Princeton physicists accidentally discovered and directly visualized Hofstadter’s butterfly—a theoretical fractal pattern of electron energy levels predicted in 1976—using scanning tunneling microscopy on twisted bilayer graphene, revealing not only the long-sought fractal energy spectrum but also new quantum phenomena driven by electron interactions beyond Hofstadter’s original calculations.
D-Wave Quantum Inc. has achieved the world’s first demonstration of quantum computational supremacy on a useful real-world problem, using their Advantage2 prototype quantum annealer to perform complex magnetic materials simulations in minutes that would take a classical supercomputer nearly one million years and consume more than the world’s annual electricity.
Researchers at China’s USTC have developed Zuchongzhi-3, a groundbreaking 105-qubit quantum computer that processes calculations 10^15 times faster than the most powerful supercomputers and one million times faster than Google’s latest quantum systems, marking a significant advancement in quantum supremacy.
Amazon Web Services has unveiled Ocelot, a groundbreaking quantum chip that uses cat qubits and bosonic quantum error correction to significantly reduce resource requirements, achieving bit-flip times approaching one second while requiring only one-tenth the resources of traditional approaches, potentially revolutionizing the path to commercially viable quantum computing.
IonQ is acquiring a controlling stake in quantum safe networking leader ID Quantique (IDQ) to strengthen its global quantum ecosystem, accelerate quantum networking development, and establish a strategic partnership with SK Telecom, with the acquisition expected to close in Q2 2025.
QuTech researchers, collaborating with Fujitsu and Element Six, have achieved a significant quantum computing milestone by demonstrating diamond spin-based quantum gates with error rates below 0.1%—satisfying a critical threshold for quantum error correction and bringing us one step closer to scalable quantum computation.
A quantum internet protocol using minimum cost aggregation and network concatenation enables efficient distribution of entangled bits with bounded error between arbitrary clients across multiple quantum networks regardless of distance, overcoming previous limitations and forming the necessary foundation for global-scale quantum networking.
A research team has achieved a breakthrough in quantum communication by implementing an eight-dimensional quantum superdense coding protocol on a 16-mode photonic chip, demonstrating an unprecedented channel capacity exceeding 3 bits through the generation of high-fidelity entangled quDit states and efficient Bell state measurements that distinguish eleven orthogonal states, significantly outperforming classical communication limits.
Researchers propose a novel quantum sensing protocol that uses in-cavity squeezed states and optimized transient control to mitigate the Rayleigh curse limitation, enabling more sensitive dark matter detection in microwave cavities without requiring non-Gaussian quantum resources that would be incompatible with the strong magnetic fields needed for axion searches.
Researchers have successfully created quantum holograms using metasurfaces, enabling unprecedented control over entangled photon pairs where the polarization of one photon can selectively erase holographic content in its partner, demonstrating precise quantum control with applications in secure communication and anti-counterfeiting technology.
Stochastic Quantum Signal Processing integrates randomized compiling into quantum signal processing to achieve quadratic error suppression (ϵ → O(ϵ²)), reducing query complexity by nearly half across multiple quantum algorithms including Hamiltonian simulation, phase estimation, ground state preparation, and matrix inversion.
Researchers successfully observed “dissipative phase transitions” in quantum systems using a superconducting Kerr resonator at near-absolute zero temperatures, revealing phenomena like “squeezing,” metastability, and “critical slowing down” that could revolutionize quantum computing and sensing technologies through enhanced stability and precision.
Researchers from the Quantum Internet Alliance have created QNodeOS, the first operating system for quantum networks, which abstracts hardware complexity to enable easier development of quantum networking applications across different hardware platforms, marking a crucial step toward making quantum internet technology accessible and practical.
The Quantum Zeno Monte Carlo algorithm bridges the gap between noisy intermediate-scale quantum and fault-tolerant quantum computing eras by offering polynomial computational complexity and resilience to both device noise and Trotter errors without requiring initial state overlap or variational parameters, as demonstrated on IBM’s NISQ devices with up to 12 qubits.
