Quantum Wasserstein Compilation: Unitary Compilation using the Quantum Earth Mover's Distance

• URL: http://arxiv.org/abs/2409.05849v1
• Date: Mon, 9 Sep 2024 17:46:40 GMT
• Title: Quantum Wasserstein Compilation: Unitary Compilation using the Quantum Earth Mover's Distance
• Authors: Marvin Richter, Abhishek Y. Dubey, Axel Plinge, Christopher Mutschler, Daniel D. Scherer, Michael J. Hartmann,
• Abstract summary: We present a quantum Wasserstein compilation (QWC) cost function based on the quantum Wasserstein distance of order 1. An estimation method based on measurements of local Pauli-observable is utilized in a generative adversarial network to learn a given quantum circuit.
• Score: 2.502222151305252
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Despite advances in the development of quantum computers, the practical application of quantum algorithms remains outside the current range of so-called noisy intermediate-scale quantum devices. Now and beyond, quantum circuit compilation (QCC) is a crucial component of any quantum algorithm execution. Besides translating a circuit into hardware-specific gates, it can optimize circuit depth and adapt to noise. Variational quantum circuit compilation (VQCC) optimizes the parameters of an ansatz according to the goal of reproducing a given unitary transformation. In this work, we present a VQCC-objective function called the quantum Wasserstein compilation (QWC) cost function based on the quantum Wasserstein distance of order 1. We show that the QWC cost function is upper bound by the average infidelity of two circuits. An estimation method based on measurements of local Pauli-observable is utilized in a generative adversarial network to learn a given quantum circuit. We demonstrate the efficacy of the QWC cost function by compiling a single-layer hardware efficient ansatz (HEA) as both the target and the ansatz and comparing other cost functions such as the Loschmidt echo test (LET) and the Hilbert-Schmidt test (HST). Finally, our experiments demonstrate that QWC as a cost function can mitigate the barren plateaus for the particular problem we consider.

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