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Discovery Projects - Grant ID: DP140101638

Title
Discovery Projects - Grant ID: DP140101638
Funding
ARC | Discovery Projects
Contract (GA) number
DP140101638
Start Date
2014/01/01
End Date
2016/12/31
Open Access mandate
no
Organizations
-
More information
http://purl.org/au-research/grants/arc/DP140101638

 

  • Non-classical state generation in macroscopic systems via hybrid discrete-continuous quantum measurements

    Milburn, T. J.; Kim, M. S.; Vanner, M. R. (2016)
    Projects: ARC | Discovery Projects - Grant ID: DP140101638 (DP140101638)
    Non-classical state generation is an important component throughout experimental quantum science for quantum information applications and probing the fundamentals of physics. Here, we investigate permutations of quantum non-demolition quadrature measurements and single quanta addition/subtraction to prepare quantum superposition states in bosonic systems. The performance of each permutation is quantified and compared using several different non-classicality criteria including Wigner negativit...

    Entanglement and nonclassicality: A mutual impression

    Gholipour, H.; Shahandeh, F. (2016)
    Projects: ARC | Discovery Projects - Grant ID: DP140101638 (DP140101638)
    We find a sufficient condition to imprint the single-mode bosonic phase-space nonclassicality onto a bipartite state as modal entanglement and vice versa using an arbitrary beam splitter. Surprisingly, the entanglement produced or detected in this way depends only on the nonclassicality of the marginal input or output states, regardless of their purity and separability. In this way, our result provides a sufficient condition for generating entangled states of arbitrary high temperature and ar...

    Nonlinear optomechanical measurement of mechanical motion

    Brawley, G.A.; Vanner, M R; Larsen, Peter Emil; Schmid, Silvan; Boisen, Anja; Bowen, W.P. (2016)
    Projects: ARC | Discovery Projects - Grant ID: DP140101638 (DP140101638)
    Precision measurement of non-linear observables is an important goal in all facets of quantum optics. This allows measurement-based non-classical state preparation, which has been applied to great success in various physical systems, and provides a route for quantum information processing with otherwise linear interactions. In cavity optomechanics much progress has been made using linear interactions and measurement, but observation of non-linear mechanical degrees-of-freedom remains outstand...

    Generation of Mechanical Interference Fringes by Multi-Photon Quantum Measurement

    Ringbauer, M.; Weinhold, T. J.; White, A. G.; Vanner, M. R. (2016)
    Projects: ARC | Discovery Projects - Grant ID: DP140101638 (DP140101638)
    The exploration of wave phenomena and quantum properties of massive systems offers an intriguing pathway to study the foundations of physics and to develop a suite of quantum-enhanced technologies. Here we present an optomechanical scheme to prepare non-Gaussian quantum states of motion of a mechanical resonator using photonic quantum measurements. Our method is capable of generating non-classical mechanical states without the need for strong single-photon coupling, and is resilient against o...

    An opto-magneto-mechanical quantum interface between distant superconducting qubits

    Xia, Keyu; Vanner, Michael R.; Twamley, Jason (2014)
    Projects: ARC | Discovery Projects - Grant ID: DP140101638 (DP140101638)
    A quantum internet, where widely separated quantum devices are coherently connected, is a fundamental vision for local and global quantum information networks and processing. Superconducting quantum devices can now perform sophisticated quantum engineering locally on chip and a detailed method to achieve coherent optical quantum interconnection between distant superconducting devices is a vital, but highly challenging, goal. We describe a concrete opto-magneto-mechanical system that can inter...

    Arbitrary Multi-Qubit Generation

    Shahandeh, Farid; Lund, Austin P.; Ralph, Timothy C.; Vanner, Michael R. (2016)
    Projects: ARC | Discovery Projects - Grant ID: DP140101638 (DP140101638)
    We propose and analyse a scheme for single-rail-encoded arbitrary multi-qubit quantum-state generation to provide a versatile tool for quantum optics and quantum information applications. Our scheme can be realised, for small numbers of qubits, with current technologies using single photon inputs, passive linear optics, and heralding measurements. The particular examples of two- and three-qubit cluster states are studied in detail. We show that such states can be prepared with a high probabil...

    Towards Optomechanical Quantum State Reconstruction of Mechanical Motion

    Utilizing the tools of quantum optics to prepare and manipulate quantum states of motion of a mechanical resonator is currently one of the most promising routes to explore non-classicality at a macroscopic scale. An important quantum optomechanical tool yet to be experimentally demonstrated is the ability to perform complete quantum state reconstruction. Here, after providing a brief introduction to quantum states in phase space, we review and contrast the current proposals for state reconstr...

    A Quantum Optomechanical Interface Beyond the Resolved Sideband Limit

    Bennett, James S.; Khosla, Kiran; Madsen, Lars S.; Vanner, Michael R.; Rubinsztein-Dunlop, Halina; Bowen, Warwick P. (2015)
    Projects: ARC | Future Fellowships - Grant ID: FT140100650 (FT140100650), ARC | Discovery Projects - Grant ID: DP140101638 (DP140101638)
    Mechanical oscillators which respond to radiation pressure are a promising means of transferring quantum information between light and matter. Optical--mechanical state swaps are a key operation in this setting. Existing proposals for optomechanical state swap interfaces are only effective in the resolved sideband limit. Here, we show that it is possible to fully and deterministically exchange mechanical and optical states outside of this limit, in the common case that the cavity linewidth is...
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