Marletto Chiara, Vedral Vlatko, Virzì Salvatore, Avella Alessio, Piacentini Fabrizio, Gramegna Marco, Degiovanni Ivo Pietro, Genovese Marco
Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK.
Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543.
Sci Adv. 2021 Sep 17;7(38):eabe4742. doi: 10.1126/sciadv.abe4742. Epub 2021 Sep 15.
We show that, by using temporal quantum correlations as expressed by pseudo-density operators (PDOs), it is possible to recover formally the standard quantum dynamical evolution as a sequence of teleportations in time. We demonstrate that any completely positive evolution can be formally reconstructed by teleportation with different temporally correlated states. This provides a different interpretation of maximally correlated PDOs, as resources to induce quantum time evolution. Furthermore, we note that the possibility of this protocol stems from the strict formal correspondence between spatial and temporal entanglement in quantum theory. We proceed to demonstrate experimentally this correspondence, by showing a multipartite violation of generalized temporal and spatial Bell inequalities and verifying agreement with theoretical predictions to a high degree of accuracy, in high-quality photon qubits.
我们表明，通过使用由伪密度算符（PDO）表示的时间量子关联，可以在形式上将标准量子动力学演化恢复为一系列时间上的隐形传态。我们证明，任何完全正定演化都可以通过与不同时间相关态的隐形传态在形式上进行重构。这为最大相关PDO提供了一种不同的解释，即作为诱导量子时间演化的资源。此外，我们注意到该协议的可能性源于量子理论中空间和时间纠缠之间严格的形式对应。我们通过展示广义时间和空间贝尔不等式的多体违背，并在高质量光子量子比特中高度精确地验证与理论预测的一致性，来实验证明这种对应。
