Null dimension witness based on single measurements

Abstract

We present a null witness of the dimension of a quantum system, discriminating real, complex and classical spaces, based on equality due to linear independence. The witness involves only a single measurement with sufficiently many outcomes and prepared input states. In addition, for intermediate dimensions, the witness bounds saturate for a family of equiangular tight frames including symmetric informationally complete positive operator valued measures. Such a witness requires a minimum of resources, being robust against many practical imperfections. We also discuss errors due to finite statistics.

6 pages, 1 figure, 1 table

References in corpus (3)

• Device-independent tests of classical and quantum dimensions
• Dimension witnesses and quantum state discrimination
• Optimal classical and quantum real and complex dimension witness

Cited by in corpus (1)

• Quantum null-hypothesis device-independent Schmidt rank witness