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Enjoy today’s breakdown of news, research, events & jobs within quantum.

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IN TODAY’S ISSUE:

Tags: PHOTONIC BOSON SAMPLING NOVEL FRAMEWORKS

• Innovation Fund Denmark grants DKK 16.2 million ($2.34 million) to Denmark’s Fault-Tolerant Quantum Photonics project with the hope to secure fault-tolerant quantum computers through single-photon quantum emitters

• A new framework carried out via quantum computation will enlighten us on the underlying physics of the interaction between many-body systems and their environments

• Successful boson sampling conducted using ultracold atoms in 2D lattice far exceeds classical capabilities

• Plus, that $20 billion Chicago project, how pointillism art is providing insight into quantum magnetic states, and circular Rydberg atoms overcome the lifetime limitations of traditional Rydberg atoms

BRIEF BYTES

NEWS FOR THOSE IN A HURRY

• The grapevine seems to be saying that Illinois Governor Jay Robert Pritzker is considering a $20 billion project to establish a quantum computing hub in Chicago, in a “Manhattan Project” of sorts but for quantum. The project could include a 150-acre complex with PsiQuantum as a key tenant and is expected to create thousands of jobs. While ambitious, this initiative builds on previous state investments in quantum technology.

• JPMorgan Chase has launched a quantum-secured, high-speed network that uses quantum key distribution to protect data across two data centers. This network not only supports high-speed VPNs but also acts as a platform to test advanced quantum technologies in securing real-world financial services.

• Using “quantum pointillism," ETH researchers have studied a unique type of magnetism by visualizing interactions in quantum systems through highly detailed, color-coded images. This technique involves using ultracold atoms in a 2D optical lattice manipulated with optical tweezers to simulate and investigate complex magnetic phenomena such as the Nagaoka mechanism. This mechanism was a theoretically predicted behavior that they’ve now confirmed experimentally. This provides a direct method to observe quantum magnetic states and could likely advance our understanding of high-temperature superconductivity.

• Researchers at the University of Stuttgart's 5th Institute of Physics have demonstrated the generation of circular Rydberg states of strontium atoms within optical tweezers which is a step toward overcoming the longevity challenges of traditional Rydberg atoms used in quantum technology. This breakthrough contributes to the stability and error-resistance of qubits as well as the potential for scalable quantum computing architectures.

• Quantum Machines announced the deployment of three OPX1000 quantum controllers to Sungkyunkwan University's Quantum Computing lab in Seoul as part of South Korea's national initiative toward progress in quantum computing capabilities. The controllers will support the Quantum Information Research Support Center's goals to develop quantum education, workforce, and infrastructure.

TOP HEADLINES IN NEWS & RESEARCH

NEWS

Tags: PHOTONIC

DENMARK IS LIGHTING THE WAY TO PHOTONIC FAULT-TOLERANCE WITH NEW GRANT

Photonic technologies have consistently proved themselves synonymous with progress in quantum computing. Denmark has clearly taken note and just announced a new five-year initiative centered around photonic quantum computing, supported by a DKK 16.2 million grant from Innovation Fund Denmark.

Building on over two decades of leadership in photonic quantum technology, Denmark's FTQP project combines the expertise of the University of Copenhagen’s Department of Computer Science, the Niels Bohr Institute, and industry leader Sparrow Quantum. The ‘Fault-Tolerant Quantum Photonics’ project will be pushing for fault-tolerant architectures based on deterministic single-photon emitters.

Research from the Niels Bohr Institute published earlier this year presented a new architecture that uses photonic quantum emitters to create spin-qubit cluster states optimized for emitters with limited memory. The design improves upon photon loss tolerance by using a non-adaptive fusion process and exploring different geometrical structures for merging entangled photons.

The resulting improvements in photon loss tolerance compared to other photonic schemes makes the single-photon emitter method a reasonable candidate for fault-tolerant quantum computing platforms.

With the FTQP project, Denmark is not just advancing its own frontiers and continuing its reign in photonic innovation, but is also setting a global benchmark in photonic quantum computing.

