Warwick Bowen is an Australian quantum physicist and nanotechnologist at The University of Queensland. He leads the Quantum Optics Laboratory, [1] is Director of the UQ Precision Sensing Initiative [2] and is one of three Theme Leaders of the Australian Centre for Engineered Quantum Systems. [3]
Bowen attended the University of Otago in New Zealand, where he received a Bachelor of Science degree with Honours in Physics in 1999. He went on to earn a PhD in Physics at the Australian National University in 2004, and was awarded the 2004 Bragg Gold Medal for Excellence in Physics from the Australian Institute of Physics, which recognizes the best PhD thesis in physics by a student from an Australian university. [4]
Bowen went on to become Moore Postdoctoral Fellow at the California Institute of Technology in 2004 and 2005.
In 2005, Bowen was recruited to a faculty position in the Department of Physics at the University of Otago. Then, in 2008, he commenced a faculty position at the School of Mathematics and Physics at the University of Queensland, where he became a full Professor in 2016.
He was awarded a five-year Australian Research Council (ARC) [5] Queen Elizabeth II Fellowship in 2009, and went on to become an ARC Future Fellow in 2015. [6]
Since 2013, while based at the University of Queensland, Bowen has been a Principal Investigator in the US Air Force Office of Scientific Research (AFOSR) in Biophysics Program. [7]
In 2017 Bowen established and became Director of the University of Queensland Precision Sensing Initiative. [2] In 2018, Bowen was also awarded an Adjunct Professorship at the Australian Institute for Bioengineering and Nanotechnology at the University of Queensland.
Bowen’s research focusses on the interface of nanotechnology and quantum science, including nanophotonics, nanomechanics, quantum optomechanics and photonic/quantum sensing. His work spans from addressing very fundamental questions about how quantum physics transitions into our everyday world at large scales, to the development of novel applications in navigation, biomedical diagnostics, quantum communications and computation. He has worked with industry partners including Boeing, NASA Glenn Laboratories and Lockheed Martin.
In particular, Bowen has focussed on quantum-enhanced sensing and communication technologies, including development of the first prototype quantum light source at gravitational wave frequencies, planned to be installed in the Laser Interferometry Gravitational Wave Observatory (LIGO) in 2018. [8] [9] Recently, his research group has pioneered the application of quantum optomechanical techniques in magnetometry, ultrasound sensing and microscopy of biological systems. [10] [11] [12] This includes the first demonstrations that quantum correlations could improve the sensitivity and resolution of light microscopes, [13] [14] experiments that also were the first to apply quantum corrections to improve biological measurements; and the first demonstration of absolute quantum advantage in sensing that employs quantum correlations, [15] showing that quantum correlations can provide image clarity beyond the usual photodamage limits of microscopy. These were longstanding challenges widely recognised in the field of quantum optics. [16] with the latter being a key milestone in the UK Quantum Technologies Roadmap. [17]
Prof Bowen is also developing nanophotonic techniques to control superfluid helium, an exotic quantum liquid and building block for future quantum technologies. Using these techniques, his research lab demonstrated direct laser cooling of a liquid [18] and the tracking of quantum vortices in two-dimensional superfluid helium, both for the first time, [19] and showed that very low threshold lasing of superfluid sound waves was possible. [20]
In 2020 Warwick Bowen founded the company Elemental Instruments with co-founder Dr Glen Harris. Elemental Instruments develops scientific instrumentation for quantum technologies, chemical and material analysis, medical imaging, and university/school laboratories and demonstrations. A key focus of the company is compact low-power solutions to generate strong, uniform and tuneable magnetic fields.
Warwick Bowen has received a range of awards and honours, including
In condensed matter physics, a Bose–Einstein condensate (BEC) is a state of matter that is typically formed when a gas of bosons at very low densities is cooled to temperatures very close to absolute zero. Under such conditions, a large fraction of bosons occupy the lowest quantum state, at which point microscopic quantum mechanical phenomena, particularly wavefunction interference, become apparent macroscopically. A BEC is formed by cooling a gas of extremely low density to ultra-low temperatures.
In condensed matter physics, a supersolid is a spatially ordered material with superfluid properties. In the case of helium-4, it has been conjectured since the 1960s that it might be possible to create a supersolid. Starting from 2017, a definitive proof for the existence of this state was provided by several experiments using atomic Bose–Einstein condensates. The general conditions required for supersolidity to emerge in a certain substance are a topic of ongoing research.
Electromagnetically induced transparency (EIT) is a coherent optical nonlinearity which renders a medium transparent within a narrow spectral range around an absorption line. Extreme dispersion is also created within this transparency "window" which leads to "slow light", described below. It is in essence a quantum interference effect that permits the propagation of light through an otherwise opaque atomic medium.
Jonathan P. Dowling was an Irish-American researcher and professor in theoretical physics, known for his work on quantum technology, particularly for exploiting quantum entanglement for applications to quantum metrology, quantum sensing, and quantum imaging.
Within quantum technology, a quantum sensor utilizes properties of quantum mechanics, such as quantum entanglement, quantum interference, and quantum state squeezing, which have optimized precision and beat current limits in sensor technology. The field of quantum sensing deals with the design and engineering of quantum sources and quantum measurements that are able to beat the performance of any classical strategy in a number of technological applications. This can be done with photonic systems or solid state systems.
