Barren_plateaus_of_VQA.webp
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Summary
Description Barren plateaus of VQA.webp |
English:
For various applications such as chemistry and optimization, increasing the problem size often requires one to increase the depth L of the variational ansatz. We show that, in the presence of local noise, the gradient vanishes exponentially in L and hence exponentially in the number of qubits n when L scales linearly in n. This can be seen in the plots on the right, which show the cost function landscapes for a simple variational problem with local noise.
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Date | |
Source | https://www.nature.com/articles/s41467-021-27045-6 |
Author | Samson Wang, Enrico Fontana, M. Cerezo, Kunal Sharma, Akira Sone, Lukasz Cincio & Patrick J. Coles |
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