Researchers successfully simulated Google’s 53-qubit Sycamore quantum circuit seven times faster than the original quantum computer using 1,432 GPUs and innovative tensor network algorithms, effectively refuting Google’s quantum advantage claim.
Scientists have discovered and experimentally confirmed the existence of “quadruplons,” genuine four-body quasi-particles consisting of two electrons and two holes tightly bound together in a monolayer semiconductor, which represent a fundamentally new type of matter excitation beyond previously known quasi-particles like excitons and bi-excitons.
UCL researchers have developed a groundbreaking technique using arsenic atoms in silicon that achieves a 97% success rate for single-atom placement (compared to phosphorus’s 70%), potentially solving quantum computing’s twin challenges of error rates and scalability through scanning tunneling microscopy hydrogen resist lithography.
A groundbreaking theory bridges quantum mechanics and general relativity by treating the spacetime metric as a quantum operator and introducing an entropy-based gravitational action that yields modified Einstein equations with an emergent cosmological constant, potentially explaining cosmic expansion and dark matter through a novel auxiliary “G-field.”
Harvard scientists have developed a groundbreaking photon router that creates an optical interface between light signals and superconducting microwave qubits, potentially solving a major quantum computing challenge by enabling different quantum systems to communicate efficiently without bulky wires, thus bringing distributed, fiber-optic-based quantum computers closer to reality.
Researchers at the Advanced Quantum Testbed (AQT) at Lawrence Berkeley National Laboratory (Berkeley Lab) conducted the first experimental demonstration of a three-qubit high-fidelity iToffoli native gate in a superconducting quantum information processor and in a […]
Researchers at the U.S. Department of Energy’s (DOE) Argonne National Laboratory and the University of Chicago performed quantum simulations of spin defects, which are specific impurities in materials that could offer a promising basis for […]
Qunnect was awarded two SBIR awards from the US Department of Energy totaling $1.85M for the development and commercialization of the company’s Quantum Repeater product suite. When complete, this collection of devices supports the next generation […]
A laser pulse that sidesteps the inherent symmetry of light waves could manipulate quantum information, potentially bringing us closer to room temperature quantum computing. While laser pulses can be used to manipulate the energy states […]
Variational Quantum Algorithms (VQAs) are expected to be a path to quantum advantages on noisy intermediate-scale quantum devices. However, both empirical and theoretical results exhibit that the deployed ansatz heavily affects the performance of VQAs […]
Scientists have been relentlessly working on understanding the fundamental mechanisms at the base of high-temperature superconductivity with the ultimate goal to design and engineer new quantum materials superconducting close to room temperature. A team of […]
A team of scientists at IBM Quantum used laser annealing to selectively tune transmon qubits into the desired frequency patterns. Superconducting quantum processors with more than 50 qubits are currently actively available and these fixed […]
It has been conjectured that counterfactual communication is impossible, even for post-selected quantum particles. A team of researchers has strongly challenged this by proposing precisely such a counterfactual scheme where—unambiguously—none of Alice’s photons that correctly […]
A team of researchers affiliated with several institutions in China has found that Quantum Key Distribution (QKD) networks can be used to accurately measure ground vibration. They have implemented a twin-field, fiber-based QKD network over […]
Researchers at University of Central Florida are developing new photonic materials that could one day help enable low power, ultra-fast, light-based computing. The unique materials, known as topological insulators, are like wires that have been […]
A team of researchers has built an intelligent sensor—the size of about 1/1000 of the cross-section of a human hair—that can simultaneously detect the intensity, polarization and wavelength of light, tapping into the quantum properties […]
At first glance, a system consisting of 51 ions may appear simple. But even if these charged atoms can only assume two different states, there will be more than two quadrillion (1015) different configurations which the system can […]
Researchers have introduced an inductive n-qubit pure-state estimation method based on projective measurements on mn + 1 separable bases or m entangled bases plus the computational basis, with m ≥ 2. The method exhibits a favorable scaling in the number of qubits compared to […]
A new project undertaken by a University of Birmingham researcher at the UK Quantum Technology Hub Sensors and Timing along with colleagues in the School of Engineering will help to facilitate greater sustainability for future […]
Scientists have demonstrated that wires more than 100 times thinner than a human hair can act like a quantum one-way street for electrons when made of a peculiar material known as a topological insulator. The […]
Boson Sampling is a computational paradigm representing one of the most viable and pursued approaches to demonstrate the regime of quantum advantage. Recent results have shown significant technological leaps in single-photon generation and detection, leading […]
Researchers at the Max Planck Institute of Quantum Optics succeeded in massively improving the performance of a component that is crucial to optical quantum systems. Future quantum computers are expected not only to solve particularly […]
A new two-path-interference experiment has been designed at TU Wien that only has to measure one specific particle to prove quantum superposition. A single neutron is measured at a specific position — and due to […]
A team of researchers from Université Paris-Saclay, the University of Ulm and the Institute of Quantum Technologies has developed an on-chip circuit that produces up to six microwave photons at the same time. The circuit […]
The mixing of conduction band valleys plays a critical role in determining electronic spectrum and dynamics in a silicon nanostructure. Researchers have investigated theoretically how valley–orbit coupling affects the exchange interaction in a silicon double […]
Computational detective work by physicists has confirmed cerium zirconium pyrochlore is a 3D quantum spin liquid, a solid material in which quantum entanglement and the geometric arrangement of atoms cause electrons to fluctuate between quantum […]
Quantum entanglement is a key resource in quantum technology, and its quantification is a vital task in the current noisy intermediate-scale quantum (NISQ) era. Researchers have combined hybrid quantum-classical computation and quasi-probability decomposition to propose […]
A researcher at EPFL explored the relationship between entanglement and the wave-particle duality of each subsystem.
Researchers have developed a protocol for entanglement generation in the Quantum Internet that allows a repeater node to use n-qubit Greenberger-Horne-Zeilinger (GHZ) projective measurements that can fuse n successfully entangled links, i.e., two-qubit entangled Bell pairs shared across n network edges, […]
A collaboration between Harvard University with scientists at QuEra Computing, MIT, University of Innsbruck and other institutions has demonstrated a breakthrough application of neutral-atom quantum processors to solve problems of practical use. Previously, neutral-atom quantum […]