Quantum gate arrays can be programmed to evaluate the expectation value of any operator

A programmable gate array is a circuit whose action is controlled by input data. In this paper we describe a special-purpose quantum circuit that can be programmed to evaluate the expectation value of any operator O acting on a space of states of N dimensions. The circuit has a program register whos...

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Publicado: 2003
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v68_n5_p5_Paz
http://hdl.handle.net/20.500.12110/paper_10502947_v68_n5_p5_Paz
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_10502947_v68_n5_p5_Paz
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spelling paper:paper_10502947_v68_n5_p5_Paz2023-06-08T16:02:10Z Quantum gate arrays can be programmed to evaluate the expectation value of any operator A programmable gate array is a circuit whose action is controlled by input data. In this paper we describe a special-purpose quantum circuit that can be programmed to evaluate the expectation value of any operator O acting on a space of states of N dimensions. The circuit has a program register whose state [Formula Presented] encodes the operator O whose expectation value is to be evaluated. The method requires knowledge of the expansion of O in a basis of the space of operators. We discuss some applications of this circuit and its relation to known instances of quantum state tomography. © 2003 The American Physical Society. 2003 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v68_n5_p5_Paz http://hdl.handle.net/20.500.12110/paper_10502947_v68_n5_p5_Paz
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description A programmable gate array is a circuit whose action is controlled by input data. In this paper we describe a special-purpose quantum circuit that can be programmed to evaluate the expectation value of any operator O acting on a space of states of N dimensions. The circuit has a program register whose state [Formula Presented] encodes the operator O whose expectation value is to be evaluated. The method requires knowledge of the expansion of O in a basis of the space of operators. We discuss some applications of this circuit and its relation to known instances of quantum state tomography. © 2003 The American Physical Society.
title Quantum gate arrays can be programmed to evaluate the expectation value of any operator
spellingShingle Quantum gate arrays can be programmed to evaluate the expectation value of any operator
title_short Quantum gate arrays can be programmed to evaluate the expectation value of any operator
title_full Quantum gate arrays can be programmed to evaluate the expectation value of any operator
title_fullStr Quantum gate arrays can be programmed to evaluate the expectation value of any operator
title_full_unstemmed Quantum gate arrays can be programmed to evaluate the expectation value of any operator
title_sort quantum gate arrays can be programmed to evaluate the expectation value of any operator
publishDate 2003
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v68_n5_p5_Paz
http://hdl.handle.net/20.500.12110/paper_10502947_v68_n5_p5_Paz
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