Quantum computation with trapped polar molecules

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  • 18 September 2001
Abstract
We propose a novel physical realization of a quantum computer. In this design, the qubits are the electric dipole moments of ultracold diatomic molecules, oriented along or against an external electric field. Individual molecules are held in a 1-D trap array, with an electric field gradient allowing spectroscopic addressing of each site. Coupling between bits is via the electric dipole-dipole interaction. We argue that by using technologies similar to those already demonstrated in a variety of experiments, this design can plausibly lead to a quantum computer with \gtrsim 10^4 qubits, which can perform \sim 10^5 CNOT gates in the \sim 5 seconds before decoherence sets in.

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