ARC Centre for Quantum Computation and Communication Technology

Congratulations to Dr Luis Villegas Aguilar from #CQC2T's Griffith University node, winner of a recent poster competition for his research on 'Broadcasting Quantum Nonlocality'. This recognition was part of the 2018 Nobel Laureate, Professor Donna Strickland's National Australian Tour, as part of the International Year of Quantum Science and Technology. The Australian Institute of Physics (AIP), in partnership with Defence Science and Technology Group (DSTG), ARC Centre of Excellence for Engineered Quantum Systems (EQUS), ARC Centre of Excellence in Quantum Biotechnology (QUBIC), QUT (Queensland University of Technology), The University of Queensland and Griffith University welcomed Nobel Laureate Professor Donna Strickland to Australia in July 2025. Her pioneering work in laser physics has enabled innovations in medical and industrial technologies. During the tour, Professor Strickland visited four Australian cities to engage with researchers. During this event, Prof Strickland joined a panel of judges to review over 40 digital poster presentations by HDR and ECR researchers, of which Dr Villegas Aguilar was presented as the winner. Congratulations Luis.

Breaking New Ground in Photonic Quantum Processing ARC Centre for Quantum Computation and Communication Technology (CQC2T) is proud to celebrate the publication of a research milestone from our RMIT node. Congratulations to Dr Akram Youssry and Associate Professor Alberto Peruzzo on their newly published paper in Quantum Science and Technology: Universal Programmable Waveguide Arrays Read the full paper: https://lnkd.in/gtuxeezc This work marks a major milestone for Dr Youssry, laying the rigorous mathematical foundations for programmable waveguide arrays (PWAs). The authors of this paper prove that cascaded architectures of PWAs are universal, meaning they can implement any unitary transformation. This is a crucial requirement not just for quantum computing but also for advanced applications in machine learning, secure communication, and signal processing. Reflecting on the project, Dr Youssry recalls its origins in 2018, sparked by a deceptively simple question from the then Program Manager of the Photonic Quantum Processor Program at our Victorian node A Prof Peruzzo: “What class of operations can we do with this PWA technology?” This question sparked one of the most technically challenging projects of Ddr Youssry's research career, research over seven years that, at times, seemed unlikely to succeed. Through sustained persistence, the team developed a rigorous theoretical framework that now underpins the Centre’s photonic quantum processor program and broadens its future applications. This publication represents just one outcome of seven years of work—and a powerful reminder of where perseverance in science can lead. A fantastic achievement for Akram, Alberto, and the entire photonic team at RMIT University. #quantum #IYQ25

University of Technology Sydney is searching for a low-cost, verifiable quantum advantage in their latest two published papers. The team is addressing two key questions: Can we achieve classically verifiable quantum advantage at a quantum cost lower than, say, factoring? What are the mathematical features of quantum computations that might enable such an advantage? This is the challenge Professor Michael Bremner and his team explore in a newly published paper co-authored with Dr Bin Cheng (National University of Singapore) and Professor Zhengfeng Ji (Tsinghua University). In this work, they introduce the IQP stabiliser scheme, a framework for establishing verifiable tests of quantum computing resources based on a cryptographic assumption we refer to as the Hidden Structured Code problem. This builds upon foundational work Dr Dan Shepherd and Professor Bremner conducted in 2008. This research was initiated during Bin’s PhD, co-supervised by Zhengfeng and Professor Bremner during their time at UTS. It’s a significant achievement, and #CQC2T is celebrating this recent publication in PRX Quantum. Read Mick Bremner's Op-ed: https://lnkd.in/gpsK73Ny Publications: PRX Quantum: https://lnkd.in/gU8UDEAT Proceedings of the Royal Society A: https://lnkd.in/gUTfzxe3 #quantum

