Imperial College London
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Professor Myungshik Kim

Faculty of Natural Sciences, Department of Physics

Chair in Theoretical Quantum Information Sciences
 
 
 
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Contact

 

+44 (0)20 7594 7754m.kim

 
 
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Location

 

1202Electrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Kim:2016:10.1103/PhysRevLett.117.143003,
author = {Kim, MS and Wan, C and Scala, M and Morley, GW and Rahman, ATMA and Ulbricht, H and Bateman, J and Barker, PF and Bose, S},
doi = {10.1103/PhysRevLett.117.143003},
journal = {Physical Review Letters},
title = {Free nano-object Ramsey interferometry for large quantum superpositions},
url = {http://dx.doi.org/10.1103/PhysRevLett.117.143003},
volume = {117},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We propose an interferometric scheme based on an untrapped nano-object subjected to gravity.The motion of the center of mass (c.m.)  of the free object is coupled to its internal spin systemmagnetically, and a free  ight scheme is developed based on coherent spin control.  The wavepacketof the test object, under a spin-dependent force, may then be delocalized to a macroscopic scale.A  gravity  induced  dynamical  phase  (accrued  solely  on  the  spin  state,  and  measured  through  aRamsey scheme) is used to reveal the above spatially delocalised superposition of the spin-nano-object  composite  system  that  arises  during  our  scheme.   We   nd  a  remarkable  immunity  to  themotional noise in the c.m.  (initially in a thermal state with moderate cooling), and also a dynamicaldecoupling nature of the scheme itself.  Together they secure a high visibility of the resulting Ramseyfringes.  The mass independence of our scheme makes it viable for a nano-object selected from anensemble with a high mass variability.  Given these advantages, a quantum superposition with 100nm spatial separation for a massive object of 10 amu is achievable experimentally, providing a routeto test postulated modi cations of quantum theory such as continuous spontaneous localisation.
AU  - Kim,MS
AU  - Wan,C
AU  - Scala,M
AU  - Morley,GW
AU  - Rahman,ATMA
AU  - Ulbricht,H
AU  - Bateman,J
AU  - Barker,PF
AU  - Bose,S
DO  - 10.1103/PhysRevLett.117.143003
PY  - 2016///
SN  - 1079-7114
TI  - Free nano-object Ramsey interferometry for large quantum superpositions
T2  - Physical Review Letters
UR  - http://dx.doi.org/10.1103/PhysRevLett.117.143003
UR  - http://hdl.handle.net/10044/1/34521
VL  - 117
ER  -
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