A5043084366- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Spectroscopy and Quantum Chemical Studies
- Elasticity and Wave Propagation
- Experimental and Theoretical Physics Studies
- Quantum optics and atomic interactions
- Advanced Frequency and Time Standards
- Mathematical Control Systems and Analysis
- Photonic and Optical Devices
- Mass Spectrometry Techniques and Applications
- Quantum Mechanics and Applications
- Theoretical and Computational Physics
- Scientific Research and Discoveries
- Ion-surface interactions and analysis
- Advanced Optical Sensing Technologies
- Quantum chaos and dynamical systems
- Mechanical and Optical Resonators
- Quantum and electron transport phenomena
- Laser-Matter Interactions and Applications
- Atomic and Subatomic Physics Research
- Cold Atom Physics and Bose-Einstein Condensates
- Various Chemistry Research Topics
- Atomic and Molecular Physics
- Cybersecurity and Information Systems
- Benford’s Law and Fraud Detection
The University of Sydney
2022-2024
ARC Centre of Excellence for Engineered Quantum Systems
2022-2024
Quantum (Australia)
2023
University of Washington
2021
Encoding logical qubits in bosonic modes provides a potentially hardware-efficient implementation of fault-tolerant quantum information processing. Here, we demonstrate high-fidelity and deterministic preparation highly nonclassical states the mechanical motion trapped ion. Our approach implements error-suppressing pulses through optimized dynamical modulation laser-driven spin-motion interactions to generate target state single step. We fidelities for Gottesman-Kitaev-Preskill as high...
Analog quantum computers can calculate molecular vibronic spectra using time-domain simulation, with exponentially greater scalability than previous, frequency-domain approaches. An accurate, trapped-ion simulation of SO 2 validates the approach.
In this paper, direct observation of micromotion for multiple ions in a laser-cooled trapped ion crystal is discussed along with measurement technique amplitude. Micromotion directly observed using time-resolving, single-photon-sensitive camera that provides both fluorescence and position data each on the nanosecond time scale. amplitude phase are measured, allowing method to be sensitive tilts shifts chain from null radio-frequency quadrupole potential linear trap. Spatial resolution makes...
Spectroscopy is one of the most accurate probes molecular world. However, predicting spectra accurately computationally difficult because presence entanglement between electronic and nuclear degrees freedom. Although quantum computers promise to reduce this computational cost, existing approaches rely on combining signals from individual eigenstates, an approach whose cost grows exponentially with molecule size. Here, we introduce a method for scalable analog simulation spectroscopy: by...
Conical intersections are ubiquitous in chemistry and physics, often governing processes such as light harvesting, vision, photocatalysis, chemical reactivity. They act funnels between electronic states of molecules, allowing rapid efficient relaxation during dynamics. In addition, when a reaction path encircles conical intersection, the molecular wavefunction experiences geometric phase, which can affect outcome through quantum-mechanical interference. Past experiments have measured...
Encoding logical qubits in bosonic modes provides a potentially hardware-efficient implementation of fault-tolerant quantum information processing. Here, we demonstrate high-fidelity and deterministic preparation highly non-classical states the mechanical motion trapped ion. Our approach implements error-suppressing pulses through optimized dynamical modulation laser-driven spin-motion interactions to generate target state single step. We fidelities for Gottesman-Kitaev-Preskill (GKP) as...
Simulating chemistry is likely to be among the earliest applications of quantum computing. However, existing digital algorithms for chemical simulation require many logical qubits and gates, placing practical beyond technology. Here, we use an analog approach carry out first simulations reactions. In particular, simulate photoinduced non-adiabatic dynamics, one most challenging classes problems in because they involve strong coupling entanglement between electronic nuclear motions. We a...
The realisation of a universal quantum computer at scale promises to deliver paradigm shift in information processing, providing the capability solve problems that are intractable with conventional computers. A key limiting factor realising fault-tolerant processing (QIP) is large ratio physical-to-logical qubits outstrip device sizes available near future. An alternative approach proposed by Gottesman, Kitaev, and Preskill (GKP) encodes single logical qubit into harmonic oscillator,...
Precision metrology underpins scientific and technological advancements. Quantum offers a pathway to surpass classical sensing limits by leveraging quantum states measurement strategies. However, measuring multiple incompatible observables suffers from backaction, where of one observable pollutes subsequent the other. This is manifestation Heisenberg's uncertainty principle for two non-commuting observables, such as position momentum. Here, we demonstrate measurements small changes in...
Interactions of molecules with their environment influence the course and outcome almost all chemical reactions. However, classical computers struggle to accurately simulate complicated molecule-environment interactions because steep growth computational resources both molecule size complexity. Therefore, many quantum-chemical simulations are restricted isolated molecules, whose dynamics can dramatically differ from what happens in an environment. Here, we show that analog quantum simulators...
We review our recent results in which we use trapped ions to observe geometric phase interference around a conical intersection [arXiv:2211.07320, 2022]. This is key demonstration towards using mixed-qubit boson simulators solve difficult chemical dynamics problems.
SummaryWe report an 8.7-second qubit coherence time in a ytterbium ion ( <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">171</sup> Yb xmlns:xlink="http://www.w3.org/1999/xlink">+</sup> ) using microwave synthesis system derived from ultra-low phase noise cryogenic sapphire oscillator (CSO). Our measurement provides evidence that the of local serves as master clock plays significant role operation fidelities trapped-ion quantum information processor.
Here we demonstrate the use of Tpx3cam, a novel single-photon sensitive camera, in trapped ion experiments. We perform detection multiple-qubit state as well observation micromotion linear chain.