Remote sensing and faithful quantum teleportation through non-localized qubits

Abstract

One of the most important applications of quantum physics is quantum teleportation, the possibility to transfer quantum states over arbitrary distances. In this paper, we address the idea of remote magnetic sensing in a teleportation scenario with topological qubits more robust against noise. We also investigate the enhancement of quantum teleportation through non-local characteristics of the topological qubits. In particular, we show that how this nonlocal property, help us to achieve near-perfect quantum teleportation even with mixed quantum states. Moreover, the important role of non-Markovianity as a resource for quantum teleportation is discussed. Considering the limitations imposed by decoherence and the subsequent mixedness of the resource state, we find that our results may solve important challenges in realizing faithful teleportation over long distances.

Estimating energy levels of a three-level atom in single and multi-parameter metrological schemes

“…Interestingly, employing quantum systems to estimate unknown parameters overcomes the precision limits that can be, in principle, achieved by applying only classical resources. This idea is at the heart of the continuously growing research area of quantum metrology aiming at reaching the ultimate fundamental bounds on estimation precision by using quantum probes [9][10][11][12][13][14][15][16][17][18][19][20][21]. This field of research has attracted a great deal of interest in the last few years, leading to notable developments both theoretically and experimentally as reported in previous review papers concerning quantum phase estimation problems [22] optical metrology [23][24][25][26][27], multiparameter estimation scenario [28][29][30][31], and metrological tasks performed by various physical systems [32][33][34].…”