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arXiv 2410.02412quant-phgr-qc
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利用IBM量子计算机对宇宙学粒子产生进行数字量子模拟

Digital quantum simulation of cosmological particle creation with IBM quantum computers

Marco Díaz Maceda, Carlos Sabín

AI总结:

该研究利用数字量子计算模拟动态时空中的粒子产生,设计量子电路实现时间演化并在IBM量子计算机上实验,结合误差缓解技术改进粒子数量估计和状态保真度。

摘要:

我们利用数字量子计算模拟动态时空中的粒子产生。考虑一个由最小耦合的有质量量子标量场组成的系统,该场处于经历均匀各向同性膨胀的时空,通过短暂的暴胀期从一个稳态过渡到另一个稳态。我们通过设计实现时间演化的量子电路,模拟给定场动量下的正负两种振动模式。使用该电路,我们通过模拟电路和在包含数百个量子门的IBM量子计算机上进行实际实验实现,研究宇宙以给定速率膨胀后产生的粒子数量。我们发现最先进的误差缓解技术有助于改进粒子数量估计和状态保真度。

英文摘要:

We use digital quantum computing to simulate the creation of particles in a dynamic spacetime. We consider a system consisting of a minimally coupled massive quantum scalar field in a spacetime undergoing homogeneous and isotropic expansion, transitioning from one stationary state to another through a brief inflationary period. We simulate two vibration modes, positive and negative for a given field momentum, by devising a quantum circuit that implements the time evolution. With this circuit, we study the number of particles created after the universe expands at a given rate, both by simulating the circuit and by actual experimental implementation on IBM quantum computers, consisting of hundreds of quantum gates. We find that state-of-the-art error mitigation techniques are useful to improve the estimation of the number of particles and the fidelity of the state.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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