Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

International Conference on Quantum Information

A universal set of quantum gates on trapped ions in a decoherence-free subspace

Hartmut Häffner, Kihwan Kim, Thomas Monz, Alessandro S. Villar, Philipp Schindler, Michael Chwalla, Mark Riebe, Markus Hennrich, W. Hänsel, R. Blatt

Published Jan 1, 2008• 0 citations
Publisher

Abstract

Pairs of trapped ions can store quantum information four orders of magnitude longer than single ions. We will discuss the realization of a universal set of quantum gates acting on such a decoherence-free suspace.
DOI
10.1364/icqi.2008.qwa1

Related papers

Universal quantum logic gates in decoherence-free subspace with atoms trapped in distant cavities

Shi‐Biao Zheng

Science China Physics Mechanics and Astronomy•Jul 19, 2012•9 citations

Realization of Universal Ion-Trap Quantum Computation with Decoherence-Free Qubits

Thomas Monz, Kihwan Kim, Alessandro S. Villar +8 more

Any residual coupling of a quantum computer to the environment results in computational errors. Encoding quantum information in a so-called decoherence-free subspace provides means to avoid these errors. Despite tremendous progress in employing this technique to extend memory storage times by orders of magnitude, computation within such subspaces has been scarce. Here, we demonstrate the realization of a universal set of quantum gates acting on decoherence-free ion qubits. We combine these gates to realize the first controlled-NOT gate towards a decoherence-free, scalable quantum computer.

arXiv:0909.3715•Physical Review Letters•Nov 13, 2009•102 citations

Decoherence Suppression in Multi-qubit Quantum Gates with Trapped Ions by Control of the Driving Field

Pak Hong Leung

Bulletin of the American Physical Society•Mar 16, 2017•0 citations

Holonomic Quantum Computation in Decoherence-Free Subspaces

Lian-Ao Wu, Paolo Zanardi A, Daniel A. Lidar

We show how to realize, by means of non-Abelian quantum holonomies, a set of universal quantum gates acting on decoherence-free subspaces and subsystems. In this manner we bring together the quantum coherence stabilization virtues of decoherence-free subspaces and the fault tolerance of all-geometric holonomic control. We discuss the implementation of this scheme in the context of quantum information processing using trapped ions and quantum dots.

arXiv:quant-ph/0506086•Physical Review Letters•Sep 22, 2005•147 citations

How to realize a universal quantum gate with trapped ions

Ferdinand Schmidt‐Kaler, Hartmut Häffner, S. Gulde +8 more

arXiv:quant-ph/0312162•Applied Physics B•Dec 1, 2003•142 citations

A Decoherence-Free Quantum Memory Using Trapped Ions

D. Kielpinski, V. Meyer, M. A. Rowe +4 more

We demonstrate a decoherence-free quantum memory of one qubit. By encoding the qubit into the decoherence-free subspace (DFS) of a pair of trapped 9Be+ ions, we protect the qubit from environment-induced dephasing that limits the storage time of a qubit composed of a single ion. We measured the storage time under ambient conditions and under interaction with an engineered noisy environment and observed that encoding into the DFS increases the storage time by up to an order of magnitude. The encoding reversibly transfers an arbitrary qubit stored in a single ion to the DFS of two ions.

Science•Feb 9, 2001•472 citations
Any residual coupling of a quantum computer to the environment results in computational errors. Encoding quantum information in a so-called decoherence-free subspace provides means to avoid these errors. Despite tremendous progress in employing this technique to extend memory storage times by orders of magnitude, computation within such subspaces has been scarce. Here, we demonstrate the realization of a universal set of quantum gates acting on decoherence-free ion qubits. We combine these gates to realize the first controlled-NOT gate towards a decoherence-free, scalable quantum computer.
We demonstrate a decoherence-free quantum memory of one qubit. By encoding the qubit into the decoherence-free subspace (DFS) of a pair of trapped 9Be+ ions, we protect the qubit from environment-induced dephasing that limits the storage time of a qubit composed of a single ion. We measured the storage time under ambient conditions and under interaction with an engineered noisy environment and observed that encoding into the DFS increases the storage time by up to an order of magnitude. The encoding reversibly transfers an arbitrary qubit stored in a single ion to the DFS of two ions.