Figure 2 (IMAGE) Science China Press Caption Relationship between of the complexity class of estimating boson amplitude, and classical and quantum computation. Our result establishes that calculating the boson amplitude, with a polynomial additive error, is a problem inside BPP. Credit ©Science China Press Usage Restrictions Use with credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.