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DOE OSTI · 1606225

Quantum Simulation of Field Theories Without State Preparation

Harmalkar, Siddhartha·Lamm, Henry·Lawrence, Scott
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Abstract

We propose an algorithm for computing real-time observables using a quantum processor while avoiding the need to prepare the full quantum state. This reduction in quantum resources is achieved by classically sampling configurations in imaginary-time using standard lattice field theory. These configurations can then be passed to quantum processor for time-evolution. This method encounters a signal-to-noise problem which we characterize, and we demonstrate the application of standard lattice QCD methods to mitigate it.

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Harmalkar, Siddhartha, Lamm, Henry, Lawrence, Scott. 2020-01-30. Quantum Simulation of Field Theories Without State Preparation. https://www.osti.gov/biblio/1606225

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