Enhancing entangled-state phase estimation by combining classical and quantum protocols
Heedeuk Shin, Omar S. Magaña‐Loaiza, Mehul Malik, Malcolm N. O’Sullivan, Robert W. Boyd · Optics Express · 2013
Here we describe a laboratory procedure by which we have increased the resolution of a measurement of the position of an optical component by a factor of 16. The factor of 16 arises from a four-fold quantum enhancement through the use of an N = 4 N00N state and a four-fold classical enhancement from a quadruple pass through a prism pair. The possibility of achieving supersensitivity using this method is discussed.