Quantum Metrology with Two-Mode Squeezed Vacuum: Parity Detection Beats the Heisenberg Limit (2009)
Anisimov, Petr M., Raterman, Gretchen M., Chiruvelli, Aravind, Plick, William N., Huver, Sean D., Lee, Hwang, ...
We study the sensitivity and resolution of phase measurement in a Mach-Zehnder interferometer with two-mode squeezed vacuum ( photons on average). We show that super-resolution and sub-Heisenberg...
Topics in Quantum Optical Metrology (2009)
Quantum optical metrology deals with estimation of an unknown parameter by exploiting the non-classical properties of the light. The unknown parameter that we are trying to estimate is the optical...
Parity Measurements in Quantum Optical Metrology (2009)
Chiruvelli, Aravind, Lee, Hwang
We investigate the utility of parity detection to achieve Heisenberg-limited phase estimation for optical interferometry. We consider the parity detection with several input states that have been...
Canonical Phase Measurements in the Presence of Photon Loss (2008)
Chiruvelli, Aravind, Lee, Hwang
We analyze the optimal state, as given by Berry and Wiseman [Phys. Rev. Lett {\bf 85}, 5098, (2000)], under the canonical phase measurement in the presence of photon loss. The model of photon loss is...
Rapid-purification protocols for optical homodyning (2007)
Chiruvelli, Aravind, Jacobs, Kurt
We present a number of rapid-purification feedback protocols for optical homodyne detection of a single optical qubit. We derive first a protocol that speeds up the rate of increase of the average...
Mesoscopic superposition and sub-Planck-scale structure in molecular wave packets (2005)
Ghosh, Suranjana, Chiruvelli, Aravind, Banerji, J., Panigrahi, P. K.
We demonstrate the possibility of realizing sub-Planck-scale structures in the mesoscopic superposition of molecular wave packets involving vibrational levels. The time evolution of the wave packet,...