ORCID Profile
0000-0002-6019-966X
Current Organisation
Macquarie University
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Quantum Information, Computation and Communication | Quantum Physics | Quantum Optics | Analysis of Algorithms and Complexity | Atomic, Molecular, Nuclear, Particle and Plasma Physics | Communications Technologies | Mathematical Aspects of Classical Mechanics, Quantum Mechanics and Quantum Information Theory | Mathematical Aspects of Quantum and Conformal Field Theory, Quantum Gravity and String Theory | Condensed Matter Physics | Theoretical Physics | Field Theory and String Theory | Electronic and Magnetic Properties of Condensed Matter; Superconductivity | Condensed Matter Modelling and Density Functional Theory | Quantum Physics not elsewhere classified | Microwave and Millimetrewave Theory and Technology | Atomic And Molecular Physics | Particle Physics
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in the Physical Sciences | Expanding Knowledge in Engineering | Expanding Knowledge in the Mathematical Sciences | Expanding Knowledge in Technology | Emerging Defence Technologies | Expanding Knowledge in the Information and Computing Sciences | Physical sciences |
Related Links
Publications
Anyonic interferometry and protected memories in atomic spin lattices
Publisher: Springer Science and Business Media LLC
Date: 20-04-2008
DOI: 10.1038/NPHYS943
Macroscopic superpositions and gravimetry with quantum magnetomechanics
Publisher: Springer Science and Business Media LLC
Date: 21-11-2016
DOI: 10.1038/SREP37495
Abstract: Precision measurements of gravity can provide tests of fundamental physics and are of broad practical interest for metrology. We propose a scheme for absolute gravimetry using a quantum magnetomechanical system consisting of a magnetically trapped superconducting resonator whose motion is controlled and measured by a nearby RF-SQUID or flux qubit. By driving the mechanical massive resonator to be in a macroscopic superposition of two different heights our we predict that our interferometry protocol could, subject to systematic errors, achieve a gravimetric sensitivity of Δ g / g ~ 2.2 × 10 −10 Hz −1/2 , with a spatial resolution of a few nanometres. This sensitivity and spatial resolution exceeds the precision of current state of the art atom-interferometric and corner-cube gravimeters by more than an order of magnitude, and unlike classical superconducting interferometers produces an absolute rather than relative measurement of gravity. In addition, our scheme takes measurements at ~10 kHz, a region where the ambient vibrational noise spectrum is heavily suppressed compared the ~10 Hz region relevant for current cold atom gravimeters.
A holographic duality from lifted tensor networks
Publisher: Springer Science and Business Media LLC
Date: 24-04-2020
DOI: 10.1038/S41534-020-0255-7
Abstract: Tensor networks provide an efficient classical representation of certain strongly correlated quantum many-body systems. We present a general lifting method to ascribe quantum states to the network structure itself that reveals important new physical features. To illustrate, we focus on the multiscale entanglement renormalization ansatz (MERA) tensor network for 1D critical ground states on a lattice. The MERA representation of the said state can be lifted to a 2D quantum dual in a way that is suggestive of a lattice version of the holographic correspondence from string theory. The bulk 2D state has an efficient quantum circuit construction and exhibits several features of holography, including the appearance of horizon-like holographic screens, short-ranged correlations described via a strange correlator and bulk gauging of global on-site symmetries at the boundary. Notably, the lifting provides a way to calculate a quantum-corrected Ryu–Takayanagi formula, and map bulk operators to boundary operators and vice versa.
