Variational quantum simulation of many-body dissipative dynamics on a superconducting quantum processor

• URL: http://arxiv.org/abs/2510.20118v1
• Date: Thu, 23 Oct 2025 01:43:53 GMT
• Title: Variational quantum simulation of many-body dissipative dynamics on a superconducting quantum processor
• Authors: Huan-Yu Liu, Tai-Ping Sun, Zhao-Yun Chen, Cheng Xue, Chao Wang, Xi-Ning Zhuang, Jin-Peng Liu, Wei Yi, Yu-Chun Wu, Guo-Ping Guo,
• Abstract summary: We show a variational quantum algorithm capable of scalable simulation of non-unitary many-body dissipative dynamics.<n>Our work underlines the capability of noisy intermediate-scale quantum devices in simulating dissipative many-body dynamics.
• Score: 10.739803066812476
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Open quantum systems host a wide range of intriguing phenomena, yet their simulation on well-controlled quantum devices is challenging, owing to the exponential growth of the Hilbert space and the inherently non-unitary nature of the dynamics. Here we propose and experimentally demonstrate a variational quantum algorithm capable of scalable simulation of non-unitary many-body dissipative dynamics. The algorithm builds on the framework of linear combination of Hamiltonian simulation, which converts non-unitary dynamics into a weighted sum of unitary evolutions. With the further introduction of a simplified quantum circuit for loss-function evaluation, our scheme is suitable for near-term quantum hardware, with the circuit depth independent of the simulation time. We illustrate our scheme by simulating the collective dynamics of a dissipative transverse Ising model, as well as an interacting Hatano-Nelson model, on the superconducting quantum processor Wukong. Our work underlines the capability of noisy intermediate-scale quantum devices in simulating dissipative many-body dynamics and represents a step forward in exploiting their potential for solving outstanding physical problems.

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