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Olson J, Fox RW, Fortier TM, Sheerin TF, Brown RC, Leopardi H, Stoner RE, Oates CW, Ludlow AD. Ramsey-Bordé Matter-Wave Interferometry for Laser Frequency Stabilization at 10^{-16} Frequency Instability and Below. PHYSICAL REVIEW LETTERS 2019; 123:073202. [PMID: 31491125 DOI: 10.1103/physrevlett.123.073202] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Indexed: 06/10/2023]
Abstract
We demonstrate Ramsey-Bordé (RB) atom interferometry for high performance laser stabilization with fractional frequency instability <2×10^{-16} for timescales between 10 and 1000s. The RB spectroscopy laser interrogates two counterpropagating ^{40}Ca beams on the ^{1}S_{0}-^{3}P_{1} transition at 657 nm, yielding 1.6 kHz linewidth interference fringes. Fluorescence detection of the excited state population is performed on the (4s4p) ^{3}P_{1}-(4p^{2}) ^{3}P_{0} transition at 431 nm. Minimal thermal shielding and no vibration isolation are used. These stability results surpass performance from other thermal atomic or molecular systems by 1 to 2 orders of magnitude, and further improvements look feasible.
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Affiliation(s)
- Judith Olson
- Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
- Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
| | - Richard W Fox
- Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Tara M Fortier
- Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Todd F Sheerin
- Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- The Charles Stark Draper Laboratory, Inc., Cambridge, Massachusetts 02139, USA
| | - Roger C Brown
- Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Holly Leopardi
- Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
- Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
| | - Richard E Stoner
- The Charles Stark Draper Laboratory, Inc., Cambridge, Massachusetts 02139, USA
| | - Chris W Oates
- Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Andrew D Ludlow
- Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
- Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
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Asenbaum P, Overstreet C, Kovachy T, Brown DD, Hogan JM, Kasevich MA. Phase Shift in an Atom Interferometer due to Spacetime Curvature across its Wave Function. PHYSICAL REVIEW LETTERS 2017; 118:183602. [PMID: 28524681 DOI: 10.1103/physrevlett.118.183602] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Indexed: 06/07/2023]
Abstract
Spacetime curvature induces tidal forces on the wave function of a single quantum system. Using a dual light-pulse atom interferometer, we measure a phase shift associated with such tidal forces. The macroscopic spatial superposition state in each interferometer (extending over 16 cm) acts as a nonlocal probe of the spacetime manifold. Additionally, we utilize the dual atom interferometer as a gradiometer for precise gravitational measurements.
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Affiliation(s)
- Peter Asenbaum
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - Chris Overstreet
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - Tim Kovachy
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - Daniel D Brown
- School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Jason M Hogan
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - Mark A Kasevich
- Department of Physics, Stanford University, Stanford, California 94305, USA
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