# Atom Interferometry

The Experts below are selected from a list of 2553 Experts worldwide ranked by ideXlab platform

### Richard E Stoner – 1st expert on this subject based on the ideXlab platform

• ##### large area AtomInterferometry with frequency swept raman adiabatic passage
Physical Review Letters, 2015
Co-Authors: Krish Kotru, David L Butts, Joseph M Kinast, Richard E Stoner

Abstract:

A system and method for inertial sensing using large momentum transfer Atom Interferometry. Certain examples include applying a π/2-π-π/2 sequence to a cloud of Atoms that produces 2k momentum splitting, and applying at least one augmentation pulse to the cloud of Atoms to increase the momentum splitting. For instance, examples include Atom optics that are based on stimulated Raman transitions and adiabatic rapid passage that produce momentum splittings of at least 30 photon recoil momenta in a Mach-Zhender interferometer. In some examples, substantial recapture of the Atoms allows for higher data rates.

• ##### Large-Area AtomInterferometry with Frequency-Swept Raman Adiabatic Passage.
Physical review letters, 2015
Co-Authors: Krish Kotru, David L Butts, Joseph M Kinast, Richard E Stoner

Abstract:

We demonstrate light-pulse Atom Interferometry with large-momentum-transfer Atom optics based on stimulated Raman transitions and frequency-swept adiabatic rapid passage. Our Atom optics have produced momentum splittings of up to 30 photon recoil momenta in an acceleration-sensitive interferometer for laser cooled Atoms. We experimentally verify the enhancement of phase shift per unit acceleration and characterize interferometer contrast loss. By forgoing evaporative cooling and velocity selection, this method lowers the Atom shot-noise-limited measurement uncertainty and enables large-area Atom Interferometry at higher data rates.

• ##### efficient broadband raman pulses for large area AtomInterferometry
Journal of The Optical Society of America B-optical Physics, 2013
Co-Authors: David L Butts, Joseph M Kinast, Brian P Timmons, Krish Kotru, Antonije M Radojevic, Richard E Stoner

Abstract:

We report a demonstration of composite Raman pulses that achieve broadband population inversion and are used to increase the momentum splitting of an Atom interferometer up to 18ℏk (corresponding to an increase in the inertial signal by a factor of nine). Composite Raman pulses suppress the effects of pulse length and detuning errors, providing higher transfer efficiency and velocity acceptance than single square pulses. We implement two composite pulse sequences, π/20°−π90°−π/20° and π/20°−π180°−3π/20°, and use the latter composite pulse to demonstrate large-area Atom Interferometry with stimulated Raman transitions. In addition to enabling larger momentum transfer and higher sensitivity, we argue that composite pulses can improve the robustness of Atom interferometers operating in dynamic environments.

### Jason M. Hogan – 2nd expert on this subject based on the ideXlab platform

• ##### large momentum transfer clock AtomInterferometry on the 689 nm intercombination line of strontium
Physical Review Letters, 2020
Co-Authors: Jan Rudolph, Thomas Wilkason, Megan Nantel, Hunter Swan, Connor M Holland, Yijun Jiang, Benjamin E Garber, Samuel P Carman, Jason M. Hogan

Abstract:

We report the first realization of large momentum transfer (LMT) clock Atom Interferometry. Using single-photon interactions on the strontium ^{1}S_{0}-^{3}P_{1} transition, we demonstrate Mach-Zehnder interferometers with state-of-the-art momentum separation of up to 141 variant Planck’s over 2pik and gradiometers of up to 81 variant Planck’s over 2pik. Moreover, we circumvent excited state decay limitations and extend the gradiometer duration to 50 times the excited state lifetime. Because of the broad velocity acceptance of the Interferometry pulses, all experiments are performed with laser-cooled Atoms at a temperature of 3 muK. This work has applications in high-precision inertial sensing and paves the way for LMT-enhanced clock Atom Interferometry on even narrower transitions, a key ingredient in proposals for gravitational wave detection and dark matter searches.