Focus on Quantum Memory
Publisher: IOP Publishing
Date: 06-05-2015
Designing spin-1 lattice models using polar molecules
Publisher: IOP Publishing
Date: 18-05-2007
Time reversal and n-qubit canonical decompositions
Publisher: AIP Publishing
Date: 17-05-2005
DOI: 10.1063/1.1900293
Abstract: On pure states of n quantum bits, the concurrence entanglement monotone returns the norm of the inner product of a pure state with its spin-flip. The monotone vanishes for n odd, but for n even there is an explicit formula for its value on mixed states, i.e., a closed-form expression computes the minimum over all ensemble decompositions of a given density. For n even a matrix decomposition ν=k1ak2 of the unitary group is explicitly computable and allows for study of the monotone’s dynamics. The side factors k1 and k2 of this concurrence canonical decomposition (CCD) are concurrence symmetries, so the dynamics reduce to consideration of the a factor. This unitary a phases a basis of entangled states, and the concurrence dynamics of u are determined by these relative phases. In this work, we provide an explicit numerical algorithm computing ν=k1ak2 for n odd. Further, in the odd case we lift the monotone to a two-argument function. The concurrence capacity of ν according to the double argument lift may be nontrivial for n odd and reduces to the usual concurrence capacity in the literature for n even. The generalization may also be studied using the CCD, leading again to maximal capacity for most unitaries. The capacity of ν⊗I2 is at least that of ν, so odd-qubit capacities have implications for even-qubit entanglement. The generalizations require considering the spin-flip as a time reversal symmetry operator in Wigner’s axiomatization, and the original Lie algebra homomorphism defining the CCD may be restated entirely in terms of this time reversal. The polar decomposition related to the CCD then writes any unitary evolution as the product of a time-symmetric and time-antisymmetric evolution with respect to the spin-flip. En route we observe a Kramers’ nondegeneracy: the existence of a nondegenerate eigenstate of any time reversal symmetric n-qubit Hamiltonian demands (i) n even and (ii) maximal concurrence of said eigenstate. We provide ex les of how to apply this work to study the kinematics and dynamics of entanglement in spin chain Hamiltonians.
Calderbank-Shor-Steane holographic quantum error-correcting codes
Publisher: American Physical Society (APS)
Date: 11-2018
Room-temperature spontaneous superradiance from single diamond nanocrystals
Publisher: Springer Science and Business Media LLC
Date: 31-10-2017
DOI: 10.1038/S41467-017-01397-4
Abstract: Superradiance (SR) is a cooperative phenomenon which occurs when an ensemble of quantum emitters couples collectively to a mode of the electromagnetic field as a single, massive dipole that radiates photons at an enhanced rate. Previous studies on solid-state systems either reported SR from sizeable crystals with at least one spatial dimension much larger than the wavelength of the light and/or only close to liquid-helium temperatures. Here, we report the observation of room-temperature superradiance from single, highly luminescent diamond nanocrystals with spatial dimensions much smaller than the wavelength of light, and each containing a large number (~ 10 3 ) of embedded nitrogen-vacancy (NV) centres. The results pave the way towards a systematic study of SR in a well-controlled, solid-state quantum system at room temperature.
Quantum computational renormalization in the haldane phase
Publisher: American Physical Society (APS)
Date: 10-09-2010
Quantum walks of SU(2)k anyons on a ladder
Publisher: American Scientific Publishers
Date: 07-2013
Holonomic quantum computing in symmetry-protected ground states of spin chains
Publisher: IOP Publishing
Date: 14-02-2013
Entanglement dynamics in one-dimensional quantum cellular automata
Publisher: American Physical Society (APS)
Date: 13-10-2003
Loops and Strings in a Superconducting Lattice Gauge Simulator
Publisher: American Physical Society (APS)
Date: 07-12-2016
Quantum magnetomechanics
Publisher: American Physical Society (APS)
Date: 05-10-2012
Entangling dipole-dipole interactions for quantum logic with neutral atoms
Publisher: American Physical Society (APS)
Date: 16-05-2000
Quantum logic gates with neutral atoms in an optical lattice
Publisher: Opt. Soc. America
Date: 1998
General depolarized pure states
Publisher: Elsevier BV
Date: 03-2008
Deterministic generation of an on-demand Fock state
Publisher: The Optical Society
Date: 16-11-2012
DOI: 10.1364/OE.20.027198
Bulk fault-tolerant quantum information processing with boundary addressability
Publisher: IOP Publishing
Date: 11-01-2011
Entangling dipole-dipole interactions in optical lattices
Publisher: Opt. Soc. America
Date: 2001
Quantum Computing with Neutral Atoms in an Optical Lattice
Publisher: Wiley
Date: 09-2000
DOI: 10.1002/1521-3978(200009)48:9/11<925::AID-PROP925>3.0.CO;2-A
Creation, manipulation, and detection of abelian and non-abelian anyons in optical lattices
Publisher: American Physical Society (APS)
Date: 22-12-2008
Parallelism for quantum computation with qudits
Publisher: American Physical Society (APS)
Date: 28-09-2006
