Monday, September 2nd, 2024

Enjoy a nice cup of freshly brewed quantum news ☕️ 

Today’s issue includes:

• Researchers at Aalto University developed an on-chip hot-electron bolometer that adds to our understanding of energy dissipation in Josephson junctions, which are used in quantum computers.

• National University of Singapore researchers achieved accurate simulations of higher-order topological lattices on digital quantum computers.

• A new framework for hybrid analog-digital quantum signal processing allows the conversion of quantum signals between discrete-variable and continuous-variable systems.

And even more research, news, & events within quantum.

On-Chip Bolometer Developed for High-Frequency Detection of Josephson Radiation in Quantum Devices

QUICK BYTE: Researchers at Aalto University developed an on-chip hot-electron bolometer capable of detecting and characterizing high-frequency Josephson radiation, an important step in understanding energy dissipation in Josephson junctions, which are fundamental components of quantum computers.

DETAILS: 

• An on-chip hot-electron bolometer, integrated with a normal-metal–insulator–superconductor thermometer, has been developed to detect and measure the temperature changes caused by Josephson radiation.

• This bolometer converts the high-frequency alternating current (a.c.) signal from Josephson junctions into a measurable direct current (d.c.) signal, allowing researchers to study energy dissipation mechanisms that are difficult to observe with conventional methods.

• This could lead to improvements in the coherence and performance of quantum devices by enabling more precise control over energy dissipation in Josephson junctions, with implications for the future development of quantum computing technologies.

National University of Singapore Researchers Simulate Higher-Order Topological Lattices Using Digital Quantum Computers

QUICK BYTE: Researchers from the National University of Singapore have achieved accurate simulations of higher-order topological lattices on digital quantum computers.

DETAILS: 

• Researchers at the National University of Singapore (NUS) simulated higher-order topological (HOT) lattices with unprecedented accuracy on digital quantum computers, which promotes the understanding of advanced quantum materials.

• The method presented by the team encodes high-dimensional HOT lattices into spin chains scalably, using qubits while minimizing resource usage and increasing resilience to noise.

• The ability to simulate high-dimensional HOT lattices suggests new research directions in quantum materials and topological states, which have gained significant interest due to their unique properties, such as defect-resistant electron flow along edges

Hybrid Analog-Digital Quantum Signal Processing

QUICK BYTE: Researchers from North Carolina State University, MIT, Yale University, and Brookhaven National Laboratory developed a new framework for hybrid analog-digital quantum signal processing, enabling the conversion of quantum signals between discrete-variable and continuous-variable systems.

DETAILS: 

• The study presents a new paradigm for mixed analog-digital quantum signal processing, focusing on quantum AD/DA conversion between discrete-variable and continuous-variable quantum systems, which allows for the transfer of quantum states between qubits and oscillators.

• This bridges the gap in quantum signal processing by enabling the processing of quantum signals on hybrid CV-DV quantum hardware, overcoming the limitations of purely digital or analog quantum systems.

• The ability to perform quantum AD/DA conversion and implement quantum algorithms like the Fourier transform on CV-DV systems could influence more scalable quantum computing architectures.

🧬 Researchers from California State University Northridge, Stockholm University, and MIT have predicted a new quantum anomalous state of matter within fractionally filled moiré superlattice bands in a twisted bilayer. This state, which combines ferromagnetism, charge order, and topology, may have significant implications for quantum technologies by providing a new avenue for developing topologically protected quantum states in strongly interacting materials relevant to quantum computing and other quantum-based applications.

⚛️ A team at Université Paris-Saclay and École polytechnique applied the ADAPT-VQE quantum algorithm to the neutron-proton pairing problem in atomic nuclei, demonstrating that quantum computing can effectively describe complex nuclear interactions. Their study highlights the potential of quantum technologies to outperform classical methods in nuclear structure calculations and potentially provide more accurate and efficient modeling of atomic nuclei.

🚧 Researchers from Forschungszentrum Jülich, RWTH Aachen University, Virginia Tech, and Università di Brescia introduced the Zero-Entropy Classical Shadow methodology for reconstructing of density state operators on quantum devices, such as IBM's quantum processors. ZECS improves the accuracy of quantum state diagnostics by mitigating noise and errors, which optimizes qubit selection and improves the performance of quantum algorithms.

📱 SK Telecom and ID Quantique announced that the Samsung Galaxy Quantum 5 will integrate quantum security technology with Samsung Knox. The device includes a Quantum Random Number Generator chipset that generates true random numbers to protect sensitive data during authentication and encryption processes and additional protection for a wide range of mobile applications, from financial services to social media, ensuring users' data security.

🌐 Engineers at the University of Padua and Padua Quantum Technologies Research Center developed a hybrid encoder compatible with discrete and continuous variable quantum key distribution protocols. Using an iPOGNAC modulator, this encoder seamlessly switches between discrete and continuous variable modes, making it a versatile solution for quantum networks. The innovation, designed with commercial-off-the-shelf components, is suited for space-based quantum communication systems, where polarization-based protocols are commonly used.

LISTEN

The newest episode of the Quantum AI Podcast by Taha Selim discusses the importance of patenting in the tech industry, particularly in software, AI, and quantum computing, featuring insights from Dr. Benjamin Delsol on effective patent strategies, cross-licensing, and the challenges of patenting in different regions and for open-source software.

ENJOY

If you took an interest in the above study on neutron-proton pairing, try your hands at the below tutorial from PennyLane, where you can use the VQE algorithm to calculate the ground energy of a hydrogen molecule 👇️ 

WATCH

Brian Greene and Seth Lloyd discuss the fundamental principles of quantum mechanics, quantum computers, and associated challenges:

• On Thursday, September 5th, paper submissions are due for the 23rd International Conference on Machine Learning and Applications.