Seminar
Lattice of ion traps for quantum technology and thermal Rydberg quantum optics
Speaker: Arup Bhowmick (Raman Research Institute)
Scalable ion trap architecture has been one of the key challenges in the quest for quantum technologies with trapped ions. This is because scalability would serve to increase the number of trapped ions, which can be manipulated for precision experiments. The precision experiments such as optical clock using neutral atoms trapped in optical lattice have evolved dramatically in the recent years to be a highly stable clock [1, 2], but it has a limitation in its short trap lifetime. On the other hand, the lifetime of the trapped ion is virtually infinite and hence allows the building of robust optical clocks [3, 4]. Here, I will discuss a number-scalable 3D [4], and 1D lattice of ion traps architecture where single ions trapped in the individual sub-traps is an efficient system to build ion clocks and a chain of ions trapped in the individual sub-traps is an efficient system for quantum computation.
In the second part of the presentation, I will discuss my past research works regarding Rydberg interaction in thermal atomic vapor. The observation of the Rydberg interaction-induced non-linearity in an electromagnetically induced medium [5] will be explained. A state-dependent interaction due to the Rydberg blockade [6] and Rydberg anti-blockade [7] will be presented. The multi-atom coherence generated by the Rydberg interaction can be used to make a CNOT gate and hence the Rydberg quantum optics can allow us to perform cutting-edge quantum engineering to build the quantum computer.
References:
[1] H. Katori, Nature Photonics 5, 203 (2011).
[2] B. J. Bloom, T. L. Nicholson, J. R. Williams, S. L. Campbell, M. Bishof, X. Zhang,W. Zhang, S. L. Bromley, and J. Ye, Nature, 506, 71 (2014).
[3] A. D. Ludlow, M. M. Boyd, and J. Ye, Rev. of Mod. Phys. 87, 637 (2015).
[4] K. Ravi, S. Lee, A. Sharma, T. Ray, G. Werth, and S. A. Rangwala, Phys. Rev. A 81, 031401 (R) (2010).
[5] A. Bhowmick, S. S. Sahoo, and A. K. Mohapatra, Phys. Rev. A 94, 023839 (2016).
[6] A. Bhowmick, D. Kara, and A. K. Mohapatra, arXiv: 1802.06599v1 (2018).
[7] D. Kara, A. Bhowmick, and A. K. Mohapatra, Scientific Reports 8, 5256 (2018).