Abstract
We propose a ground-state approach to realizing quantum computers. This scheme is time-independent and inherently defends against decoherence by possessing an energy barrier to excitation. We prove that our time-independent qubits can perform the same algorithms as their time-dependent counterparts. Advantages and disadvantages of the time-independent approach are described. A model involving quantum dots is provided for illustration.
- Received 2 July 2000
DOI:https://doi.org/10.1103/PhysRevA.63.040302
©2001 American Physical Society
