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Atom interferometry via Raman chirped adiabatic passage

Kotru, Butts, Kinast +4 more

Conference on Lasers and Electro-OpticsJan 1, 20120 citations

Applications of chirped Raman adiabatic rapid passage to atom interferometry

Krish Kotru, David L. Butts, Joseph M. Kinast +4 more

Bulletin of the American Physical SocietyFeb 27, 20120 citations

IMPROVED ATOM INTERFEROMETER PERFORMANCE USING COUNTERINTUITIVE STIMULATED RAMAN ADIABATIC PASSAGE

Tatasciore, Branden

Atom interferometers depend on light/matter interactions and are extremely sensitive sensors capable of being employed as accelerometers, rotation sensors, and gravity and magnetic gradiometers. Typical interferometers use a well-known velocity (generally from atoms launched out of an atomic trap) to interferometrically measure quantities of interest (e.g., acceleration and rotation). This thesis evaluates the effects of atom velocity in an atom interferometer sensor that exists at NPS, which uses a continuous beam of cold rubidium atoms with a narrow but not monochromatic range of velocities passing through continuous laser fields. The atom’s velocity dictates the interaction time between the atom and laser. However, this combination results in pulse errors due to velocity averaging. One method to counteract these pulse errors uses the so-called counterintuitive laser arrangement—a method known as stimulated Raman adiabatic passage (STIRAP). STIRAP will be shown to be a more robust approach. Starting with the atoms in one of the ground states, all or a portion of the atoms can be transferred to the other ground state in a well-controlled manner. Changes in acceleration and rotation can be sensed with very high precision by a detection laser resulting in applicability as a highly sensitive accelerometer or gyroscope. This project explores experimentally and theoretically the utility of counterintuitive pulse sequences for atom interferometry applications.Atom interferometers depend on light/matter interactions and are extremely sensitive sensors capable of being employed as accelerometers, rotation sensors, and gravity and magnetic gradiometers. Typical interferometers use a well-known velocity (generally from atoms launched out of an atomic trap) to interferometrically measure quantities of interest (e.g., acceleration and rotation). This thesis evaluates the effects of atom velocity in an atom interferometer sensor that exists at NPS, which uses a continuous beam of cold rubidium atoms with a narrow but not monochromatic range of velocities passing through continuous laser fields. The atom’s velocity dictates the interaction time between the atom and laser. However, this combination results in pulse errors due to velocity averaging. One method to counteract these pulse errors uses the so-called counterintuitive laser arrangement—a method known as stimulated Raman adiabatic passage (STIRAP). STIRAP will be shown to be a more robust approach. Starting with the atoms in one of the ground states, all or a portion of the atoms can be transferred to the other ground state in a well-controlled manner. Changes in acceleration and rotation can be sensed with very high precision by a detection laser resulting in applicability as a highly sensitive accelerometer or gyroscope. This project explores experimentally and theoretically the utility of counterintuitive pulse sequences for atom interferometry applications.

Dec 1, 20200 citations

Robust large-momentum-transfer atom interferometry with Raman adiabatic rapid passage

Xiaoli Chen, Si-Bin Lu, Chuan Dong Sun +8 more

Optics CommunicationsAug 24, 20241 citation

Chirped-light-field atomic-beam splitter for atom interferometry

Y. B. Band

I propose a coherent atomic-beam splitter that can be used for atom interferometry. Chirped adiabatic passage between states of the atoms of the atomic beam is employed as they pass through a standing-wave radiation field to split coherently the atomic beam.

Physical Review AJun 1, 19936 citations

Large-Area Atom Interferometry with Frequency-Swept Raman Adiabatic Passage

Krish Kotru, David L. Butts, Joseph M. Kinast +1 more

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.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.

Physical Review LettersAug 31, 201561 citations

Atom Interferometry via Raman Chirped Adiabatic Passage

Abstract

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Atom Interferometry via Raman Chirped Adiabatic Passage

Abstract

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