Computation of Molecular Spectra on a Quantum Processor with an Error-Resilient Algorithm

التفاصيل البيبلوغرافية
العنوان:	Computation of Molecular Spectra on a Quantum Processor with an Error-Resilient Algorithm
المؤلفون:	J. I. Colless, V. V. Ramasesh, D. Dahlen, M. S. Blok, M. E. Kimchi-Schwartz, J. R. McClean, J. Carter, W. A. de Jong, I. Siddiqi
المصدر:	Physical Review X, Vol 8, Iss 1, p 011021 (2018)
بيانات النشر:	American Physical Society
سنة النشر:	2018
المجموعة:	Directory of Open Access Journals: DOAJ Articles
مصطلحات موضوعية:	Physics, QC1-999
الوصف:	Harnessing the full power of nascent quantum processors requires the efficient management of a limited number of quantum bits with finite coherent lifetimes. Hybrid algorithms, such as the variational quantum eigensolver (VQE), leverage classical resources to reduce the required number of quantum gates. Experimental demonstrations of VQE have resulted in calculation of Hamiltonian ground states, and a new theoretical approach based on a quantum subspace expansion (QSE) has outlined a procedure for determining excited states that are central to dynamical processes. We use a superconducting-qubit-based processor to apply the QSE approach to the H_{2} molecule, extracting both ground and excited states without the need for auxiliary qubits or additional minimization. Further, we show that this extended protocol can mitigate the effects of incoherent errors, potentially enabling larger-scale quantum simulations without the need for complex error-correction techniques.
نوع الوثيقة:	article in journal/newspaper
اللغة:	English
تدمد:	2160-3308
Relation:	http://doi.org/10.1103/PhysRevX.8.011021; https://doaj.org/toc/2160-3308; https://doaj.org/article/00cc79b93bc34ef4b26f4119c913b5e6
DOI:	10.1103/PhysRevX.8.011021
الاتاحة:	https://doi.org/10.1103/PhysRevX.8.011021 https://doaj.org/article/00cc79b93bc34ef4b26f4119c913b5e6
رقم الانضمام:	edsbas.EE87BDDE
قاعدة البيانات:	BASE

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الوصف
تدمد:	21603308
DOI:	10.1103/PhysRevX.8.011021