We shortly review Bell-diagonal and Werner states of two quantum bits and their characterization, and carry out a detailed experimental study of their generation on the IBM Quantum Experience. To this end we propose new circuits and tomography. One circuit involves only two quantum bits but requires adapted quantum tomography routines handling classical bits in parallel. For the first time the entire class of Bell-diagonal states is generated. A number of characteristic indicators, namely entanglement of formation, CHSH non-locality, steering and quantum discord, are evaluated over the full parameter space and compared with theory.
翻译：我们不久后将审查Bell-diagonal和Werner两个量子位的状态及其定性,并根据IBM 量子实验经验对它们的一代进行详细的实验研究。 为此,我们提议新的电路和断层摄影。 一条电路只涉及两个量子位,但需要经过调整的量子断层摄影程序,同时处理古典位子。 第一次产生了整个Bell- diagonal 状态。 一些特征指标,即编组的缠绕、CHSH非地点性、方向和量子不和性,都根据整个参数空间进行了评估,并与理论进行了比较。
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