Optical switch for quantum computing
Nature Communications
July 6, 2011
A simple optically controlled switch for nuclear spin-spin (inter-qubit) couplings in semiconductor-based quantum computers is described in Nature Communications this week. Such coupling is expected to have an essential role in the quantum gate operations of solid-state nuclear magnetic resonance (NMR) quantum computers in the future.
Two-quibit operation is an essential part of quantum computation, but difficult to achieve. Solid-state NMR quantum computing — one of the most advanced testbeds for quantum computation — requires a switchable inter-quibit coupling to control entanglements. Atsushi Goto and colleagues introduce optically controllable internuclear coupling in semiconductors providing a simple way of switching inter-qubit couplings in semiconductor-based quantum computers. The strength of coupling can be adjusted externally through light power, allowing easy implementation of on/off switching.
doi: 10.1038/ncomms1378
Research highlights
-
Aug 12
Materials: Storing energy in bricksNature Communications
-
Aug 11
Planetary science: Dawn’s close-up look at CeresNature Astronomy
-
Jul 30
Astrophysics: Finding the best view of the sky at nightNature
-
Jul 14
Bioengineering: Restoring damaged human lungs via cross-circulation to a pigNature Medicine
-
Jul 10
Engineering: Reducing noise transmitted through an open windowScientific Reports
-
Jul 9
Physics: The rise of the robotic researcherNature
