Testing General Relativity with Atom Interferometry

Dimopoulos, Savas; Graham, Peter W.; Hogan, Jason; Kasevich, Mark A.

doi:10.1103/physrevlett.98.111102

Cited by 336 publications

(380 citation statements)

References 34 publications

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“…Further increases to the sensitivity of atom interferometers would allow for some exciting science, such as improved tests of the weak equivalence principle [16][17][18], searches for quantum gravitational effects [19], and the measurement of gravitational waves [20,21]. Current state-of-the-art atom interferometers utilize uncorrelated sources, which can operate no better than the standard quantum limit (SQL)-i.e., the sensitivity scales as 1/ √ N where N is the number of detected atoms.…”

Section: Introductionmentioning

confidence: 99%

Squeezed-light-enhanced atom interferometry below the standard quantum limit

et al. 2014

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We investigate the prospect of enhancing the phase sensitivity of atom interferometers in the Mach-Zehnder configuration with squeezed light. Ultimately, this enhancement is achieved by transferring the quantum state of squeezed light to one or more of the atomic input beams, thereby allowing operation below the standard quantum limit. We analyze in detail three specific schemes that utilize (1) single-mode squeezed optical vacuum (i.e., low-frequency squeezing), (2) two-mode squeezed optical vacuum (i.e., high-frequency squeezing) transferred to both atomic inputs, and (3) two-mode squeezed optical vacuum transferred to a single atomic input. Crucially, our analysis considers incomplete quantum state transfer (QST) between the optical and atomic modes, and the effects of depleting the initially prepared atomic source. Unsurprisingly, incomplete QST degrades the sensitivity in all three schemes. We show that by measuring the transmitted photons and using information recycling [Phys. Rev. Lett. 110, 053002 (2013)], the degrading effects of incomplete QST on the sensitivity can be substantially reduced. In particular, information recycling allows scheme (2) to operate at the Heisenberg limit irrespective of the QST efficiency, even when depletion is significant. Although we concentrate on Bosecondensed atomic systems, our scheme is equally applicable to ultracold thermal vapors.

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Section: Introductionmentioning

confidence: 99%

Squeezed-light-enhanced atom interferometry below the standard quantum limit

et al. 2014

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“…[1], a 3 parts per billion (ppb) modulation in local gravity leads to a 1% shift of the interference fringe. They thus make excellent microscopes for small signals that have been applied in many cutting-edge precision measurements [1][2][3][4][5][6][7][8][9][10]. Large-momentum transfer (LMT) beam splitters, which have become practical recently [11], promise to increase the sensitivity further, by factors of 10s to 100s, by increasing the space-time area enclosed between the interferometer arms.…”

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confidence: 99%

“…We use this to demonstrate a 2,500-fold increase in the enclosed space-time area of interferometers with 20-photon momentum transfer, without a reduction in contrast. This paves the path towards strongly enhanced sensitivity in measurements of fundamental constants [8,9,15], tests of general relativity [1] or the equivalence principle [10], and detection of gravitational waves [16].…”

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confidence: 99%

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Noise-Immune Conjugate Large-Area Atom Interferometers

et al. 2009

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We present a pair of simultaneous conjugate Ramsey-Bordé atom interferometers (SCI) using large (20hk)-momentum transfer (LMT) beam splitters, wherehk is the photon momentum. Simultaneous operation allows for common-mode rejection of vibrational noise. This allows us to surpass the enclosed space-time area of previous interferometers with a splitting of 20hk by a factor of 2,500.Among applications, we demonstrate a 3.4 ppb resolution in the fine structure constant and discuss tests of fundamental laws of physics.

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“…More recently, this mixture has been used in atom interferometry experiments where a second species can be used to remove common mode noise or test the weak equivalence principle [49][50][51][52][53][54].…”

Section: Mixtures Of 85 Rb-87 Rbmentioning

confidence: 99%

Species-selective confinement of atoms dressed with multiple radiofrequencies

Bentine

Harte

Luksch

et al. 2017

J. Phys. B: At. Mol. Opt. Phys.

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Abstract.Methods to manipulate the individual constituents of an ultracold quantum gas mixture are essential tools for a number of applications, for example the direct quantum simulation of impurity physics. We investigate a scheme in which species-selective control is achieved using magnetic potentials dressed with multiple radiofrequencies, exploiting the different Landé g F -factors of the constituent atomic species. We describe a mixture dressed with two frequencies, where atoms are confined in harmonic potentials with a controllable degree of overlap between the two atomic species. This is then extended to a four radiofrequency scheme in which a double well potential for one species is overlaid with a single well for the other. The discussion is framed with parameters that are suitable for a 85 Rb and 87 Rb mixture, but is readily generalised to other combinations.arXiv:1701.05819v1 [cond-mat.quant-gas]

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Testing General Relativity with Atom Interferometry

Cited by 336 publications

References 34 publications

Squeezed-light-enhanced atom interferometry below the standard quantum limit

Squeezed-light-enhanced atom interferometry below the standard quantum limit

Noise-Immune Conjugate Large-Area Atom Interferometers

Species-selective confinement of atoms dressed with multiple radiofrequencies

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