%0 Journal Article %1 Anetsberger2010Measuring %A Anetsberger, G. %A Gavartin, E. %A Arcizet, O. %A Unterreithmeier, Q. P. %A Weig, E. M. %A Gorodetsky, M. L. %A Kotthaus, J. P. %A Kippenberg, T. J. %D 2010 %I American Physical Society %J Physical Review A %K sql toroids optomechanics %N 6 %P 061804+ %R 10.1103/physreva.82.061804 %T Measuring nanomechanical motion with an imprecision below the standard quantum limit %U http://dx.doi.org/10.1103/physreva.82.061804 %V 82 %X We report a room-temperature measurement of nanomechanical motion with an imprecision below the standard quantum limit (SQL), using cavity-enhanced optical near fields. Fundamental thermodynamical cavity frequency fluctuation limits the total imprecision to 3 dB below the SQL at room temperature corresponding to (530 am/√Hz)2 in absolute units and is expected to reduce to negligible values at moderate cryogenic temperatures. Coupling strengths exceeding those required to reach the SQL by more than two orders of magnitude are achieved, allowing a shot-noise limited imprecision more than 10 dB below the SQL. The transducer, thus, in principle, allows access to the quantum backaction dominated regime, a prerequisite for exploring quantum backaction, measurement-induced squeezing, and obtaining sub-SQL sensitivity using backaction evading techniques.

@article{Anetsberger2010Measuring, abstract = {{We report a room-temperature measurement of nanomechanical motion with an imprecision below the standard quantum limit (SQL), using cavity-enhanced optical near fields. Fundamental thermodynamical cavity frequency fluctuation limits the total imprecision to 3 dB below the SQL at room temperature [corresponding to (530 am/√Hz)2 in absolute units] and is expected to reduce to negligible values at moderate cryogenic temperatures. Coupling strengths exceeding those required to reach the SQL by more than two orders of magnitude are achieved, allowing a shot-noise limited imprecision more than 10 dB below the SQL. The transducer, thus, in principle, allows access to the quantum backaction dominated regime, a prerequisite for exploring quantum backaction, measurement-induced squeezing, and obtaining sub-SQL sensitivity using backaction evading techniques.}}, added-at = {2013-09-09T23:59:35.000+0200}, author = {Anetsberger, G. and Gavartin, E. and Arcizet, O. and Unterreithmeier, Q. P. and Weig, E. M. and Gorodetsky, M. L. and Kotthaus, J. P. and Kippenberg, T. J.}, biburl = {https://www.bibsonomy.org/bibtex/2e2d03c2a3c46588320c800c189b7b46b/jacksankey}, citeulike-article-id = {9072455}, citeulike-linkout-0 = {http://dx.doi.org/10.1103/physreva.82.061804}, doi = {10.1103/physreva.82.061804}, interhash = {43fa98dc648df9085ce4a231bb5025a1}, intrahash = {e2d03c2a3c46588320c800c189b7b46b}, journal = {Physical Review A}, keywords = {sql toroids optomechanics}, month = dec, number = 6, pages = {061804+}, posted-at = {2011-03-28 18:03:11}, priority = {2}, publisher = {American Physical Society}, timestamp = {2013-09-10T00:17:08.000+0200}, title = {{Measuring nanomechanical motion with an imprecision below the standard quantum limit}}, url = {http://dx.doi.org/10.1103/physreva.82.061804}, volume = 82, year = 2010 }