In 1977 he received his DPhil from Oxford for research on quantum gravity supervised by Dennis Sciama, Derek J. Raine and M. R.
[4] Candelas is most known for his 1985 work with Edward Witten, Andrew Strominger, and Gary Horowitz in which they introduced compactification to string theory using Calabi–Yau manifolds.
He also contributed to the understanding of the behaviour of quantum fields near boundaries, with applications to the Casimir effect and quark confinement.
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