Conveners
Precision and Quantum Sensing Workshop: PQS 1 - Keynote Session 1
- Warwick Bowen (The University of Queensland)
Precision and Quantum Sensing Workshop: PQS 2 - Magnetometry 1
- John Close (Australian National University)
Precision and Quantum Sensing Workshop: PQS 3 - Keynote Session 2
- Scott Foster (Defence Science and Technology Group)
Precision and Quantum Sensing Workshop: PQS 4 - Magnetometry 2
- Ania Bleszynski Jayich (University of California, Santa Barbara)
Precision and Quantum Sensing Workshop: PQS 5 - Atomic and Optical Clocks
- Andre Luiten (The University of Adelaide, QuantX Labs)
Precision and Quantum Sensing Workshop: PQS 6 - Magnetometry 3
- Susannah Jones (UK Defence, Science and Technology Laboratory)
Precision and Quantum Sensing Workshop: PQS 7 - Quantum Imaging
- Elizaveta Klantsataya (University of Adelaide)
Precision and Quantum Sensing Workshop: PQS 8 - Other Precision and Quantum Sensors
- Glen Harris (University of Queensland)
In this keynote address, I will discuss opportunities for quantum innovation in Australia, barriers that need to be overcome, and strategies to build a strong quantum ecosystem to drive research up the value chain.
Today’s challenge is to design compact, robust and mobile sensors which will lead to new generations of atomic sensors for mobile gravity mapping and GPS free navigation.
I present diamond optomechanical systems with high mechanical and optical quality factors and long spin coherence times of the embedded, strain-coupled defect centers. Progress towards reaching high spin-phonon quantum cooperativity is discussed.
We demonstrate a microscopy technique that employs spin defects in hexagonal boron nitride as quantum sensors to perform magnetic and temperature imaging of van der Waals materials.
We describe a measurement and reconstruction method for performing optical magnetometry in an ultracold atomic vapour, making use of Hilbert transform-based FM demodulation to perform instantaneous retrieval of the Larmor phase and allowing calibration-free measurement of the field.
We experimentally demonstrate a quantum compressive waveform sensor. We reconstruct a synthesised neural magnetic waveform using an incomplete set of frequency measurements made by radio frequency dressed atoms. Reconstruction is achieved via convex optimisation.
A discussion on utilising a dressed three level system as a magnetometer at ultra low frequencies, in the presence of dominating line noise.
We implemented nanofabrication to obtain an on-chip optomechanical magnetometer integrated with off-the-shelf laser and photodetector. Here we show the fabrication process and performance of our sensor.
We explore and seek to define the standard quantum limit for metrology with optical frequency combs where the cyclostationary nature of the comb light impacts the shot-noise limited signal-to-noise ratio.
System engineering quantum technology for defence applications, an overview of the Ministry of Defences (MoD) Defence science and technology laboratory (Dstl) quantum research portfolio.
We will discuss work ongoing within the US Air Force Research Laboratory developing supporting technologies, solid-state qubit materials and sensing approaches to realize and miniaturize ambient and room temperature quantum sensors.
We use nitrogen-vacancy (NV) centers implanted directly into the culet of diamond anvil cells (DACs) in order to directly measure the magnetic field generated by samples at extremely high pressures. This allows for a direct study of high-pressure superconductivity.
I will report on our demonstration of dc magnetometry that exceeds the sensitivity of $T_2^\ast$-limited Ramsey sensing by more than an order of magnitude. Our work demonstrates that diamond magnetometry below the $T_2^\ast$ limit is possible.
See abstract in attached word document.
In this talk, we present our approach toward the establishment of a full vector magnetometer using the nitrogen-vacancy defect center in diamond.
We demonstrate the in- and out-of-lab performance of the first automated, portable, dual-colour two-photon optical rubidium clock with integrated comb. Fractional frequency instabilities of $1.3\times10^{-13}/\sqrt{\tau}$ for $1\text{s}<\tau<1000\text{s}$, crossing the $10^{-15}$ regime at $\tau=200$s, are achieved.
