Algorithm for quantum computation of particle decays

A quantum algorithm is developed to calculate decay rates and cross sections using quantum resources that scale polynomially in the system size assuming similar scaling for state preparation and time evolution. This is done by computing finite-volume one- and two-particle Green's functions on t...

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Bibliographic Details
Published in:Physical review. D Vol. 102; no. 9; p. 1
Main Author: Ciavarella, Anthony
Format: Journal Article
Language:English
Published: College Park American Physical Society 06.11.2020
Subjects:
Algorithms
Decay rate
Green's functions
Hardware
Particle decay
Quantum computing
Scalars
Scattering cross sections
ISSN:2470-0010, 2470-0029
Online Access:Get full text
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Summary:A quantum algorithm is developed to calculate decay rates and cross sections using quantum resources that scale polynomially in the system size assuming similar scaling for state preparation and time evolution. This is done by computing finite-volume one- and two-particle Green's functions on the quantum hardware. Particle decay rates and two-particle scattering cross sections are extracted from the imaginary parts of the Green's function. A 0 + 1 dimensional implementation of this method is demonstrated on IBM's superconducting quantum hardware for the decay of a heavy scalar particle to a pair of light scalars.
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USDOE
FG02-00ER41132; SC0019478
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.102.094505