A controlled ac Stark echo for quantum memories

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/473537.do
DOI
10.1038/s41598-017-08051-5
Title
A controlled ac Stark echo for quantum memories
Description
This work was supported by the ICT R&D program of MSIT/IITP (1711042435:Reliable crypto-system standards and core technology development forsecure quantum key distribution network) and the GIST-Caltech Program in2016. BSH also acknowledges discussions with R. W. Boyd of University ofRochester (USA) and M. S. Shahriar of Northwestern University (USA) forthe ac Stark shift.
abstract
A quantum memory protocol of controlled ac Stark echoes (CASE) based on a double rephasing photon echo scheme via controlled Rabi flopping is proposed. The double rephasing scheme of photon echoes inherently satisfies the no-population inversion requirement for quantum memories, but the resultant absorptive echo remains a fundamental problem. Herein, it is reported that the first echo in the double rephasing scheme can be dynamically controlled so that it does not affect the second echo, which is accomplished by using unbalanced ac Stark shifts. Then, the second echo is coherently controlled to be emissive via controlled coherence conversion. Finally a near perfect ultralong CASE is presented using a backward echo scheme. Compared with other methods such as dc Stark echoes, the present protocol is all-optical with advantages of wavelength-selective dynamic control of quantum processing for erasing, buffering, and channel multiplexing.
provenance
Made available in Cube on 2018-09-28T10:22:18Z (GMT). No. of bitstreams: 0
language
English
author
Ham, Byoung S.
accessioned
2018-09-28T10:22:18Z
available
2018-09-28T10:22:18Z
issued
2017
citation
SCIENTIFIC REPORTS(7)
issn
2045-2322
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/473537.do
Funder
과학기술정보통신부
Funding Program
ICT융합산업원천기술개발사업
Project ID
1711057505
Jurisdiction
Rep.of Korea
Project Name
Reliable crypto-system standards and core technology development for secure quantum key distribution network
rights
openAccess
type
article


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