Entanglement-enhanced optical gyroscope

Fink, Matthias; Steinlechner, Fabian; Handsteiner, Johannes; Dowling, Jonathan P.; Scheidl, Thomas; Ursin, Rupert

doi:10.1088/1367-2630/ab1bb2

Cited by 50 publications

(23 citation statements)

References 31 publications

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“…Some theoretical aspects of the present work are similar to those that are presented in the literature [40,41]. However, here we have made significant changes, improvements, and expansions, as follows: (1) we adopted an integrated approach that is arguably more amenable to low-cost high-volume manufacture, compact package, and reduced size than is the fiber optic platform using discrete optics; (2) we operate around 1550 nm using the Spontaneous Four Wave Mixing (SFWM) as a source of entangled photons instead of the Spontaneous Parametric Down Conversion (SPDC), where the pump photons at 405 nm are converted into pairs of signal and idler photons at 810 nm [40];…”

Section: Quantum Photonics For Rotation Sensingsupporting

confidence: 73%

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On-Chip Group-IV Heisenberg-Limited Sagnac Interferometric Gyroscope at Room Temperature

Leonardis

Soref

Carlo

et al. 2020

Sensors

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A room-temperature strip-guided “manufacturable” Silicon-on-Insulator (SOI)/GeSn integrated-photonics quantum-gyroscope chip operating at 1550 nm is proposed and analysed. We demonstrate how the entangled photons generated in Si Spontaneous Four Wave Mixing (SFWM) can be used to improve the resolution of a Sagnac interferometric gyroscope. We propose different integrated architectures based on degenerate and non-degenerate SFWM. The chip comprises several beam splitters, two SFWM entangled photon sources, a pump filter, integrated Mach–Zehnder interferometric gyro, and an array of waveguide coupled GeSn/Ge/Si single-photon avalanche detectors. The laser pumped SWFM sources generate the signal-idler pairs, which, in turn, are used to measure the two-photon, four-photon, and higher order coincidences, resulting in an increasing of the gyro resolution by a factor of two and four, with respect to the classical approach.

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Section: Quantum Photonics For Rotation Sensingsupporting

confidence: 73%

“…Very recently, the interference between counter-propagating modes in the IFOG at different rotational speeds, using the canonical two-photon N00N state (N = 2), has been experimentally demonstrated. This study represents an important step towards the achievement of the super-resolution IFOG [41].…”

Section: Quantum Photonics For Rotation Sensingmentioning

confidence: 98%

On-Chip Group-IV Heisenberg-Limited Sagnac Interferometric Gyroscope at Room Temperature

Leonardis

Soref

Carlo

et al. 2020

Sensors

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“…A notable example is the classical Sagnac experiment where an interferometer is placed on a rotating platform [11][12][13]. More recent experiments include experimental tests of photonic entanglement in accelerated reference frames [14], the demonstration of how to overcome the shot-noise limit using an entanglementenhanced optical gyroscope [15] and the extension of HOM interference to rotating platforms [16].…”

mentioning

confidence: 99%

“…We have plotted P (2) as a function of the angular frequency Ω in Fig. 3 with the interferometer area A = 22.7 m 2 (assuming the photons travel through a 100 m long fibre, wound 35 times along a 0.9 m diameter loop) and µ = 2.36 × 10 15 Hz, corresponding to a typical photon carrier wavelength of 800 nm. Two curves are shown for two different photon bandwidths, σ = 1.47 × 10 13 Hz (blue solid curve) and σ = 1.18 × 10 14 Hz (dashed red curve), corresponding to 5 nm and 40 nm, respectively.…”

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confidence: 99%

Revealing and concealing entanglement with noninertial motion

et al. 2020

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Photon interference and bunching are widely studied quantum effects that have also been proposed for high precision measurements. Here we construct a theoretical description of photoninterferometry on rotating platforms, specifically exploring the relation between non-inertial motion, relativity, and quantum mechanics. On the basis of this, we then propose an experiment where photon entanglement can be revealed or concealed solely by controlling the rotational motion of an interferometer, thus providing a route towards studies at the boundary between quantum mechanics and relativity.

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“…Entangled neutron interferometers of the type described in this paper could be employed to search for the Sagnac effect using a spinentangled beam of massive particles. Such work would complement similar investigations in progress involving entangled photons on entanglement effects in noninertial frames [57][58][59][60].…”

Section: Discussion and Outlookmentioning

confidence: 61%

Operator analysis of contextuality-witness measurements for multimode-entangled single-neutron interferometry

Irfan

Shen

et al. 2020

Phys. Rev. A

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We develop an operator-based description of two types of multimode-entangled single-neutron quantum optical devices: Wollaston prisms and radio-frequency spin flippers in inclined magnetic field gradients. This treatment is similar to the approach used in quantum optics, and is convenient for the analysis of quantum contextuality measurements in certain types of neutron interferometers. We describe operationally the way multimode-entangled single-neutron states evolve in these devices, and provide expressions for the associated operators describing the dynamics, in the limit in which the neutron state space is approximated by a finite tensor product of distinguishable subsystems. We design entangled-neutron interferometers to measure entanglement witnesses for the Clauser, Horne, Shimony and Holt, and Mermin inequalities, and compare the theoretical predictions with recent experimental results. We present the generalization of these expressions to n entangled distinguishable subsystems, which could become relevant in the future if it becomes possible to add neutron orbital angular momentum to the experimentally-accessible list of entangled modes. We view this work as a necessary first step towards a theoretical description of entangled neutron scattering from strongly entangled matter, and we explain why it should be possible to formulate a useful generalization of the usual Van Hove linear response theory for this case. We also briefly describe some other scientific extensions and applications which can benefit from interferometric measurements using the types of single-neutron multimode entanglement described by this analysis.

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Entanglement-enhanced optical gyroscope

Cited by 50 publications

References 31 publications

On-Chip Group-IV Heisenberg-Limited Sagnac Interferometric Gyroscope at Room Temperature

On-Chip Group-IV Heisenberg-Limited Sagnac Interferometric Gyroscope at Room Temperature

Revealing and concealing entanglement with noninertial motion

Operator analysis of contextuality-witness measurements for multimode-entangled single-neutron interferometry

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