Abstract
A novel method for controlling and manipulating quantum states of both matter and field has been developed. The approach has been applied to govern the population in rotational levels of weakly aligned molecules. This technique entails the use of an adiabatically varying electric field to interact with dipole molecules. The interaction of weakly aligned molecules with a microwave field within a high finesse cavity indicates the feasibility of achieving population inversion, rendering them well suited for maser operation even at room temperature. In addition to this, the research has shown that the absorption of molecules can be controlled too making it exceptionally well suited for gas sensing with high sensitivity and selectivity. These sensors hold promise across diverse domains, including technology, the sciences, environmental monitoring, biology, and medicine. Furthermore, the technique has the potential for employing control techniques to vacuum fields that holds promise for the generation of strongly correlated, entangled photons. This development could have far-reaching implications in quantum technology, and various applications in quantum information science and beyond.
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Parameters of some molecules are the following: CO, \({\mathcal {P}}_{{ {CO}}} = 0.122\) D, \(B_e = 1.93\) cm\(^{-1}\); and HCN, \({\mathcal {P}}_{{ {HCN}}} = 2.98\) D, \(B_v = 1.47\) cm\(^{-1}\), N\(_2\)O, \({\mathcal {P}}_{{{ {N}}_{2} { {O}}}} = 0.17\) D, \(B_e = 1.93\) cm\(^{-1}\); and NO, \({\mathcal {P}}_{{ {NO}}} = 0.16\) D, \(B_v = 1.67\) cm\(^{-1}\). NO\(_2\), \({\mathcal {P} }_{NO_2} = 0.316\) D, \(A = 8.0\) cm\(^{-1}\), \(B = 0.43\) cm\(^{-1}\), \(C = 0.41\) cm\(^{-1}\), H\(_2\)O, \({\mathcal {P} }_{H_2O} = 1.85\) D, \(B_v = 15.\) cm\(^{-1}\)
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Acknowledgements
We gratefully acknowledge the financial support of the Ministry of Education, Science and Technological Development of the Republic of Serbia (Contract No. 451-03-9/2021-14/200053), and from The Advanced Materials and Manufacturing Processes Institute at the University of North Texas Seed Research Project. Y.R. acknowledges the support from the Fulbright Scholarship, 2021–2022 to Serbia, and he is grateful to the hospitality of the Institute for Multidisciplinary Research, University of Belgrade. We cordially thank Vladimir Sautenkov, Goran Branković, and Andrey Matsko for fruitful discussions, comments and suggestions.
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Emerick, J., Roy, C., Branković, Z. et al. Quantum control of quantum systems: from room-temperature masers to generation of entanglement photons. Eur. Phys. J. Spec. Top. 232, 3359–3367 (2023). https://doi.org/10.1140/epjs/s11734-023-01009-x
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DOI: https://doi.org/10.1140/epjs/s11734-023-01009-x