A5047199968- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Frequency and Time Standards
- Advanced Materials Characterization Techniques
- Atomic and Subatomic Physics Research
- Electronic and Structural Properties of Oxides
- Orbital Angular Momentum in Optics
- Geophysics and Sensor Technology
- Quantum Information and Cryptography
- Electrochemical Analysis and Applications
- Cloud Computing and Resource Management
- Quantum Computing Algorithms and Architecture
- Force Microscopy Techniques and Applications
- Quantum Mechanics and Applications
- Strong Light-Matter Interactions
- Molecular Junctions and Nanostructures
- Advanced Fiber Laser Technologies
- Mechanical and Optical Resonators
- Photonic Crystal and Fiber Optics
- Radioactive Decay and Measurement Techniques
- Noncommutative and Quantum Gravity Theories
Leibniz University Hannover
2020-2024
Inertial sensors based on cold atoms have great potential for navigation, geodesy, or fundamental physics. Similar to the Sagnac effect, their sensitivity increases with space-time area enclosed by interferometer. Here, we introduce twin-lattice atom interferometry exploiting Bose-Einstein condensates. Our method provides symmetric momentum transfer and large areas in palm-sized sensor heads a performance similar present meter-scale devices.
Bloch oscillations of atoms in optical lattices are a powerful technique that can dramatically boost the sensitivity atom interferometers to wide range signals by large momentum transfer. To leverage this method its full potential, an accurate theoretical description losses and phases is required, going beyond existing treatments. Here, we present comprehensive framework for Bloch-oscillation-enhanced interferometry verify accuracy through comparison with numerical solution Schrödinger...
Large-momentum-transfer (LMT) atom interferometers using elastic Bragg scattering on light waves are among the most precise quantum sensors to date. To advance their accuracy from mrad μrad regime, it is necessary understand rich phenomenology of interferometer, which differs significantly that a standard two-mode interferometer. We develop an analytic model for interferometer signal and demonstrate its comprehensive numerical simulations. Our treatment allows determination atomic projection...
We present a systematic approach to determine all relativistic phases up $\mathcal{O}({c}^{\ensuremath{-}2})$ in light-pulse atom interferometers weakly curved spacetime that are based on elastic scattering---namely, Bragg diffraction and Bloch oscillations. Our analysis is derived from first principles using the parametrized post-Newtonian formalism. In treatment developed here, we derive algebraic expressions for arbitrary interferometer geometries an automated manner. As case studies,...
Abstract Quantum sensors based on light pulse atom interferometers allow for measurements of inertial and electromagnetic forces such as the accurate determination fundamental constants fine structure constant or testing foundational laws modern physics equivalence principle. These schemes unfold their full performance when large interrogation times and/or momentum transfer can be implemented. In this article, we demonstrate how interferometry benefit from use Bose–Einstein condensed sources...
High-fidelity Bragg pulses are an indispensable tool for state-of-the-art atom interferometry experiments. In this paper, we introduce analytic theory such pulses. Our is based on the pivotal insight that physics of can be accurately described by adiabatic theorem. We show efficient diffraction possible with any smooth and pulse shape high-fidelity Gaussian exclusively adiabatic. results give strong evidence adiabaticity according to theorem a necessary requirement high-performance model...
Bloch oscillations of atoms in optical lattices are a powerful technique that can boost the sensitivity atom interferometers to wide range signals by large momentum transfer. To leverage this method its full potential, an accurate theoretical description losses and phases is needed going beyond existing treatments. Here, we present comprehensive framework for Bloch-oscillation-enhanced interferometry verify accuracy through comparison with exact numerical solution Schr\"odinger equation. Our...
Atom interferometers are sensitive to a wide range of forces by encoding their signals in interference patterns matter waves. To estimate the magnitude these forces, underlying phase shifts they imprint on atoms must be extracted. Up until now, extraction algorithms typically rely fixed model patterns' spatial structure, which if inaccurate can lead systematic errors caused by, for example, wavefront aberrations used lasers. In this paper we employ an algorithm based Principal Component...
This paper explores the sensitivity gains afforded by spin-squeezed states in atom interferometry, particular using Bragg diffraction. We introduce a generalised input-output formalism that accurately describes realistic, non-unitary interferometers, including losses due to velocity selectivity and scattering into undesired momentum states. is applied evaluate performance of one-axis twisted improving phase sensitivity. Our results show carefully optimising parameters beam splitters...
We propose a straightforward implementation of the phenomenon diffractive focusing with uniform atomic Bose-Einstein condensates.Both, analytical as well numerical methods not only illustrate influence atom-atom interaction on factor and focus time, but also allow us to derive optimal conditions for observing this type in case interacting matter waves.
In this article, we introduce a universal simulation framework covering all regimes of matter-wave light-pulse elastic scattering. Applied to atom interferometry as study case, simulator solves the atom-light diffraction problem in i.e., when internal state atoms remains unchanged. Taking perspective, beam splitting is interpreted space and time-dependent external potential. shift from usual approach based on system momentum-space ordinary differential equations, our position-space treatment...
We present a systematic approach to determine all relativistic phases up $\mathcal{O}(c^{-2})$ in light-pulse atom interferometers weakly curved spacetime that are based on elastic scattering, namely Bragg diffraction and Bloch oscillations. Our analysis is derived from first principles using the parameterized post-Newtonian formalism. In treatment developed here, we derive algebraic expressions for arbitrary interferometer geometries an automated manner. As case studies, consider symmetric...
Large-momentum-transfer~(LMT) atom interferometers using elastic Bragg scattering on light waves are among the most precise quantum sensors to date. To advance their accuracy from mrad $μ$rad regime, it is necessary understand rich phenomenology of interferometer, which differs significantly that a standard two-mode interferometer. We develop an analytic model for interferometer signal and demonstrate its comprehensive numerical simulations. Our treatment allows determination atomic...