Multiaxis atom interferometry with a single-diode laser and a pyramidal magneto-optical trap

Wu, Xuejian; Zi, Fei; Dudley, Jordan; Ryan, Bilotta,; Canoza, Philip; Müller, Holger

doi:10.1364/optica.4.001545

Cited by 102 publications

(81 citation statements)

References 56 publications

(68 reference statements)

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“…The method presented here has been carefully designed to detect atoms in the lattice clock with large signal to noise and small perturbation to the atomic state. The signal is found to be linear in atom number over a wide range, enabling the use of large samples N 10 4 where the potential stability gains from spin squeezing are greatest. Although technical noise sources in our implementation of the scheme have so far prevented reaching a signal to noise compatible with spin squeezing, we realize the first demonstration of recycling of atoms after detection.…”

Section: Introductionmentioning

confidence: 99%

Cavity-enhanced non-destructive detection of atoms for an optical lattice clock

Hobson¹,

Bowden²,

Vianello³

et al. 2019

Opt. Express

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We demonstrate a new method of cavity-enhanced non-destructive detection of atoms for a strontium optical lattice clock. The detection scheme is shown to be linear in atom number up to at least 2 × 10 4 atoms, to reject technical noise sources, to achieve signal to noise ratio close to the photon shot noise limit, to provide spatially uniform atom-cavity coupling, and to minimize inhomogeneous ac Stark shifts. These features enable detection of atoms with minimal perturbation to the atomic state, a critical step towards realizing an ultra-high-stability, quantum-enhanced optical lattice clock.

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Section: Introductionmentioning

confidence: 99%

Cavity-enhanced non-destructive detection of atoms for an optical lattice clock

Hobson¹,

Bowden²,

Vianello³

et al. 2019

Opt. Express

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“…Such a small bias would lead to Schuler position oscillations only 60 mm in amplitude. For future studies, the modest interrogation times of our AI will permit operation along multiple axes [46,47] and in mobile environments with accelerations in the 0−2 g range. The KF method presented here can also be extended to other AI configurations such as gyroscopes [48] or gradiometers [49], or for the differential phase ex-traction in dual-species tests of the equivalence principle [5,35,50].…”

mentioning

confidence: 99%

Navigation-Compatible Hybrid Quantum Accelerometer Using a Kalman Filter

et al. 2018

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Long-term inertial navigation is currently limited by the bias drifts of gyroscopes and accelerometers. Ultra-stable cold-atom interferometers offer a promising alternative for the next generation of high-end navigation systems. Here, we present an experimental setup and an algorithm hybridizing a stable matter-wave interferometer with a classical accelerometer. We use correlations between the quantum and classical devices to track the bias drift of the latter and form a hybrid sensor. We apply the Kalman filter formalism to obtain an optimal estimate of the bias and simulate experimentally a harsh environment representative of that encountered in mobile sensing applications. We show that our method is more precise and robust than traditional sine-fitting methods. The resulting sensor exhibits a 400 Hz bandwidth and reaches a stability of 10 ng after 11 h of integration.Inertial navigation systems determine the position of a moving vehicle by continuously measuring its acceleration and rotation rate, and subsequently integrating the equations of motion [1]. These systems are limited by slow drifts of the biases inherent to their inertial sensors, which ultimately lead to large speed and position errors after integration. Currently, the long-term bias stability of navigation-grade accelerometers is on the order of 10 µg-which, in the absence of aiding sensors such as satellite navigation systems, leads to horizontal position oscillations of 60 m at the characteristic Schuler period of 84.4 minutes [1,2].Since their first demonstration in the early 1990s, atom interferometers (AIs) have proven to be excellent absolute inertial sensors-having been exploited as ultra-high sensitivity instruments for fundamental tests of physics [3][4][5][6][7][8], and as state-of-the-art gravimeters with accuracies in the range of 1 − 10 ng achieved both in laboratories [9][10][11][12][13][14] and with compact transportable systems [15][16][17][18][19]. As a result, they have been proposed for the next generation of inertial navigation systems [20][21][22][23]. However, cold-atom-based sensors generally possess a small bandwidth, and suffer from low repetition rates (with the exceptions of Refs. [24,25]) and dead times during which no inertial measurements can be made. In comparison, mechanical accelerometers exhibit broad bandwidths compatible with navigation applications [26], but are afflicted by long-term bias and scale factor drifts. These two types of sensors can thus be hybridized [27] in order to benefit from the best of both worlds-in strong analogy with the strategy employed in atomic clocks [28].Here, we use correlations between an AI and a classical accelerometer to track the bias of the latter, and we present an approach based on a non-linear Kalman *

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“…Both grating and pyramidal MOTs have been demonstrated to trap large numbers of atoms [16][17][18][19][20] and cool them below the Doppler limit [17,18,[20][21][22]. Pyramidal MOTs have been made into single-beam atom interferometers [17,20] and are being developed into compact atomic clocks [23,24]. Grating MOTs have found use as magnetometers [25] and electron beam sources [26].…”

Section: Introductionmentioning

confidence: 99%

Single-Beam Zeeman Slower and Magneto-Optical Trap Using a Nanofabricated Grating

et al. 2019

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We demonstrate a compact (0.25 L) system for laser cooling and trapping atoms from a heated dispenser source. Our system uses a nanofabricated diffraction grating to generate a magnetooptical trap (MOT) using a single input laser beam. An aperture in the grating allows atoms from the dispenser to be loaded from behind the chip, increasing the interaction distance of atoms with the cooling light. To take full advantage of this increased distance, we extend the magnetic field gradient of the MOT to create a Zeeman slower. The MOT traps approximately 10 6 7 Li atoms emitted from an effusive source with loading rates greater than 10 6 s −1 . Our design is portable to a variety of atomic and molecular species and could be a principal component of miniaturized cold-atom-based technologies.

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Multiaxis atom interferometry with a single-diode laser and a pyramidal magneto-optical trap

Cited by 102 publications

References 56 publications

Cavity-enhanced non-destructive detection of atoms for an optical lattice clock

Cavity-enhanced non-destructive detection of atoms for an optical lattice clock

Navigation-Compatible Hybrid Quantum Accelerometer Using a Kalman Filter

Single-Beam Zeeman Slower and Magneto-Optical Trap Using a Nanofabricated Grating

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