Jeremy O'Brien is a physicist who researches in quantum optics, optical quantum metrology and quantum information science. He co-founded and serves as CEO of the quantum computing firm PsiQuantum. Formerly, he was Professorial Research Fellow in Physics and Electrical Engineering at the University of Bristol, and director of its Centre for Quantum Photonics.
Dirk (Dik) Bouwmeester is a Dutch experimental physicist specializing in quantum optics and quantum information. He currently holds faculty positions at the University of California at Santa Barbara and at Leiden University in the Netherlands.
Andrew G. White FAA is an Australian scientist and is currently Professor of Physics and a Vice-Chancellor's Senior Research Fellow at the University of Queensland. He is also Director of the University of Queensland Quantum technology Laboratory; Deputy-Director of the ARC Centre for Engineered Quantum systems, and a Program Manager in the ARC Centre for Quantum Computer and Communication Technology..
Whispering-gallery waves, or whispering-gallery modes, are a type of wave that can travel around a concave surface. Originally discovered for sound waves in the whispering gallery of St Paul's Cathedral, they can exist for light and for other waves, with important applications in nondestructive testing, lasing, cooling and sensing, as well as in astronomy.
Immanuel Bloch is a German experimental physicist. His research is focused on the investigation of quantum many-body systems using ultracold atomic and molecular quantum gases. Bloch is known for his work on atoms in artificial crystals of light, optical lattices, especially the first realization of a quantum phase transition from a weakly interacting superfluid to a strongly interacting Mott insulating state of matter.
Tilman Esslinger is a German experimental physicist. He is Professor at ETH Zurich, Switzerland, and works in the field of ultracold quantum gases and optical lattices.
Weyl fermions are massless chiral fermions embodying the mathematical concept of a Weyl spinor. Weyl spinors in turn play an important role in quantum field theory and the Standard Model, where they are a building block for fermions in quantum field theory. Weyl spinors are a solution to the Dirac equation derived by Hermann Weyl, called the Weyl equation. For example, one-half of a charged Dirac fermion of a definite chirality is a Weyl fermion.
Luigi Lugiato is an Italian physicist and professor emeritus at University of Insubria (Varese/Como). He is best known for his work in theoretical nonlinear and quantum optics, and especially for the Lugiato–Lefever equation (LLE,). He has authored more than 340 scientific articles, and the textbook Nonlinear Dynamical Systems. His work has been theoretical but has stimulated a large number of important experiments in the world. It is also characterized by the fact of combining the classical and quantum aspects of optical systems.
Integrated quantum photonics, uses photonic integrated circuits to control photonic quantum states for applications in quantum technologies. As such, integrated quantum photonics provides a promising approach to the miniaturisation and scaling up of optical quantum circuits. The major application of integrated quantum photonics is Quantum technology:, for example quantum computing, quantum communication, quantum simulation, quantum walks and quantum metrology.
Halina Rubinsztein-Dunlop is a professor of physics at the University of Queensland and an Officer of the Order of Australia. She has led pioneering research in atom optics, laser micro-manipulation using optical tweezers, laser enhanced ionisation spectroscopy, biophysics and quantum physics.
Matthew Davis is a New Zealand/Australian physicist, and is Head of Physics at the University of Queensland, Australia. He is known for his work on the dynamics of vortices and superfluidity in Bose–Einstein condensates, particularly at finite temperatures
Mary Jacquiline Romero is a quantum physicist in the Australian Research Council Centre of Excellence for Engineered Quantum Systems at the University of Queensland, Australia. Her research expertise and interests are in the field of quantum foundations and quantum information. In particular, Romero is an experimental quantum physicist studying the properties of single photons for the development of new quantum alphabets and the nature of quantum causality.
Oskar Painter is a Canadian born (1972) experimental physicist who works on nanoscale optics, nanomechanical devices, and superconducting qubits. He is the John G. Braun Professor of Applied Physics and Professor of Physics at Caltech. Since 2019, he is also Head of Quantum Hardware at Amazon Web Services (AWS).
Charles D. Brown II is an American physicist and postdoctoral researcher at the University of California, Berkeley, studying many-body physics of ultracold atoms in optical lattices. Brown is also a lead organiser of #BlackInPhysics week, a campaign to recognise and amplify the scientific contributions of Black physicists.
Quantum turbulence involves the chaotic dynamics of many interacting quantum vortices. In bulk superfluid, quantum turbulent states form a complex tangle of highly excited vortex lines. By introducing tight confinement along one direction the Kelvin wave excitations can be strongly suppressed, favouring vortex alignment with the axis of tight confinement. Vortex dynamics enters a regime of effective 2D motion, equivalent to point vortices moving on a plane. In general, 2D quantum turbulence (2DQT) can exhibit complex phenomenology involving coupled vortices and sound in compressible superfluids. The quantum vortex dynamics can exhibit signatures of turbulence including a Kolmogorov −5/3 power law, a quantum manifestation of the inertial transport of energy to large scales observed in classical fluids, known as an inverse energy cascade.
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