Effect of a magnetic field gradient and gravitational acceleration on a time-domain grating-echo interferometer

Weel, M.; Chan, I.; Beattie, Scott; Kumarakrishnan, A.; Gosset, David; Yavin, Itay

doi:10.1103/physreva.73.063624

Cited by 16 publications

(25 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The atom fringe contrast ͑and backscattered probe light͒ oscillates with the characteristic Talbot time T = Ł T / v =2d 2 m / h, and this readout mechanism demonstrates 100% contrast even with an "uncollimated cloud" of atoms. Talbot-Lau interferometry with ͑pulsed͒ light gratings has also been explored by Deng et al ͑1999͒;Cohen et al ͑2000͒;Turlapov et al ͑2003, 2005͒;Wu, Su, et al ͑2005͒;Weel et al ͑2006͒.…”

Section: Talbot-lau (Near-field) Interferometermentioning

confidence: 99%

Optics and interferometry with atoms and molecules

2009

View full text Add to dashboard Cite

Interference with atomic and molecular matter waves is a rich branch of atomic physics and quantum optics. It started with atom diffraction from crystal surfaces and the separated oscillatory fields technique used in atomic clocks. Atom interferometry is now reaching maturity as a powerful art with many applications in modern science. In this review the basic tools for coherent atom optics are described including diffraction by nanostructures and laser light, three-grating interferometers, and double wells on atom chips. Scientific advances in a broad range of fields that have resulted from the application of atom interferometers are reviewed. These are grouped in three categories: ͑i͒ fundamental quantum science, ͑ii͒ precision metrology, and ͑iii͒ atomic and molecular physics. Although some experiments with Bose-Einstein condensates are included, the focus of the review is on linear matter wave optics, i.e., phenomena where each single atom interferes with itself.

show abstract

Section: Talbot-lau (Near-field) Interferometermentioning

confidence: 99%

Optics and interferometry with atoms and molecules

2009

View full text Add to dashboard Cite

show abstract

“…Whereas Ref. [32] considered a single magnetic sublevel, the extension of the theoretical treatment to a manifold of ground state magnetic sublevels is discussed in Refs. [31,34,41].…”

Section: Theorymentioning

confidence: 99%

“…In this paper, we describe sensitive measurements of the total acceleration, a, along the axis of excitation using two configurations of a single-state, time-domain AI [30][31][32][33][34] that rely on echo techniques and utilized samples of laser-cooled Rb atoms released from a magneto-optical trap (MOT). The echo AI, which is sensitive to the absolute acceleration, uses a single excitation frequency and does not require velocity selection.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Demonstration of improved sensitivity of echo interferometers to gravitational acceleration

Mok¹,

Barrett²,

Carew³

et al. 2013

Phys. Rev. A

Self Cite

View full text Add to dashboard Cite

We have developed two configurations of an echo interferometer that rely on standing wave excitation of a laser-cooled sample of rubidium atoms. Both configurations can be used to measure acceleration a along the axis of excitation. For a two-pulse configuration, the signal from the interferometer is modulated at the recoil frequency and exhibits a sinusoidal frequency chirp as a function of pulse spacing. In comparison, for a three-pulse stimulated echo configuration, the signal is observed without recoil modulation and exhibits a modulation at a single frequency as a function of pulse spacing. The three-pulse configuration is less sensitive to effects of vibrations and magnetic field curvature leading to a longer experimental timescale. For both configurations of the atom interferometer (AI), we show that a measurement of acceleration with a statistical precision of 0.5% can be realized by analyzing the shape of the echo envelope that has a temporal duration of a few microseconds. Using the two-pulse AI, we obtain measurements of acceleration that are statistically precise to 6 parts per million (ppm) on a 25 ms timescale. In comparison, using the three-pulse AI, we obtain measurements of acceleration that are statistically precise to 0.4 ppm on a timescale of 50 ms. A further statistical enhancement is achieved by analyzing the data across the echo envelope so that the statistical error is reduced to 75 parts per billion (ppb). The inhomogeneous field of a magnetized vacuum chamber limited the experimental timescale and resulted in prominent systematic effects. Extended timescales and improved signal-to-noise ratio observed in recent echo experiments using a non-magnetic vacuum chamber suggest that echo techniques are suitable for a high precision measurement of gravitational acceleration g. We discuss methods for reducing systematic effects and improving the signal-to-noise ratio. Simulations of both AI configurations with a timescale of 300 ms suggest that an optimized experiment with improved vibration isolation and atoms selected in the mF = 0 state can result in measurements of g statistically precise to 0.3 pbb for the two-pulse AI and 0.6 ppb for the three-pulse AI.

show abstract

“…Although others have proposed and shown magnetic sensitivity using atom interferometers [4,[8][9][10][11][12], here, we present a bandwidth-tunable magnetometer which is capable of frequency-discrimination of out-of-band magnetic background noise. In a magnetically shielded room, background magnetic fields can be filtered below 1 fT/Hz −1/2 [13,14].…”

Section: Introductionmentioning

confidence: 98%

A frequency selective atom interferometer magnetometer

Braje

DeSavage²,

Adler

et al. 2014

Journal of Modern Optics

View full text Add to dashboard Cite

In this article, we discuss the magnetic-field frequency selectivity of a time-domain interferometer based on the number and timing of intermediate π pulses. We theoretically show that by adjusting the number of π pulses and the π -pulse timing, we can control the frequency selectivity of the interferometer to time varying and DC magnetic fields. We present experimental data demonstrating increased coherence time due to bandwidth filtering with the inclusion of a π pulse between the initial and final π/2 pulses, which mitigates sensitivity to low frequency magnetic fields.

show abstract

Effect of a magnetic field gradient and gravitational acceleration on a time-domain grating-echo interferometer

Cited by 16 publications

References 27 publications

Optics and interferometry with atoms and molecules

Optics and interferometry with atoms and molecules

Demonstration of improved sensitivity of echo interferometers to gravitational acceleration

A frequency selective atom interferometer magnetometer

Contact Info

Product

Resources

About