The operations of current quantum computers are still significantly affected by decoherence caused by interaction with the environment. In this work, we employ the non-perturbative hierarchical equations of motion (HEOM) method to simulate the operation of model quantum computers and reveal the effects of dissipation on the entangled quantum states and on the performance of well-known quantum algorithms. Multi-qubit entangled states in Shor’s factorizing algorithm are first generated and propagated using the HEOM. It is found that the failure of factorization is accompanied by a loss of fidelity and mutual information. An important challenge in using the HEOM to simulate quantum computers in a dissipative environment is how to efficiently treat systems with many qubits. We propose a two-dimensional tensor network scheme for this problem and demonstrate its capability by simulating a one-dimensional random circuit model with 21 qubits.
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7 February 2024
Research Article|
February 01 2024
Simulating the operation of a quantum computer in a dissipative environment
Shuocang Zhang
;
Shuocang Zhang
(Conceptualization, Data curation, Investigation, Methodology, Visualization, Writing – original draft, Writing – review & editing)
1
Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences
, Zhongguancun, Beijing 100190, China
2
University of Chinese Academy of Sciences
, Beijing 100049, China
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Yinjia Chen
;
Yinjia Chen
(Investigation, Visualization, Writing – review & editing)
1
Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences
, Zhongguancun, Beijing 100190, China
2
University of Chinese Academy of Sciences
, Beijing 100049, China
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Qiang Shi
Qiang Shi
a)
(Conceptualization, Funding acquisition, Investigation, Methodology, Project administration, Supervision, Writing – original draft, Writing – review & editing)
1
Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences
, Zhongguancun, Beijing 100190, China
2
University of Chinese Academy of Sciences
, Beijing 100049, China
a)Author to whom correspondence should be addressed: [email protected]
Search for other works by this author on:
a)Author to whom correspondence should be addressed: [email protected]
J. Chem. Phys. 160, 054101 (2024)
Article history
Received:
October 30 2023
Accepted:
January 09 2024
Citation
Shuocang Zhang, Yinjia Chen, Qiang Shi; Simulating the operation of a quantum computer in a dissipative environment. J. Chem. Phys. 7 February 2024; 160 (5): 054101. https://doi.org/10.1063/5.0185263
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