Erratum: Quantum Noise Limited and Entanglement-Assisted Magnetometry [Phys. Rev. Lett.<b>104</b>, 133601 (2010)]

Wasilewski, Wojciech; Jensen, Kasper; Krauter, Hanna; Renema, Jelmer J.; Balabas, M. V.; Polzik, E. S.

doi:10.1103/physrevlett.104.209902

Cited by 144 publications

(225 citation statements)

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“…However, the reduced volume-to-surface ratio in a small vapor cell increases the wall collision rate and limits the device performance. This limitation has lead to a renewed interest in coating technology [8,9] and effects related to spectroscopy in wall-coated cells [10].…”

Section: Introductionmentioning

confidence: 99%

Light effects in the atomic-motion-induced Ramsey narrowing of dark resonances in wall-coated cells

et al. 2010

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We report on light shift and broadening in the atomic-motion-induced Ramsey narrowing of dark resonances prepared in alkali-metal vapors contained in wall-coated cells without buffer gas. The atomic-motion-induced Ramsey narrowing is due to the free motion of the polarized atomic spins in and out of the optical interaction region before spin relaxation. As a consequence of this effect, we observe a narrowing of the dark resonance linewidth as well as a reduction of the ground states' light shift when the volume of the interaction region decreases at constant optical intensity. The results can be intuitively interpreted as a dilution of the intensity effect similar to a pulsed interrogation due to the atomic motion. Finally the influence of this effect on the performance of compact atomic clocks is discussed.

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Section: Introductionmentioning

confidence: 99%

Light effects in the atomic-motion-induced Ramsey narrowing of dark resonances in wall-coated cells

et al. 2010

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“…With the emergence of stochastic Schrödinger and master equations, which determine the quantum state conditioned on the full, noisy detection signals, it has been a natural next step to develop strategies to extract information from continuously probed systems. Immediate applications then concern sensing of the magnitude of perturbations acting on the system, such as the magnetic field probed in atomic magnetometers [7,8], and near field effects, e.g., from nuclear spins, probed by a single NV-center in diamond [9,10]. Theoretical strategies have been proposed to continuously update parameter estimates based on the acquired data in a Bayesian manner on equal footing with the conditioned quantum state of the probe system, [11,12].…”

Section: Introductionmentioning

confidence: 99%

Bayesian parameter inference from continuously monitored quantum systems

2013

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We review the introduction of likelihood functions and Fisher information in classical estimation theory, and we show how they can be defined in a very similar manner within quantum measurement theory. We show that the stochastic master equations describing the dynamics of a quantum system subject to a definite set of measurements provides likelihood functions for unknown parameters in the system dynamics, and we show that the estimation error, given by the Fisher information, can be identified by stochastic master equation simulations. For large parameter spaces we describe and illustrate the efficient use of Markov Chain Monte Carlo sampling of the likelihood function.

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“…BAE techniques have previously been discussed for two coupled mechanical oscillators [16] and optomechanical systems [17,18], and demonstrated for two atomic spin ensembles [19]. In a recent theoretical work [20], the concept has been extended to the collective modes of two uncoupled mechanical oscillators, each independently coupled to an electromagnetic cavity.…”

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confidence: 99%

Quantum Backaction Evading Measurement of Collective Mechanical Modes

Ockeloen-Korppi¹,

Damskägg²,

Pirkkalainen³

et al. 2016

Phys. Rev. Lett.

108

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The standard quantum limit constrains the precision of an oscillator position measurement. It arises from a balance between the imprecision and the quantum back-action of the measurement. However, a measurement of only a single quadrature of the oscillator can evade the back-action and be made with arbitrary precision. Here we demonstrate quantum back-action evading measurements of a collective quadrature of two mechanical oscillators, both coupled to a common microwave cavity. The work allows for quantum state tomography of two mechanical oscillators, and provides a foundation for macroscopic mechanical entanglement and force sensing beyond conventional quantum limits.

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Erratum: Quantum Noise Limited and Entanglement-Assisted Magnetometry [Phys. Rev. Lett.104, 133601 (2010)]

Cited by 144 publications

References 1 publication

Light effects in the atomic-motion-induced Ramsey narrowing of dark resonances in wall-coated cells

Light effects in the atomic-motion-induced Ramsey narrowing of dark resonances in wall-coated cells

Bayesian parameter inference from continuously monitored quantum systems

Quantum Backaction Evading Measurement of Collective Mechanical Modes

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