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Finding the lost particle: Majorana fermions in ultracold atoms. Majorana fermions – particles that are their own antiparticles – play a key role in future quantum technologies such as fault-tolerant quantum computers. Being considered only as a mathematical possibility over the past 75 years, they might be surprisingly materialised owing to recent rapid experimental advances. In collaboration with the world-leading cold-atom laboratories in Australia, China and the USA, this project aims to pav ....Finding the lost particle: Majorana fermions in ultracold atoms. Majorana fermions – particles that are their own antiparticles – play a key role in future quantum technologies such as fault-tolerant quantum computers. Being considered only as a mathematical possibility over the past 75 years, they might be surprisingly materialised owing to recent rapid experimental advances. In collaboration with the world-leading cold-atom laboratories in Australia, China and the USA, this project aims to pave a new direction to create and manipulate Majorana fermions towards realistic atomtronics devices, by using the highly controllable setting of ultracold atomic Fermi gases. This research complements the search of Majorana fermions in solid-state devices.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE170100055
Funder
Australian Research Council
Funding Amount
$360,000.00
Summary
Quantum wires of Fermi atoms. This project aims to understand one-dimensional materials by engineering quantum wires of interacting fermions with ultracold atoms. Particles confined to move in one dimension behave differently than in three-dimensional matter, revealing quantum phases and exotic forms of superfluidity not seen in higher dimensions. Ultracold atoms allow the precise control of interactions and a perfectly isolated and defect free environment to study such phenomena not easily achi ....Quantum wires of Fermi atoms. This project aims to understand one-dimensional materials by engineering quantum wires of interacting fermions with ultracold atoms. Particles confined to move in one dimension behave differently than in three-dimensional matter, revealing quantum phases and exotic forms of superfluidity not seen in higher dimensions. Ultracold atoms allow the precise control of interactions and a perfectly isolated and defect free environment to study such phenomena not easily achieved in solid-state systems. The goal of this project is to provide quantitative insights into the thermodynamic and superfluid properties of one-dimensional quantum materials with potential significance for new innovations and applications in emerging quantum technologies.Read moreRead less
Polarons in flatland. This project aims to generate new theories of excitons (the solid-state analogue of hydrogen atoms) in charge-doped atomically thin semiconductors. Such theories are urgently needed to describe the response to external probes, such as electric fields, of a range of novel materials that have emerged in recent years. The novelty is to treat the behaviour of semiconductors as a quantum impurity problem, where the excitons become modified by the surrounding electrons to form ne ....Polarons in flatland. This project aims to generate new theories of excitons (the solid-state analogue of hydrogen atoms) in charge-doped atomically thin semiconductors. Such theories are urgently needed to describe the response to external probes, such as electric fields, of a range of novel materials that have emerged in recent years. The novelty is to treat the behaviour of semiconductors as a quantum impurity problem, where the excitons become modified by the surrounding electrons to form new types of particles. A greater understanding of the impurity problem in 2D materials would ultimately facilitate their use in emerging technologies that combine electronics with photonics, for use in ultra-low-power devices such as photodectectors, LEDs, and lasers.Read moreRead less
Spin-orbit coupled quantum gases: understanding new generation materials with topological order. Topological insulators and superconductors are new functional materials discovered very recently in solid-state systems. They have remarkable, topologically protected states on their surfaces that render the electrons travelling insensitive to the scattering by impurities or disorder. Their potential applications in our ordinary life are far-reaching, ranging from novel energy-saving devices to reali ....Spin-orbit coupled quantum gases: understanding new generation materials with topological order. Topological insulators and superconductors are new functional materials discovered very recently in solid-state systems. They have remarkable, topologically protected states on their surfaces that render the electrons travelling insensitive to the scattering by impurities or disorder. Their potential applications in our ordinary life are far-reaching, ranging from novel energy-saving devices to realistic quantum computers. This project will obtain greatly improved understanding of the novel topological states that underlie such new generation materials, by using the highly controllable settings of spin-orbit coupled quantum gases. It will advance Australia’s position at the forefront of ultracold atomic physics research.Read moreRead less
Observing Einstein-Podolsky-Rosen entanglement with ultracold atomic gases. As a fundamental test of quantum mechanics, the project will demonstrate for the first time the famous Einstein-Podolsky-Rosen paradox in the regime of a macroscopic number of entangled massive particles. As well as enabling the design of new gravitational sensors, the outcomes will give insights into the unification of quantum theory with gravity.
