The Experts below are selected from a list of 2553 Experts worldwide ranked by ideXlab platform
Richard E Stoner - One of the best experts on this subject based on the ideXlab platform.
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large area Atom Interferometry with frequency swept raman adiabatic passage
Physical Review Letters, 2015Co-Authors: Krish Kotru, David L Butts, Joseph M Kinast, Richard E StonerAbstract: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 2k 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.
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Large-Area Atom Interferometry with Frequency-Swept Raman Adiabatic Passage.
Physical review letters, 2015Co-Authors: Krish Kotru, David L Butts, Joseph M Kinast, Richard E StonerAbstract: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.
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efficient broadband raman pulses for large area Atom Interferometry
Journal of The Optical Society of America B-optical Physics, 2013Co-Authors: David L Butts, Joseph M Kinast, Brian P Timmons, Krish Kotru, Antonije M Radojevic, Richard E StonerAbstract: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.
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coherent population trapping in raman pulse Atom Interferometry
Physical Review A, 2011Co-Authors: David L Butts, Joseph M Kinast, Brian P Timmons, Antonije M Radojevic, Richard E StonerAbstract:Raman pulse Atom Interferometry is an important modality for precision measurements of inertial forces and tests of fundamental physics. Typical Raman Atom optics use two coherent laser fields applied at gigahertz-scale detunings from optical resonance, so that spontaneous emission produces a minor or negligible source of decoherence. An additional consequence of spontaneous emission is coherent population trapping (CPT). We show that CPT produces coherences and population differences which induce systematic effects in Raman pulse Atom interferometers. We do not believe that CPT has been previously identified as an error mechanism in Raman pulse Atom Interferometry. We present an experimental characterization of CPT coherences and population differences induced in laser-cooled cesium Atoms by application of Raman pulses at detunings near 1 GHz, commensurate with detunings used in several precision measurement experiments. We are not aware of previous demonstrations of CPT-induced population difference. We argue that CPT effects could induce phase shifts of several milliradians in magnitude for typical experimental parameters and stipulate that these errors can be suppressed by propagation direction reversal in Raman interferometer-based precision measurements.
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light pulse Atom Interferometry at short interrogation times
Journal of The Optical Society of America B-optical Physics, 2011Co-Authors: David L Butts, Joseph M Kinast, Brian P Timmons, Richard E StonerAbstract:The use of cold Atoms in any sensor operating in a dynamic environment requires that the measurement cycle be conducted before the Atom cloud escapes the interaction region. Under multiple-g accelerations it is desirable to complete measurements in millisecond time scales, particularly when laser beams are used to interrogate the Atoms. In this paper, we demonstrate high-contrast Atom Interferometry in a vapor cell using stimulated Raman transitions at millisecond interrogation times. Laser-cooled cesium Atoms are interrogated with a sequence of three Raman pulses and the interferometer phase is read out in the same region in which the Atoms are trapped. Our system achieved over 70% contrast with a Doppler insensitive interferometer and over 30% contrast with a Doppler sensitive interferometer, in an environment normally considered adverse to high-contrast Atom Interferometry (e.g., no retroreflector stabilization and no magnetic shielding). Demonstration of an inertially sensitive Atom interferometer in this environment supports the feasibility of a high-bandwidth inertial sensor using light pulse Atom Interferometry. Finally, we show that Raman pulse population transfer efficiency in our system is primarily limited by nonuniformity of the Raman laser intensity across the Atom cloud.
Jason M. Hogan - One of the best experts on this subject based on the ideXlab platform.
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large momentum transfer clock Atom Interferometry on the 689 nm intercombination line of strontium
Physical Review Letters, 2020Co-Authors: Jan Rudolph, Thomas Wilkason, Megan Nantel, Hunter Swan, Connor M Holland, Yijun Jiang, Benjamin E Garber, Samuel P Carman, Jason M. HoganAbstract: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.
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large momentum transfer clock Atom Interferometry on the 689 nm intercombination line of strontium
arXiv: Atomic Physics, 2019Co-Authors: Jan Rudolph, Thomas Wilkason, Megan Nantel, Hunter Swan, Connor M Holland, Yijun Jiang, Benjamin E Garber, Samuel P Carman, Jason M. HoganAbstract: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.
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multiaxis inertial sensing with long time point source Atom Interferometry
Physical Review Letters, 2013Co-Authors: Susannah Dickerson, Jason M. Hogan, David Scott Johnson, Alex Sugarbaker, Mark A. KasevichAbstract: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.
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Light-pulse Atom Interferometry
arXiv: Atomic Physics, 2008Co-Authors: Jason M. Hogan, David Scott Johnson, Mark A. KasevichAbstract:The light-pulse Atom Interferometry method is reviewed. Applications of the method to inertial navigation and tests of the Equivalence Principle are discussed.