Great science communicators play a critical role in bridging the gap between scientific communities and the general public. At #CQC2T we understand that quantum physics is a complicated subject area, but effective communicators can make complex concepts accessible. Talented scientists like ours can help people recognise how scientific research impacts their everyday lives. In 2024, five members of CQC2T (Dr Danielle Holmes, Dr Holly Stemp, Dr Luis Villegas Aguilar, Dr Lara Gillan and Dr James Stuart) embraced this philosophy and made us all laugh out loud. Debuting this weekend is Dr Alison Goldingay - best of luck. Future Science Talks Sydney Comedy Edition Saturday, 3 May, Factory Theatre, Marrickville, 5.15pm. Tickets: https://lnkd.in/gDDMWAJk

Three new examples of qudit spin models were solved in a paper from the #CQC2T University of Technology Sydney node. These findings are from our Quantum Algorithms and Complexities Program, published this week. The research focused on identifying conditions under which certain quantum spin systems can be exactly solved using a graph-theoretic approach involving particles known as parafermions. A central tool in the analysis is the frustration graph, which captures relationships between components of the system. The results show that if this graph possesses a specific structure — referred to as an oriented indifference graph — then the system can be exactly solved using parafermions. It was also demonstrated that some systems are solvable if their frustration graph can be rearranged in a certain way. In such cases, the system exhibits a set of properties that make it integrable. An efficient algorithm is provided to determine when this condition holds. These findings extend earlier work on systems involving fermions, and the method is applied to solve three new examples of qudit spin models. A graph-theoretic framework for free-parafermion solvability Dr Ryan Mann, Samuel Elman, David R. Wood, Adrian Chapman https://lnkd.in/dHiCq2K5 #Quantum #IYQ25 #QuantumAlgorithms

Two new studies suggest optical computing, which uses light to process data, is edging closer to becoming a faster, more energy-efficient alternative to conventional systems. "[Photonic computers] do have advantages over electronic computers in terms of energy efficiency, and possibly in terms of speed," said Dr Akram Youssry, RMIT University Postdoctoral Fellow, in a recent Australian Broadcasting Corporation (ABC) Science article ‘Computer chips processing data using power of light could help reduce AI's energy needs’. Dr Youssry's research is part of the Photonic Quantum Processor Program at #CQC2T. Read here: https://lnkd.in/gT7HXsaU

Happy World Quantum Day! In this International Year of Quantum Science and Technology, we are celebrating the creativity and innovation within the quantum research community. Thank you to Dr Jesse Everett, from The Australian National University node at #CQC2T, for sharing this striking graphic. His artwork represents a method for performing a time-frequency fractional Fourier transform within an optical #quantum memory. The outputs of this transform resemble patterns made by laser light passing through an aperture before diffracting in the far field. This image is compiled from simulations of the memory performing 2000 different transform angles. #IYQ25 #WorldQuantumDay #QuantumScience

Congratulations to our two Centre start-up companies who secured contracts with the US Defense Advanced Research Projects Agency (DARPA), for a coveted benchmarking program designed to identify companies capable of achieving utility-scale within the next decade. Diraq and Silicon Quantum Computing will take part in the first stage of the Quantum Benchmarking Initiative over the next six months. Among the quantum computing approaches being tested are supercomputing qubits, trapped ion qubits, natural atom qubits, photonic qubits and semiconductor spin qubits. Read further: https://lnkd.in/gQjnUwmQ #quantum

Celebrating our Centre Director Professor Michelle Simmons for this esteemed acknowledgment of her contributions to Science. Congratulations Michelle.

Celebrating Women in STEM: International Day of Women and Girls in Science In recognition of this day in February this insightful interview with Dr Danielle Holmes, UNSW is being re-shared. Danni breaks down the fundamentals of quantum computing, whilst she and Biliana R. offer invaluable advice for aspiring quantum enthusiasts, including the challenges women face in #STEM and the importance of representation in this field. Expand your understanding of the future of computing—and the inspiring women leading the way. #womeninSTEM #QuantumComputing #IYQ2025 https://lnkd.in/d7Fqq2Zr