We report on progress towards a compact Ytterbium cold atom trap system, including the fabrication of grating magneto-optical trap chips and compact ovens. The aim is to develop a high-performance field deployable optical clock.
We develop an analytic model for atomic beam clocks, incorporating a realistic laser profile with wavefront curvature. Our model explains previous empirical observations about signal optimisation and enables further optimisation of stability and accuracy.
We demonstrate the first measurement of the 10-mHz wide ytterbium clock transition to be made on an atomic beam, and report on the development of a portable optical atomic clock based on this technique.
We demonstrate quantum time transfer using correlated photons over a 100 m free-space link with picosecond resolution. We present our latest results showing the effects of loss and noise on our quantum clock synchronisation protocol.
We present offset decoding in digitally enhanced interferometry using a a new pseudo random noise code called A1 code that leverages the benefits of traditionally used m-sequences and provides additional noise cancellation that enhances the phase fidelity of signal recovered.
We present a deployable underwater atomic magnetometer that enables novel approaches to magnetic anomaly detection. We demonstrate that a pair of these magnetometers can detect a surface craft passing 15m above the submerged sensors.
This talk reviews fabrication strategies to embed diamond particles in fibres with respect to diamond and fibre properties and enhancing magnetic field sensitivity.
The ability to monitor weak magnetic fields is a key objective in long-term surveillance. Here I will discuss the fabrication and characterization of an intrinsically magneto-sensitive diamond doped optical fibre with potential applications as a high-efficiency remote magnetic sensing platform.
In this work, we explore how isotopic enrichment of diamond materials can benefit quantum diamond magnetometers. This is implemented by engineering CVD-grown material and conducting characterization of their properties in order to evaluate the impact on their overall magnetic sensitivities.
I will discuss recent advances in quantum imaging, and show how optimal measurement techniques that can allow us to surpass direct imaging precisions by several orders of magnitude.
Widespread adoption of wide-field nitrogen-vacancy microscopy amongst the scientific community is hindered by non-trivial technical requirements. We demonstrate a method to overcome these challenges by developing a fully integrated diamond probe, and show some example applications.
By focusing on the second-order correlation as a function of emission polarization, we demonstrate additional information gained from using polarization combined correlation optics and pave the way for future protocols in sub-diffraction limited particle localization and characterization via quantum imaging.
A super-resolution optical microscopy method using Bayesian inference and flipped optical modes, developed to better resolve point source emitters below the resolution limit.
We discuss our recent progress in utilising cutting edge diamond-based quantum sensors to develop a portable, robust, and sensitive nuclear magnetic resonance (NMR) spectrometer for in-field trace chemical detection and analysis.
We realise a novel quantum sensing protocol for spectral analysis, utilising continuous Faraday measurement of an ultracold atomic ensemble's quantum state. Through quantum process tomography, signal parameters are retrieved from the characteristic transition driven as the sensor sweeps through resonance.
Atom interferometry currently provides state-of-the art sensitivity for measurements of gravity. However, shot-noise inherently limits the sensitivity and bandwidth.We propose and theoretically model a scheme capable of generating entanglement which is compatible with high-precision atomic gravimeters.
We present the use of non-degenerate coupled photonic cavities in order suppress the contribution of laser phase noise in optomechanical sensing Systems. These coupled Cavities demonstrate laser phase noise rejection whilst not significantly degrading the device’s response.
We measure strain at the thermodynamic limit in custom passive optical fibre resonators to verify theoretical predictions that govern fundamental interactions between entropy fluctuations and a fibre sensor.
It has been demonstrated that the behaviour of superconducting quantum interference devices can be precisely tuned using electrostatic gates. We discuss the recent experimental results and summarise our current theoretical understanding of this effect.
Detectors designed to investigate fundamental physics such as quantum gravity and gravitational waves have been proposed utilising twin interferometers. We aim to demonstrate the improvement of a twin interferometer experiment via injecting Einstein-Podolsky-Rosen squeezed states.
