Measurement-based quantum computing, where computation occurs through measurements on entangled states, offers an alternative paradigm to gate-based quantum computing. This approach has unique advantages and challenges.
In measurement-based computing, a highly entangled resource state is prepared first. Computation then proceeds through sequential measurements with outcomes guiding subsequent measurements.
This paradigm may be easier to implement in some quantum hardware platforms. Photonic quantum computing particularly suits measurement-based approaches.
The resource states required for measurement-based computing are complex to prepare. Creating and verifying these states presents significant challenges.
Measurement-based and gate-based quantum computing are fundamentally equivalent in computational power. However, practical implementations may favor one approach over the other depending on hardware.
Research into measurement-based quantum computing continues alongside gate-based approaches. Having multiple pathways toward quantum computing increases the likelihood of success.