Quantum Phase Transitions In- and Out-of-Equilibrium in Optical Lattices. This project aims to contribute to understanding the physics of quantum many-body systems. A complete understanding of phase transitions in strongly interacting quantum many-body systems is a key step towards solving several open problems in modern physics (eg high temperature superconductors). However, they are extremely difficult to study theoretically or in traditional experiments, due to the underlying strong quantum c ....Quantum Phase Transitions In- and Out-of-Equilibrium in Optical Lattices. This project aims to contribute to understanding the physics of quantum many-body systems. A complete understanding of phase transitions in strongly interacting quantum many-body systems is a key step towards solving several open problems in modern physics (eg high temperature superconductors). However, they are extremely difficult to study theoretically or in traditional experiments, due to the underlying strong quantum correlations. This project plans to take an alternative approach using ultra-cold helium atoms in an optical lattice to form an analogue quantum simulator. This would provide access to a new experimental observable: many-body correlation functions, which should yield new insights. Understanding such systems more deeply may lead to the development of new quantum technologies based on this science.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE150101636
Funder
Australian Research Council
Funding Amount
$315,000.00
Summary
Emergent quantum phenomena in ultracold matter with artificial gauge fields. Gauge fields are central in our modern understanding of physics. They are at the origin of many sophisticated states of matter including quantum Hall materials, topological insulators and supersolids that have potential applications in future technologies. This project aims to explore these exotic quantum states emerging in ultracold atomic gases with artificially engineered gauge fields. Unlike the solid-state systems, ....Emergent quantum phenomena in ultracold matter with artificial gauge fields. Gauge fields are central in our modern understanding of physics. They are at the origin of many sophisticated states of matter including quantum Hall materials, topological insulators and supersolids that have potential applications in future technologies. This project aims to explore these exotic quantum states emerging in ultracold atomic gases with artificially engineered gauge fields. Unlike the solid-state systems, in which all details of the material structure are not controlled or even not known with certainty, the unprecedented controllability of the ultracold system provides a unique opportunity to gain key insights on the physics related to the gauge fields, and to advance the studies in both fundamental physics and applications.Read moreRead less
Spin vortex dynamics in a ferromagnetic superfluid. Magnetic spin vortices are stable whirlpool-like objects that can spontaneously form when magnetic materials are rapidly cooled. This project aims to understand and manipulate spin vortices in a magnetic quantum fluid, one of the cleanest and most controllable magnetic systems. The significance is that spin vortices are potentially fundamental elements of future electronic technologies for advanced storage and logic. The expected outcomes are ....Spin vortex dynamics in a ferromagnetic superfluid. Magnetic spin vortices are stable whirlpool-like objects that can spontaneously form when magnetic materials are rapidly cooled. This project aims to understand and manipulate spin vortices in a magnetic quantum fluid, one of the cleanest and most controllable magnetic systems. The significance is that spin vortices are potentially fundamental elements of future electronic technologies for advanced storage and logic. The expected outcomes are the ability to create spin vortices on demand, and the characterisation of their suitability for future applications. The benefit is an improved fundamental knowledge of spin vortices, and laying the groundwork for the use of magnetic structures in future spin-based electronics.Read moreRead less
Quantum nonlocality tests with ultracold atoms. As a fundamental test of quantum mechanics, we will measure for the first time "spooky action-at-a-distance" for macroscopically large groups of atoms. As well as establishing limits to the size of new quantum devices such as gravitational sensors, we will provide insights into the unification of quantum theory with gravity.
New generation periodic lattices for ultracold quantum gases. Periodic arrays of ultracold atoms trapped by magnetic microstructures will be used to mimic condensed matter systems with nontrivial geometries such as honeycomb lattices. These magnetic lattices will enable us to study exotic quantum states, such as those found in graphene, which has great potential for new-generation atomic-scale electronics.