Detecting topological entanglement entropy in a lattice of quantum harmonic oscillators
Publisher: IOP Publishing
Date: 26-08-2014
Characterizing the entangling capacity of n-qubit computations
Publisher: SPIE
Date: 24-08-2004
DOI: 10.1117/12.541876
Non-locality of non-Abelian anyons
Publisher: IOP Publishing
Date: 12-10-2009
Modified coherence of quantum spins in a damped pure-dephasing model
Publisher: American Physical Society (APS)
Date: 21-03-2022
Anonymous broadcasting of classical information with a continuous-variable topological quantum code
Publisher: American Physical Society (APS)
Date: 30-03-2018
Simulation of braiding anyons using matrix product states
Publisher: American Physical Society (APS)
Date: 20-04-2016
Measurement-based quantum computation in a two-dimensional phase of matter
Publisher: IOP Publishing
Date: 13-01-2012
Deterministic generation of an on-demand photon fock state from a solid-state system
Publisher: OSA
Date: 2013
Ensemble-Induced Strong Light-Matter Coupling of a Single Quantum Emitter
Publisher: American Physical Society (APS)
Date: 20-03-2020
Measurement-based quantum computer in the gapped ground state of a two-body hamiltonian
Publisher: American Physical Society (APS)
Date: 02-07-2008
Geometric Pathway to Scalable Quantum Sensing
Publisher: American Physical Society (APS)
Date: 06-11-2020
Imaging Stars with Quantum Error Correction
Publisher: American Physical Society (APS)
Date: 16-11-2022
Phase transitions on a ladder of braided non-Abelian anyons
Publisher: American Physical Society (APS)
Date: 30-07-2018
Robust symmetry-protected metrology with the Haldane phase
Publisher: IOP Publishing
Date: 29-12-2018
Cooperatively-enhanced atomic dipole forces in optically trapped nanodiamonds containing NV centres, in liquid
Publisher: SPIE
Date: 09-12-2016
DOI: 10.1117/12.2242963
Qudit surface codes and gauge theory with finite cyclic groups
Publisher: IOP Publishing
Date: 14-03-2007
Decoding holographic codes with an integer optimization decoder
Publisher: American Physical Society (APS)
Date: 21-12-2020
Unitary and Nonunitary Quantum Cellular Automata with Rydberg Arrays
Publisher: American Physical Society (APS)
Date: 21-02-2020
Quantum attacks on Bitcoin, and how to protect against them
Publisher: University Library System, University of Pittsburgh
Date: 17-10-2018
Abstract: The key cryptographic protocols used to secure the internet and financial transactions of today are all susceptible to attack by the development of a sufficiently large quantum computer. One particular area at risk is cryptocurrencies, a market currently worth over 100 billion USD. We investigate the risk posed to Bitcoin, and other cryptocurrencies, by attacks using quantum computers. We find that the proof-of-work used by Bitcoin is relatively resistant to substantial speedup by quantum computers in the next 10 years, mainly because specialized ASIC miners are extremely fast compared to the estimated clock speed of near-term quantum computers. On the other hand, the elliptic curve signature scheme used by Bitcoin is much more at risk, and could be completely broken by a quantum computer as early as 2027, by the most optimistic estimates. We analyze an alternative proof-of-work called Momentum, based on finding collisions in a hash function, that is even more resistant to speedup by a quantum computer. We also review the available post-quantum signature schemes to see which one would best meet the security and efficiency requirements of blockchain applications.
Cooperatively enhanced dipole forces from artificial atoms in trapped nanodiamonds
Publisher: Springer Science and Business Media LLC
Date: 14-11-2017
DOI: 10.1038/NPHYS3940
Matrix product states for anyonic systems and efficient simulation of dynamics
Publisher: American Physical Society (APS)
Date: 13-02-2014
Canonical decompositions of n-qubit quantum computations and concurrence
Publisher: AIP Publishing
Date: 17-05-2004
DOI: 10.1063/1.1723701
Abstract: The two-qubit canonical decomposition SU(4)=[SU(2)⊗SU(2)]Δ[SU(2)⊗SU(2)] writes any two-qubit unitary operator as a composition of a local unitary, a relative phasing of Bell states, and a second local unitary. Using Lie theory, we generalize this to an n-qubit decomposition, the concurrence canonical decomposition (CCD) SU(2n)=KAK. The group K fixes a bilinear form related to the concurrence, and in particular any unitary in K preserves the tangle |〈φ|¯(−iσ1y)⋯(−iσny)|φ〉|2 for n even. Thus, the CCD shows that any n-qubit unitary is a composition of a unitary operator preserving this n-tangle, a unitary operator in A which applies relative phases to a set of GHZ states, and a second unitary operator which preserves the tangle. As an application, we study the extent to which a large, random unitary may change concurrence. The result states that for a randomly chosen a∈A⊂SU(22p), the probability that a carries a state of tangle 0 to a state of maximum tangle approaches 1 as the even number of qubits approaches infinity. Any v=k1ak2 for such an a∈A has the same property. Finally, although |〈φ|¯(−iσ1y)⋯(−iσny)|φ〉|2 vanishes identically when the number of qubits is odd, we show that a more complicated CCD still exists in which K is a symplectic group.
