REDUCING RESOURCES IN QUANTUM CIRCUITS

A method (800) of minimizing a cost function of a quantum computation is provided. The method comprises receiving (802) input of an initial state (202) of a quantum problem instance comprising a Hamiltonian (204) with an associated cost function (238). The Hamiltonian is converted (804) into a numbe...

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Bibliographic Details
Main Authors Lowell, John R, Thompson, Richard Joel, Williams, Kristen Smith, Nguyen, Nam Hoang, Kagele, Marna M
Format Patent
LanguageEnglish
French
German
Published 13.09.2023
Subjects
CALCULATING
COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS
COMPUTING
COUNTING
PHYSICS
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Summary:A method (800) of minimizing a cost function of a quantum computation is provided. The method comprises receiving (802) input of an initial state (202) of a quantum problem instance comprising a Hamiltonian (204) with an associated cost function (238). The Hamiltonian is converted (804) into a number of Pauli strings (208), which are used to form (806) an operator pool (206). The Pauli strings in the operator pool are ranked (808) according to how much they lower a value of the cost function with respect to the initial state. Pauli strings are iteratively added (810) from the operator pool to a parameterized quantum circuit (224), in a manner to minimize circuit depth (234), until a variational quantum eigensolver (VQE) algorithm converges to an approximate ground state wave function generated by the parameterized quantum circuit.
Bibliography:Application Number: EP20230159587