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how to test Atom and neutron neutrality with Atom Interferometry
Physical Review Letters, 2008Co-Authors: Asimina Arvanitaki, Jason M. Hogan, Savas Dimopoulos, Andrew Geraci, Mark A. KasevichAbstract:We propose an Atom-Interferometry experiment based on the scalar Aharonov-Bohm effect which detects an Atom charge at the 10{sup -28}e level, and improves the current laboratory limits by 8 orders of magnitude. This setup independently probes neutron charges down to 10{sup -28}e, 7 orders of magnitude below current bounds.
Alexandre Bresson - One of the best experts on this subject based on the ideXlab platform.
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Zero-velocity Atom Interferometry using a retroreflected frequency chirped laser
arXiv: Atomic Physics, 2019Co-Authors: Isadora Perrin, N. Zahzam, Alexandre Bresson, Yannick Bidel, Jeanne Bernard, Cédric Blanchard, M. CadoretAbstract: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.
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New concepts of inertial measurements with multi-species Atom Interferometry
Applied Physics B, 2018Co-Authors: Alexis Bonnin, M. Cadoret, N. Zahzam, Yannick Bidel, Clément Diboune, Alexandre BressonAbstract: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.
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Compact and robust laser system for precision Atom Interferometry based on a frequency doubled telecom fiber bench
CLEO: 2015, 2015Co-Authors: Felicie Théron, M. Cadoret, N. Zahzam, Yannick Bidel, Alexandre BressonAbstract: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.
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Narrow linewidth single laser source system for onboard Atom Interferometry
Applied Physics B, 2015Co-Authors: Felicie Théron, O. Carraz, G Renon, M. Cadoret, N. Zahzam, Yannick Bidel, Alexandre BressonAbstract:A compact and robust laser system for Atom Interferometry based on a frequency-doubled telecom laser is presented. Thanks to the original stabilization architecture on a saturated absorption setup, we obtain a frequency agile laser system allowing fast tuning of the laser frequency over 1 GHz in few ms using a single laser source. The different laser frequencies used for Atom Interferometry are generated by changing dynamically the frequency of the laser and by creating sidebands using a phase modulator. A laser system for Rubidium 87 Atom Interferometry using only one laser source based on a frequency-doubled telecom fiber bench is then built. We take advantage of the maturity of fiber telecom technology to reduce the number of free-space optical components (which are intrinsically less stable) and to make the setup compact and much less sensitive to vibrations and thermal fluctuations. This source provides spectral linewidth below 2.5 kHz, which is required for precision Atom Interferometry and particularly for a high performance Atomic inertial sensor.
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Narrow linewidth single laser source system for onboard Atom Interferometry
Applied Physics B: Lasers and Optics, 2014Co-Authors: Felicie Théron, O. Carraz, G Renon, M. Cadoret, N. Zahzam, Yannick Bidel, Alexandre BressonAbstract:A compact and robust laser system for Atom Interferometry based on a frequency-doubled telecom laser is presented. Thanks to the original stabilization architecture on a saturated absorption setup, we obtain a frequency agile laser system allowing fast tuning of the laser frequency over 1 GHz in few ms using a single laser source. The different laser frequencies used for Atom Interferometry are generated by changing dynamically the frequency of the laser and by creating sidebands using a phase modulator. A laser system for Rubidium 87 Atom Interferometry using only one laser source based on a frequency-doubled telecom fiber bench is then built. We take advantage of the maturity of fiber telecom technology to reduce the number of free-space optical components (which are intrinsically less stable) and to make the setup compact and much less sensitive to vibrations and thermal fluctuations. This source provides spectral linewidth below 2.5 kHz, which is required for precision Atom Interferometry and particularly for a high performance Atomic inertial sensor. © 2014 Springer-Verlag Berlin Heidelberg
Mark A. Kasevich - One of the best experts on this subject based on the ideXlab platform.
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precision Atom Interferometry
Conference on Precision Electromagnetic Measurements, 2016Co-Authors: Mark A. KasevichAbstract:Recent advances in Atom optics and Atom Interferometry have enabled observation of Atomic de Broglie wave interference when Atomic wavepackets are separated by distances exceeding 50 cm and times of 2 seconds [1]. With further refinements, these methods may lead to meter-scale superpositions. In addition to providing new tests of quantum mechanics, these methods allow inertial force sensors of unprecedented sensitivity. We will describe methods demonstrated and results obtained in a 10 m Atomic fountain configuration, their implications for technological applications in geodesy, and their relevance to fundamental studies in gravitational physics. We will describe how entangled Atomic ensembles can be used to obtain further performance gains, following our demonstration of 18 dB measurement noise reduction using spin-squeezed Atomic states [2].
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multiaxis inertial sensing with long time point source Atom Interferometry
Physical Review Letters, 2013Co-Authors: Susannah Dickerson, Jason M. Hogan, David Scott Johnson, Alex Sugarbaker, Mark A. KasevichAbstract: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.
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Light-pulse Atom Interferometry
arXiv: Atomic Physics, 2008Co-Authors: Jason M. Hogan, David Scott Johnson, Mark A. KasevichAbstract:The light-pulse Atom Interferometry method is reviewed. Applications of the method to inertial navigation and tests of the Equivalence Principle are discussed.
