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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Thermodynamic analysis of quantum error-correcting engines

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Autor(es):
Landi, Gabriel T. [1] ; Fonseca de Oliveira, Andre L. [2] ; Buksman, Efrain [2]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Inst Fis, BR-05314970 Sao Paulo - Brazil
[2] Univ ORT Uruguay, Fac Ingn, Montevideo 11100 - Uruguay
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Physical Review A; v. 101, n. 4 APR 9 2020.
Citações Web of Science: 0
Resumo

Quantum error-correcting codes can be cast in a way which is strikingly similar to a quantum heat engine undergoing an Otto cycle. In this paper, we strengthen this connection further by carrying out a complete assessment of the thermodynamic properties of four-stroke operator-based error-correcting codes. This includes an expression for the entropy production in the cycle which, as we show, contains clear contributions stemming from the different sources of irreversibility. To illustrate our results, we study a classical three-qubit error-correcting code, well suited for incoherent states, and the nine-qubit Shor code capable of handling fully quantum states. We show that the work cost associated with the correction gate is directly associated with the heat introduced by the error. Moreover, the work cost associated with encoding and decoding quantum information is always positive, a fact which is related to the intrinsic irreversibility introduced by the noise. Finally, we find that correcting the coherent (and thus genuinely quantum) part of a quantum state introduces substantial modifications related to the Hadamard gates required to encode and decode coherences. (AU)

Processo FAPESP: 18/12813-0 - Termodinâmica quântica de sistemas bosônicos
Beneficiário:Gabriel Teixeira Landi
Linha de fomento: Auxílio à Pesquisa - Regular