Violation of no-signaling on a public quantum computer

Tomasz Rybotycki, Tomasz Białecki, Josep Batle, Adam Bednorz
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Abstract

No-signaling is a consequence of the no-communication theorem that states that bipartite systems cannot transfer information unless a communication channel exists. It is also a by-product of the assumptions of Bell theorem about quantum nonlocality. We have tested no-signaling in bipartite systems of qubits from IBM Quantum devices in extremely large statistics, resulting in significant violations. Although the time and space scales of IBM Quantum cannot in principle rule out subluminal communications, there is no obvious physical mechanism leading to signaling. The violation is also at similar level as observed in Bell tests. It is therefore mandatory to check possible technical imperfections that may cause the violation and to repeat the loophole-free Bell test at much larger statistics, in order to be ruled out definitively at strict spacelike conditions.
违反公共量子计算机的无信号规定
无信号是无通信定理的结果,该定理指出,除非存在通信通道,否则双系统无法传递信息。它也是贝尔定理关于量子非局域性假设的副产品。我们测试了来自 IBM 量子设备的量子比特双机系统在超大统计量情况下的无信号传输,结果发现严重违反了这一假设。虽然 IBM 量子的时间和空间尺度原则上不能排除亚光速通信,但没有明显的物理机制导致信号传递。因此,必须检查可能导致违规的技术缺陷,并在更大的统计量下重复无漏洞贝尔测试,以便在严格的类空间条件下明确排除违规。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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