error correction Quantum mechanics Quantum electrodynamics Cavity quantum electrodynamics Quantum Fourier transform Quantum algorithm Atomic and Molecular Physics and Optics Quantum computer
Zdroj:	Physical Review A. 79
ISSN:	1094-1622 1050-2947
DOI:	10.1103/physreva.79.064303
Popis:	A scheme is proposed for realizing geometric quantum computation with one-qubit unitary gates and $N$-qubit $(N\ensuremath{\ge}2)$ phase gates in cavity QED. In the scheme, the cavity field and excited states are virtually excited by controlling appropriately atom-field couplings and engineering adiabatic passage; thus the gate operations are insensitive to the cavity decay and the atomic spontaneous emission. Furthermore, the $N$-qubit $(N\ensuremath{\ge}2)$ geometric phase gates can be realized just by one step and the required time does not increase with the number of qubits, which can significantly reduce complexity of physical realization of practical quantum computation and quantum algorithms.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7ee454ca25bcb1f88689e047967b08ec https://doi.org/10.1103/physreva.79.064303 Zobrazit plný text záznamu