Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

High-finesse folded cavity for quantum non-demolition measurements

Andréa D Bertoldi, Thomas Vanderbruggen, Simon Bernon, Franck Pereira dos Santos, Arnaud Landragin, Alain Aspect, Philippe Bouyer

Published Jun 10, 2009• 0 citations
OpenAlex

Related papers

Cold atoms, quantum non demolition measurements, and squeezing in a high finesse optical cavity

Andréa D Bertoldi

•Oct 13, 2009•0 citations

Towards BEC and QND measurements in a crossed high-finesse optical cavity

Thomas Vanderbruggen, Simon Bernon, Andréa D Bertoldi +4 more

•Feb 19, 2009•0 citations

Quantum correlations and non-demolition measurements using two-photon non-linearities in optical cavities

Philippe Grangier, Jean-François Roch, Serge Reynaud

Optics Communications•Aug 1, 1989•49 citations

Quantum non-demolition measurements in optics

Philippe Grangier, Juan Ariel Levenson, J.-Ph. Poizat

Nature•Dec 1, 1998•538 citations

Entanglement-Enhanced Matter-Wave Interferometry in a High-Finesse Cavity

Chengyi Luo, Graham P. Greve, Baochen Wu +1 more

We demonstrate an entanglement-enhanced matter-wave interferometer in a high-finesse cavity with 1.7 − 0.5 + 0.5 dB directly observed metrological enhancement of phase resolution. The squeezing is generated through quantum non-demolition measurement and cavity-mediated one-axis twisting dynamics.

Quantum 2.0 Conference and Exhibition•Jan 1, 2022•0 citations

Trapping and nondemolition measurement of cold atoms in a high-finesse ring cavity

Simon Bernon

This thesis investigates the generation of atomic spin-squeezed states by quantum non-demolition (QND) measurements in a high-finesse optical cavity. Cold atom interferometry has demonstrated state of the art performance for the measurement of tiny rotations, accelerations and time. The sensitivity of atom interferometers has already reached the atomic shot noise level, a limit that could be overcome by the use of non-classical atomic states. In this context, we developed a crossed high-finesse cavity resonating both at 1560 nm and 780 nm. Laser light at 1560 nm injected in the cavity generates a far off resonance optical dipole trap where Rb 87 cold atoms are loaded from a magneto-optical trap. The lifetime of the atoms in this dipole trap is limited by the residual background collisions, indicating that further evaporation process should be effective. The concepts of QND measurement are introduced and a wavefunction formalism that describes the spin-squeezing dynamics of the atomic state is discussed. This formalism is applied to practical measurement apparatus that are the Mach-Zehnder interferometer and the heterodyne detection. Experimentally, this non-destructive measurement was implemented at 780 nm in a frequency modulation scheme strongly immune to noise. The influence of this non-demolition probe on the atomic sample has been characterized in single pass and this tool has been applied to follow in real time the state of atomic interferometers. In addition to this work, a narrow linewidth Raman laser suitable for high precision spectroscopy was implemented with cold atoms as the gain medium.

•Apr 15, 2011•1 citation
This thesis investigates the generation of atomic spin-squeezed states by quantum non-demolition (QND) measurements in a high-finesse optical cavity. Cold atom interferometry has demonstrated state of the art performance for the measurement of tiny rotations, accelerations and time. The sensitivity of atom interferometers has already reached the atomic shot noise level, a limit that could be overcome by the use of non-classical atomic states. In this context, we developed a crossed high-finesse cavity resonating both at 1560 nm and 780 nm. Laser light at 1560 nm injected in the cavity generates a far off resonance optical dipole trap where Rb 87 cold atoms are loaded from a magneto-optical trap. The lifetime of the atoms in this dipole trap is limited by the residual background collisions, indicating that further evaporation process should be effective. The concepts of QND measurement are introduced and a wavefunction formalism that describes the spin-squeezing dynamics of the atomic state is discussed. This formalism is applied to practical measurement apparatus that are the Mach-Zehnder interferometer and the heterodyne detection. Experimentally, this non-destructive measurement was implemented at 780 nm in a frequency modulation scheme strongly immune to noise. The influence of this non-demolition probe on the atomic sample has been characterized in single pass and this tool has been applied to follow in real time the state of atomic interferometers. In addition to this work, a narrow linewidth Raman laser suitable for high precision spectroscopy was implemented with cold atoms as the gain medium.