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how to test Atom and neutron neutrality with Atom Interferometry
Physical Review Letters, 2008Co-Authors: Asimina Arvanitaki, Jason M. Hogan, Savas Dimopoulos, Andrew Geraci, Mark A. KasevichAbstract:We propose an Atom-Interferometry experiment based on the scalar Aharonov-Bohm effect which detects an Atom charge at the 10{sup -28}e level, and improves the current laboratory limits by 8 orders of magnitude. This setup independently probes neutron charges down to 10{sup -28}e, 7 orders of magnitude below current bounds.
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general relativistic effects in Atom Interferometry
Physical Review D, 2008Co-Authors: Savas Dimopoulos, Jason M. Hogan, Peter W Graham, Mark A. KasevichAbstract:Atom Interferometry is now reaching sufficient precision to motivate laboratory tests of general relativity. We begin by explaining the non-relativistic calculation of the phase shift in an Atom interferometer and deriving its range of validity. From this we develop a method for calculating the phase shift in general relativity. This formalism is then used to find the relativistic effects in an Atom interferometer in a weak gravitational field for application to laboratory tests of general relativity. The potentially testable relativistic effects include the non-linear three-graviton coupling, the gravity of kinetic energy, and the falling of light. We propose experiments, one currently under construction, that could provide a test of the principle of equivalence to 1 part in 10{sup 15} (300 times better than the present limit), and general relativity at the 10% level, with many potential future improvements. We also consider applications to other metrics including the Lense-Thirring effect, the expansion of the universe, and preferred frame and location effects.
David L Butts - One of the best experts on this subject based on the ideXlab platform.
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large area Atom Interferometry with frequency swept raman adiabatic passage
Physical Review Letters, 2015Co-Authors: Krish Kotru, David L Butts, Joseph M Kinast, Richard E StonerAbstract: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 2k 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.
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Large-Area Atom Interferometry with Frequency-Swept Raman Adiabatic Passage.
Physical review letters, 2015Co-Authors: Krish Kotru, David L Butts, Joseph M Kinast, Richard E StonerAbstract: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 Atom Interferometry
Journal of The Optical Society of America B-optical Physics, 2013Co-Authors: David L Butts, Joseph M Kinast, Brian P Timmons, Krish Kotru, Antonije M Radojevic, Richard E StonerAbstract: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.
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coherent population trapping in raman pulse Atom Interferometry
Physical Review A, 2011Co-Authors: David L Butts, Joseph M Kinast, Brian P Timmons, Antonije M Radojevic, Richard E StonerAbstract:Raman pulse Atom Interferometry is an important modality for precision measurements of inertial forces and tests of fundamental physics. Typical Raman Atom optics use two coherent laser fields applied at gigahertz-scale detunings from optical resonance, so that spontaneous emission produces a minor or negligible source of decoherence. An additional consequence of spontaneous emission is coherent population trapping (CPT). We show that CPT produces coherences and population differences which induce systematic effects in Raman pulse Atom interferometers. We do not believe that CPT has been previously identified as an error mechanism in Raman pulse Atom Interferometry. We present an experimental characterization of CPT coherences and population differences induced in laser-cooled cesium Atoms by application of Raman pulses at detunings near 1 GHz, commensurate with detunings used in several precision measurement experiments. We are not aware of previous demonstrations of CPT-induced population difference. We argue that CPT effects could induce phase shifts of several milliradians in magnitude for typical experimental parameters and stipulate that these errors can be suppressed by propagation direction reversal in Raman interferometer-based precision measurements.
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light pulse Atom Interferometry at short interrogation times
Journal of The Optical Society of America B-optical Physics, 2011Co-Authors: David L Butts, Joseph M Kinast, Brian P Timmons, Richard E StonerAbstract:The use of cold Atoms in any sensor operating in a dynamic environment requires that the measurement cycle be conducted before the Atom cloud escapes the interaction region. Under multiple-g accelerations it is desirable to complete measurements in millisecond time scales, particularly when laser beams are used to interrogate the Atoms. In this paper, we demonstrate high-contrast Atom Interferometry in a vapor cell using stimulated Raman transitions at millisecond interrogation times. Laser-cooled cesium Atoms are interrogated with a sequence of three Raman pulses and the interferometer phase is read out in the same region in which the Atoms are trapped. Our system achieved over 70% contrast with a Doppler insensitive interferometer and over 30% contrast with a Doppler sensitive interferometer, in an environment normally considered adverse to high-contrast Atom Interferometry (e.g., no retroreflector stabilization and no magnetic shielding). Demonstration of an inertially sensitive Atom interferometer in this environment supports the feasibility of a high-bandwidth inertial sensor using light pulse Atom Interferometry. Finally, we show that Raman pulse population transfer efficiency in our system is primarily limited by nonuniformity of the Raman laser intensity across the Atom cloud.
