Events

Speaker: Jean-Philippe Tetienne, University of Melbourne Research Overview: Imaging ultrathin van der Waals magnets with a quantum diamond microscope The recent isolation of 2D van der Waals magnetic materials has uncovered rich physics that often differs from the magnetic behavior of their bulk counterparts. However, the microscopic details of fundamental processes such as the initial magnetization or domain reversal, which govern the magnetic hysteresis, remain largely unknown in the ultrathin limit. Here a widefield nitrogen‐vacancy (NV) microscope is employed to…

Speaker: Ludwik Kranz, UNSW Sydney Research Overview: Exploiting a Single‐Crystal Environment to Minimize the Charge Noise on Qubits in Silicon

In this seminar we will hear from two of our PhD students - Ruvi Lecamwasam and Hao Jeng - from ANU presenting their latest research. Research Overview: How your choice of measurement basis bounds estimator error - answers using entropy and circular statistics Speaker: Ruvi Lecamwasam, ANU Research overview: Teleporting coherent states of photons with reduced decoherence Speaker: Hao Jeng, ANU Abstract: Quantum teleportation of a coherent state causes it to evolve from a superposition of Fock states into a statistical…

Building Multiple Access Channels with a Single Particle SPEAKER: Professor Eric Chitambar AFFILIATION: University of Illinois at Urbana-Champaign, Illinois, USA HOSTED BY: A/Prof Min-Hsiu Hsieh, Centre for Quantum Software and Information ABSTRACT:  A multiple access channel describes a situation in which multiple senders are trying to forward messages to a single receiver using some communication medium. In this talk we consider scenarios in which this medium consists of just a single classical or quantum particle. In the quantum case, the particle can be prepared in a…

SPEAKER:Dr Viv Kendon, Durham University, Durham, UK TITLE: Strategies for quantum optimisation algorithms with short run-times. SPEAKER: Dr Viv Kendon AFFILIATION:  Durham University, Durham, UK HOSTED BY: A/Prof Nathan Langford, UTS Centre for Quantum Software and Information ABSTRACT: Continuous-time quantum computing includes computation by continuous-time quantum walk (QW), adiabatic quantum computing (AQC), quantum annealing (QA), and special purpose quantum simulators. All evolve the initial quantum state to the final quantum state using a continuous-time process.  This is a natural way to compute with quantum systems.…

Speakers: Prof. Howard Wiseman & Kok-Wei Bong, from Griffith University Research overview: A strong no-go theorem on the Wigner’s friend paradox Does quantum theory apply at all scales, including that of observers? New light on this fundamental question has recently been shed through a resurgence of interest in the long-standing Wigner’s friend paradox. This is a thought experiment addressing the quantum measurement problem—the difficulty of reconciling the (unitary, deterministic) evolution of isolated systems and the (non-unitary, probabilistic) state update after…

TITLE: Coherent electrical control of a high spin nucleus in silicon SPEAKER: Dr Vincent Mourik AFFILIATION: Fundamental Quantum Technologies Laboratory & Centre for Quantum Computation and Communication Technology, UNSW, Sydney HOSTED BY: Dr JP Dehollain, UTS Centre for Quantum Software and Information ABSTRACT: Nuclear electric resonance (NER) enables transitions of a high spin nucleus by modulating its electrical quadrupole interaction with an electric field. In this talk I will show how we found this effect in our single 123-Sb donor…

SPEAKER: Dominik Hangleiter, Freie Universität Berlin TITLE: Quantum versus classical learnability of discrete distributions ABSTRACT:  Quantum machine learning has been hailed as one of the promising near-term applications of small quantum computers and much research is focused on devising quantum heuristics that might yield an advantage over classical learning algorithms. In this talk, we will take a step back and ask: Can we hope for a provable quantum advantage in machine learning? To this end we focus on the following…