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November 2020

CQC2T Online Seminar: Deterministic Single Ion Implantation with 99.87% Confidence for Scalable Donor-Qubit Arrays in Silicon –  Alexander Jakob UM

November 24, 2020 @ 2:00 pm - 3:00 pm

Speaker: Alexander Jakob, University of Melbourne Host: TBC Date/ Time: Tuesday, 24 November 2020, 2pm AEDT (1pm QLD) Presentation: Deterministic Single Ion Implantation with 99.87% Confidence for Scalable Donor-Qubit Arrays in Silicon The attributes of group-V-donor spins implanted in an isotopically purified 28Si crystal make them attractive qubits for large-scale quantum computer devices. Important features include long nuclear and electron spin lifetimes of 31P, hyperfine clock transitions in 209Bi and electrically controllable 123Sb nuclear spins. However, architectures for scalable quantum devices require the ability to…

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CQC2T Online Seminar: Modular Bosonic Subsystem Codes – Giacomo Pantaleoni, RMIT

November 10, 2020 @ 2:00 pm - 3:00 pm
Online

Speaker: Giacomo Pantaleoni, RMIT University Host: TBC Research Overview: Modular Bosonic Subsystem Codes We introduce a framework to decompose a bosonic mode into two virtual subsystems—a logical qubit and a gauge mode. This framework allows the entire toolkit of qubit-based quantum information to be applied in the continuous-variable setting. We give a detailed example based on a modular decomposition of the position basis and apply it in two situations. First, we decompose Gottesman-Kitaev-Preskill grid states and find that the encoded…

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October 2020

CQC2T Online Seminar: Imaging ultrathin van der Waals magnets with a quantum diamond microscope – Jean-Philippe Tetienne

October 27, 2020 @ 2:00 pm - 3:00 pm

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…

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UNSW Physics Student Seminar – Matt Donnelly

October 23, 2020 @ 10:30 am - 11:00 am

Matt Donnelly Three Dimensional Monolithic Control of Atomic-Scale Devices in Silicon The spin of an electron bound to a phosphorus donor in silicon (Si:P) is a prototypical two-level quantum system proposed as a qubit for quantum computing. Fundamental operations (initialisation, read-out with single qubit and two qubit gates) required for using this system for quantum information processing have been demonstrated in the past decade, with attention now turning towards how to scale up this system to the large arrays needed…

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CQC2T Online Seminar: Exploiting a Single‐Crystal Environment to Minimize the Charge Noise on Qubits in Silicon – Ludwik Kranz

October 13, 2020 @ 2:00 pm - 3:00 pm

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

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September 2020

CQC2T Online Seminar: Speakers Ruvi Lecamwasam and Hao Jeng – ANU

September 29, 2020 @ 2:00 pm - 3:00 pm

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…

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QSI UTS Online Seminar: Building Multiple Access Channels with a Single Particle – Prof Eric Chitambar, UIUC

September 22, 2020 @ 11:00 am - 12:00 pm

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…

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QSI UTS Online Seminar: Strategies for quantum optimisation algorithms with short run-times – Dr Viv Kendon, Durham University, UK

September 17, 2020 @ 4:00 pm - 5:00 pm

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.…

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CQC2T Online Seminar: A strong no-go theorem on the Wigner’s friend paradox – Prof Howard Wiseman & Kok-Wei Bong

September 15, 2020 @ 2:00 pm - 3:00 pm

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…

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QSI UTS Online Seminar: Coherent electrical control of a high spin nucleus in silicon – Dr Vincent Mourik, CQC2T

September 15, 2020 @ 8:00 am - 9:00 am

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…

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QSI UTS Online Seminar: Quantum versus classical learnability of discrete distributions – Dominik Hangleiter

September 10, 2020 @ 5:00 pm - 6:00 pm

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…

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QSI UTS Online Seminar: Q# and the Quantum Development Kit – Dr Sarah Kaiser

September 8, 2020 @ 10:00 am - 11:00 am

SPEAKER: Dr Sarah Kaiser, WA, USA TITLE: Q# and the Quantum Development Kit: Research and program quantum algorithms in the way you think about them. ABSTRACT: As the field of quantum computing expands from the academic to the industry realm, we need a way that we can continue to collaborate and innovate in both regimes. Open source quantum software development platforms like the Quantum Development Kit and Q# from Microsoft, serve as a bridge to connect research ideas to reality. In…

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