Robust Self Testing of the Singlet

Details Robust Self Testing of the Singlet Robust Self Testing of the Singlet

2012-03-13

arxiv.org/abs/1203.2976v1

Physics

Quantum Physics

7 pages, 1 figure

Scientific paper

In this paper, we introduce a general framework to study the concept of robust self testing which can be used to self test EPR pairs and local measurement operators. The result is based only on probabilities obtained from experiment, with tolerance to experimental errors. In particular, we show that if results of experiment come approach the Cirel'son bound, or approximates the Mayers-Yao type correlation, then the experiment must contain an approximate EPR pair. More specifically, there exist local bases in which the physical state is close to an EPR pair, possibly all encoded in a larger environment or ancilla. Moreover, in theses bases the measurements are close to the qubit operators used to achieve the Cirel'son bound or the Mayers-Yao results.

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