RESEARCH

Tags: NOVEL FRAMEWORKS

OVERVIEW OF A LINEAR RESPONSE FRAMEWORK FOR QUANTUM SIMULATION OF BOSONIC AND FERMIONIC CORRELATION FUNCTIONS

The Brief Byte: Researchers demonstrate an efficient calculation of bosonic and fermionic Green’s functions, showing that using a linear response framework on quantum computers may help us better understand many-body systems.

Breakdown:

• Quantum computing excels in simulating many-body systems and gives us a better grasp of complex interactions in physics and chemistry. Response functions, especially Green's functions for bosons and fermions, are central to analyzing particles' behaviors and dynamics in these systems. Existing methods to compute these functions include Hadamard tests and variational techniques, but there's a demand for new methods that directly connect simulation and experiment, are selective in frequency and momentum, and overcome the limitations of direct measurability in current techniques.

• The method involves stimulating the quantum system with a precisely structured field and measuring its response which directly calculates the correlation functions necessary for experimental validations. This linear response framework allows for diverse operators in a single quantum circuit which minimizes errors and improves computational efficiency.

• The study demonstrated the linear response method's superiority over traditional techniques like the Hadamard test by applying it to charge-density-wave materials and Hubbard models. It reduces the need for multiple quantum circuits, lessens error accumulation, and makes it possible for the simultaneous measurement of numerous correlation functions. The ability to handle fermionic and bosonic functions within the same framework is a significant advancement, especially for electronic systems where it can simplify the calculation of electron Green's functions.

RESEARCH

Tags: BOSON SAMPLING

OVERVIEW OF AN ATOMIC BOSON SAMPLER

The Brief Byte: This research overcomes traditional photonic challenges of boson sampling (think, simplified quantum computing) by utilizing ultracold atoms in a 2D optical lattice in combination with high-fidelity cooling, imaging, and programmable optical tweezers.

Breakdown:

• Photons are more traditionally preferred in boson sampling as they can occupy the same quantum state, which is fundamental to boson sampling where indistinguishability is key. Ultracold atoms are used over photons for boson sampling in this approach due to the ease of manipulation which led to high-fidelity state preparation and minimal loss during evolution. This makes them suitable for complex quantum simulations. This study was able to demonstrate an advanced boson sampling experiment using up to 180 atoms across over 1,000 lattice sites, which is a scale not classically doable.

• The research team used optical tweezers to arrange strontium atoms into predetermined patterns on a 2D optical lattice. They cooled the atoms to their ground state and manipulated them through the lattice using finely tuned lasers while observing the quantum behavior of these non-interacting bosons. The detailed examination of the atoms' quantum states post-evolution was used to verify the quantum mechanical processes involved in boson sampling.

• Overall, the study shows that ultracold atoms could effectively mimic particles in boson sampling experiments. The techniques developed could lead to better simulations of quantum materials and provide insights into the foundations of quantum mechanics which in turn is relevant to the development of quantum computing technologies.

EVENTS

• Sunday, May 12 | Quantum Reliability: Circuit Susceptibility, Faults, and Integration Issues by Washington DC Quantum Computing Meetup

• Monday, May 13 | D-Wave conference call on Q1 2024 financial results

• Thursday, May 16 | Report on Quantum Computing in the Global South by the Centre for Quantum and Society

• Monday, May 20 | Stanford Responsible Quantum Technology Conference

• Now - May 31 | Register for Google/X-Prize Quantum Challenge

JOBS POSTED WITHIN LAST 24 HOURS

• Microsoft Quantum Measurement Physicist | Redmond, WA (Hybrid) $120.9K - $198.6K

• Microsoft Senior Packaging Engineer - Quantum | Redmond, WA $112K - $238.6K

• Google Hardware Lab Generalist, Fabrication Equipment, Quantum AI | Goleta, CA $81K - $119K

• Google Hardware Assembly Technician, Quantum AI | Goleta, CA $81K - $119K

• Google Senior Hardware Engineer, Fabrication Equipment, Quantum AI | Goleta, CA $142K - $211K

• Quantum Computing Inc. Product Manager, Photonic Components and Foundry Services | Tempe, AZ

UNTIL TOMORROW.

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