polar molecules
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Author(s):  
Hiroki Shioya ◽  
Naoko Inoue ◽  
Masaro Yoshida ◽  
Yoshihiro IWASA

Abstract Application of self-assembled monolayers (SAMs) is a representative method of surface modification for tuning material properties. In this study we examine the influence of the surface modification by coating the Zn-polar 0001 surface of ZnO single crystal with a SAM of triptycene-based polar molecules in our own technique and investigated temperature dependences of the sheet conductance of the surface with and without the SAM. The sheet conductance at 70 K with the SAM is increased by an order of magnitude, compared to the case without the SAM. We infer that the additional electrons are introduced at the surface by the polar triptycene molecules, whose electropositive hydroxyl groups are supposed to face toward the Zn-polar surface of ZnO. The present result implies that the molecular orientation of the triptycene SAM plays a critical role on the surface properties of oxide semiconductors.


Author(s):  
Marta Sroczyńska ◽  
Anna Dawid ◽  
Michał Tomza ◽  
Zbigniew Idziaszek ◽  
Tommaso Calarco ◽  
...  

Abstract Ultracold molecules trapped in optical tweezers show great promise for the implementation of quantum technologies and precision measurements. We study a prototypical scenario where two interacting polar molecules placed in separate traps are controlled using an external electric field. This, for instance, enables a quantum computing scheme in which the rotational structure is used to encode the qubit states. We estimate the typical operation timescales needed for state engineering to be in the range of few microseconds. We further underline the important role of the spatial structure of the two-body states, with the potential for significant gate speedup employing trap-induced resonances.


2021 ◽  
Vol 38 (12) ◽  
pp. 123201
Author(s):  
Mei Du ◽  
Dongdong Zhang ◽  
Dajun Ding

A Stark decelerator can slow down polar molecules to very low velocities. When the velocities are very low, the number of cold molecules obtained is very small. In order to obtain a higher quantity of cold molecules, inspired by the work of Reens et al. [Phys. Rev. Res. 2 (2020) 033 095], we propose an alternative method of operating a Stark decelerator. Through the trajectory simulation of OH molecules in the decelerator, we find that the number of cold molecules can be greatly increased by one order of magnitude at both low and high final velocities on a Stark decelerator consisting of around 150 electrodes. This development is due to the improved longitudinal and the transverse focusing property provided by the new switching schemes and the high-voltage configurations on the decelerator unit.


2021 ◽  
Vol 127 (16) ◽  
Author(s):  
Thomas K. Langin ◽  
Varun Jorapur ◽  
Yuqi Zhu ◽  
Qian Wang ◽  
David DeMille
Keyword(s):  

2021 ◽  
Vol 92 (10) ◽  
pp. 103202
Author(s):  
James Greenberg ◽  
O. A. Krohn ◽  
Jason A. Bossert ◽  
Yomay Shyur ◽  
David Macaluso ◽  
...  

2021 ◽  
Vol 127 (12) ◽  
Author(s):  
Sean Burchesky ◽  
Loïc Anderegg ◽  
Yicheng Bao ◽  
Scarlett S. Yu ◽  
Eunmi Chae ◽  
...  

2021 ◽  
Author(s):  
Philip D. Gregory ◽  
Jacob A. Blackmore ◽  
Sarah L. Bromley ◽  
Jeremy M. Hutson ◽  
Simon L. Cornish

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
Amit Jamadagni ◽  
Silke Ospelkaus ◽  
Luis Santos ◽  
Hendrik Weimer

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