Quantum Metrology with a Scanning Probe Atom Interferometer

Ockeloen, Charlotte W.; Schmied, Roman; Riedel, Max F.; Treutlein, Philipp

doi:10.1103/physrevlett.111.143001

Cited by 185 publications

(214 citation statements)

References 48 publications

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“…Other experiments strive for the realization of quantum information processors [32][33][34]. The high sensitivity and micron-scale position control have been used for probing static magnetic [35] and electric [36] fields as well as microwaves [37]. Creating atom interferometers [38] on atom chips is equally appealing.…”

Section: Introductionmentioning

confidence: 99%

Stability of a trapped-atom clock on a chip

et al. 2015

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We present a compact atomic clock interrogating ultracold 87 Rb magnetically trapped on an atom chip. Very long coherence times sustained by spin self-rephasing allow us to interrogate the atomic transition with 85% contrast at 5 s Ramsey time. The clock exhibits a fractional frequency stability of 5.8 × 10 −13 at 1 s and is likely to integrate into the 10 −15 range in less than a day. A detailed analysis of 7 noise sources explains the measured frequency stability. Fluctuations in the atom temperature (0.4 nK shot-to-shot) and in the offset magnetic field (5 × 10 −6 relative fluctuations shot-to-shot) are the main noise sources together with the local oscillator, which is degraded by the 30% duty cycle. The analysis suggests technical improvements to be implemented in a future second generation set-up. The results demonstrate the remarkable degree of technical control that can be reached in an atom chip experiment.

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Section: Introductionmentioning

confidence: 99%

Stability of a trapped-atom clock on a chip

et al. 2015

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“…Research with ultracold (< 1 mK) atoms has greatly expanded our knowledge of quantum many-body physics [1], precision metrology [2], possible time and space variation of fundamental constants [3], and quantum information science [4]. Ultracold molecules are desirable as a powerful extension of these efforts, but also as a promising starting point for entirely new investigations.…”

Section: Introductionmentioning

confidence: 99%

Continuous all-optical deceleration and single-photon cooling of molecular beams

et al. 2014

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Ultracold molecular gases are promising as an avenue to rich many-body physics, quantum chemistry, quantum information, and precision measurements. This richness, which flows from the complex internal structure of molecules, makes the creation of ultracold molecular gases using traditional methods (laser plus evaporative cooling) a challenge, in particular due to the spontaneous decay of molecules into dark states. We propose a way to circumvent this key bottleneck using an alloptical method for decelerating molecules using stimulated absorption and emission with a single ultrafast laser. We further describe single-photon cooling of the decelerating molecules that exploits their high dark state pumping rates, turning the principal obstacle to molecular laser cooling into an advantage. Cooling and deceleration may be applied simultaneously and continuously to load molecules into a trap. We discuss implementation details including multi-level numerical simulations of strontium monohydride (SrH). These techniques are applicable to a large number of molecular species and atoms with the only requirement being an electric dipole transition that can be accessed with an ultrafast laser.

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“…Noise-spectrum information obtainable by quantum probing/sensing is particularly important not only for QI processing [10][11][12][20][21][22] and quantum metrology [23][24][25][26][27] but also for the design of quantum thermal (heat) machines [28][29][30][31][32][33] and, most intriguingly, for biomedical diagnostics based on NMR and MRI [11,[14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Quantum Sensing of Noisy and Complex Systems under Dynamical Control

2016

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Abstract:We review our unified optimized approach to the dynamical control of quantum-probe interactions with noisy and complex systems viewed as thermal baths. We show that this control, in conjunction with tools of quantum estimation theory, may be used for inferring the spectral and spatial characteristics of such baths with high precision. This approach constitutes a new avenue in quantum sensing, dubbed quantum noise spectroscopy.

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Quantum Metrology with a Scanning Probe Atom Interferometer

Cited by 185 publications

References 48 publications

Stability of a trapped-atom clock on a chip

Stability of a trapped-atom clock on a chip

Continuous all-optical deceleration and single-photon cooling of molecular beams

Quantum Sensing of Noisy and Complex Systems under Dynamical Control

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