• ##### large momentum transfer clock AtomInterferometry on the 689 nm intercombination line of strontium
arXiv: Atomic Physics, 2019
Co-Authors: Jan Rudolph, Thomas Wilkason, Megan Nantel, Hunter Swan, Connor M Holland, Yijun Jiang, Benjamin E Garber, Samuel P Carman, Jason M. Hogan

Abstract:

We report the first realization of large momentum transfer (LMT) clock Atom Interferometry. Using single-photon interactions on the strontium ${}^1S_0 – {}^3P_1$ transition, we demonstrate Mach-Zehnder interferometers with state-of-the-art momentum separation of up to $141\,\hbar k$ and gradiometers of up to $81\,\hbar k$. Moreover, we circumvent excited state decay limitations and extend the gradiometer duration to 50 times the excited state lifetime. Due to the broad velocity acceptance of the Interferometry pulses, all experiments are performed with laser-cooled Atoms at a temperature of $3\,\mu \text{K}$. This work has applications in high-precision inertial sensing and paves the way for LMT-enhanced clock Atom Interferometry in gravitational wave detection and dark matter search proposals.

• ##### multiaxis inertial sensing with long time point source AtomInterferometry
Physical Review Letters, 2013
Co-Authors: Susannah Dickerson, Jason M. Hogan, David Scott Johnson, Alex Sugarbaker, Mark A. Kasevich

Abstract:

We show that light-pulse Atom Interferometry with Atomic point sources and spatially resolved detection enables multi-axis (two rotation, one acceleration) precision inertial sensing at long interrogation times. Using this method, we demonstrate a light-pulse Atom interferometer for Rb-87 with 1.4 cm peak wavepacket separation and a duration of 2T = 2.3 seconds. The inferred acceleration sensitivity of each shot is 6.7 * 10^(-12) g, which improves on previous limits by more than two orders of magnitude. We also measure the Earth’s rotation rate with a precision of 200 nrad/s.

### Alexandre Bresson – 3rd expert on this subject based on the ideXlab platform

• ##### Zero-velocity AtomInterferometry using a retroreflected frequency chirped laser
arXiv: Atomic Physics, 2019
Co-Authors: Isadora Perrin, N. Zahzam, Alexandre Bresson, Yannick Bidel, Jeanne Bernard, Cédric Blanchard, M. Cadoret

Abstract:

Atom Interferometry using stimulated Raman transitions in a retroreflected configuration is the first choice in high precision measurements because it provides low phase noise, high quality Raman wavefront and simple experimental setup. However, it cannot be used for Atoms at zero velocity because two pairs of Raman lasers are simultaneously resonant. Here we report a method which allows to lift this degeneracy by using a frequency chirp on the Raman lasers. Using this technique, we realize a Mach-Zehnder Atom interferometer hybridized with a force balanced accelerometer which provides horizontal acceleration measurements with a short-term sensitivity of $3.2\times 10^{-5}$ m.s$^{-2}$/$\sqrt{Hz}$. We check at the level of precision of our experiment the absence of bias induced by this method. This technique could be used for multiaxis inertial sensors, tiltmeters or Atom Interferometry in a microgravity environment.

• ##### New concepts of inertial measurements with multi-species AtomInterferometry
Applied Physics B, 2018
Co-Authors: Alexis Bonnin, N. Zahzam, Yannick Bidel, M. Cadoret, Clément Diboune, Alexandre Bresson

Abstract:

In the field of cold Atom inertial sensors, we present and analyze innovative configurations for improving their measurement range and sensitivity, especially attracting for onboard applications. These configurations rely on multi-species Atom Interferometry, involving the simultaneous manipulation of different Atomic species in a unique instrument to deduce inertial measurements. Using a dual-species Atom accelerometer manipulating simultaneously both isotopes of rubidium, we report a preliminary experimental realization of original concepts involving the implementation of two Atom interferometers, first, with different interrogation times and, second, in phase quadrature.

• ##### Compact and robust laser system for precision AtomInterferometry based on a frequency doubled telecom fiber bench
CLEO: 2015, 2015
Co-Authors: Felicie Théron, N. Zahzam, Yannick Bidel, M. Cadoret, Alexandre Bresson

Abstract:

We present a compact and robust narrow linewidth laser system for onboard Rubidium Atom Interferometry using only one laser source based on a frequency doubled telecom fiber bench.