A toolbox for lattice-spin models with polar molecules
Publisher: Springer Science and Business Media LLC
Date: 30-04-2006
DOI: 10.1038/NPHYS287
Multiscale quantum simulation of quantum field theory using wavelets
Publisher: American Physical Society (APS)
Date: 15-09-2015
Asymptotically optimal quantum circuits for d-level systems
Publisher: American Physical Society (APS)
Date: 14-06-2005
Entanglement renormalization and symmetry fractionalization
Publisher: American Physical Society (APS)
Date: 22-05-2019
Anyonic quantum walks
Publisher: Elsevier BV
Date: 03-2010
Quantum walks with memory provided by recycled coins and a memory of the coin-flip history
Publisher: American Physical Society (APS)
Date: 02-05-2013
Why should anyone care about computing with anyons?
Publisher: The Royal Society
Date: 16-10-2008
Abstract: In this article we present a pedagogical introduction of the main ideas and recent advances in the area of topological quantum computation. We give an overview of the concept of anyons and their exotic statistics, present various models that exhibit topological behaviour and establish their relation to quantum computation. Possible directions for the physical realization of topological systems and the detection of anyonic behaviour are elaborated.
Directed percolation in nonunitary quantum cellular automata
Publisher: American Physical Society (APS)
Date: 10-12-2021
Stability of global entanglement in thermal states of spin chains
Publisher: American Physical Society (APS)
Date: 04-11-2004
Cooperative effects between color centers in diamond
Publisher: SPIE
Date: 25-08-2017
DOI: 10.1117/12.2276050
Relational time in anyonic systems
Publisher: American Physical Society (APS)
Date: 12-03-2018
Criteria for exact qudit universality
Publisher: American Physical Society (APS)
Date: 16-05-2005
Globally controlled universal quantum computation with arbitrary subsystem dimension
Publisher: American Physical Society (APS)
Date: 12-11-2009
Constructing general unitary maps from state preparations
Publisher: American Physical Society (APS)
Date: 28-08-2009
Non-Abelian anyonic interferometry with a multi-photon spin lattice simulator
Publisher: IOP Publishing
Date: 07-05-2010
Holographic spin networks from tensor network states
Publisher: American Physical Society (APS)
Date: 26-01-2018
Nearly Optimal Quantum Algorithm for Generating the Ground State of a Free Quantum Field Theory
Publisher: American Physical Society (APS)
Date: 28-06-2022
Fault tolerance with noisy and slow measurements and preparation
Publisher: American Physical Society (APS)
Date: 30-08-2010
Simulations of quantum double models
Publisher: IOP Publishing
Date: 22-05-2009
Entanglement in quantum field theory via wavelet representations
Publisher: American Physical Society (APS)
Date: 26-08-2022
Related Organisations
Related Funding Activities
Discovery Projects - Grant ID: DP1094758
Start Date: 06-2010
End Date: 06-2013
Amount: $297,373.00
Funder: Australian Research Council
View Funded ActivityDiscovery Projects - Grant ID: DP160102426
Start Date: 2016
End Date: 09-2019
Amount: $435,700.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE180100042
Start Date: 2018
End Date: 12-2018
Amount: $621,834.00
Funder: Australian Research Council
View Funded ActivityDiscovery Projects - Grant ID: DP200102152
Start Date: 03-2020
End Date: 03-2025
Amount: $476,000.00
Funder: Australian Research Council
View Funded ActivityARC Centres Of Excellence - Grant ID: CE170100009
Start Date: 2018
End Date: 06-2025
Amount: $31,900,000.00
Funder: Australian Research Council
View Funded ActivityARC Centres Of Excellence - Grant ID: CE1101013
Start Date: 06-2011
End Date: 12-2017
Amount: $24,500,000.00
Funder: Australian Research Council
View Funded Activity