The researchers propose a digital-analog quantum computing approach using superconducting circuits to efficiently simulate the Hubbard-Holstein model of fermion-boson interactions with high fidelity, outperforming purely digital methods and offering applications in materials science, chemistry, and high-energy physics.
Quantum convolutional neural networks successfully identify known quantum many-body scars with over 99% accuracy in simulations and 63% on IBM quantum hardware, while also discovering new non-thermal states that can be characterized as spin-wave modes of specific quasiparticles in complex quantum systems.
Lead halide perovskite quantum dots covered with stacked phenethylammonium ligands exhibit nearly non-blinking single photon emission with high purity (~98%) and extraordinary photostability (12+ hours), solving critical surface defect issues through π-π stacking interactions that create a stabilizing epitaxial ligand layer, enabling reliable room-temperature quantum emission for advanced computing and communication applications.
Researchers created a nanoscale ferroelectric moiré pattern using hexagonal boron nitride layers to generate a purely electrostatic potential that enhances Coulomb interactions in transition metal dichalcogenides, enabling optical detection of electron correlations and ordered states while opening pathways to explore exotic quantum phenomena like chiral layer-pseudospin liquids and kinetic magnetism.
Researchers from Chinese universities have revolutionized quantum computing by developing metasurfaces that generate and manipulate entangled photons more efficiently than traditional methods, potentially enabling smaller quantum computers and robust quantum networks.
Researchers achieved a groundbreaking advancement in photonic quantum computing by implementing a boosted Bell-state measurement with a success probability of 69.3%, significantly exceeding the conventional 50% limit and demonstrating a threefold improvement in photon-loss tolerance for fault-tolerant fusion-based quantum computing.
Recent experiments with superconductor-quantum dot hybrids demonstrate that contact-induced level broadening and hybridization effects in thermoelectric Cooper pair splitters lead to shifted resonances and parity reversal in thermoelectric current, revealing new avenues for harnessing nonlocal quantum correlations in solid-state systems through gate voltage control.
Quantum error correction experiments face a trade-off where unconditional qubit reset can theoretically double error tolerance during logical operations, but no-reset approaches perform better in practice when reset operations are slow or error-prone, prompting the development of novel syndrome extraction circuits to mitigate these limitations.
A quantum photonics researcher who pioneered the miniaturization of cold atom trapping systems through integrated photonics at UC Santa Barbara, successfully developing the first photonic integrated 3D magneto-optical trap (PICMOT) that enables portable quantum technologies with applications in precision sensing, timekeeping, and quantum computing.
Researchers developed practical zero-noise extrapolation techniques for quantum annealing that successfully mitigate both thermal and non-thermal errors in quantum systems without additional qubit overhead, demonstrated through experiments on a transverse-field Ising spin chain that aligned well with theoretical predictions.
Researchers have achieved a breakthrough in quantum teleportation by using ancillary photonic states to surpass the 50% Bell-state measurement success probability limit of linear optics, demonstrating an impressive 69.71% acceptance rate with high fidelity (0.8677) on arbitrary input states from independent sources, representing the first practical implementation of Boosted Quantum Teleportation with significant implications for quantum repeaters, communications, and computation.
Researchers have demonstrated circuit-based leakage-detection units that nondestructively identify atom-loss errors in neutral-atom quantum computers with 93.4% accuracy, including a “swap” variant that exchanges data and ancilla atoms, enabling quantum information to potentially outlive individual atoms in the quantum register.
Researchers theoretically demonstrate that Floquet Majorana fermions in periodically driven topological superconductors create 4π-periodic Josephson currents with amplitudes that can be tuned by aligning chemical potentials with drive frequency harmonics, yielding a novel “Josephson Floquet sum rule.”
Researchers have achieved a breakthrough in quantum networking by creating a two-node system with multiple rare-earth ions per node that enables multiplexed entanglement distribution and multipartite state preparation, overcoming traditional single-qubit limitations and laying the groundwork for scalable quantum networks with applications in computing, communication, and sensing.
Time interfaces in materials with suddenly changing refractive indices create unique quantum optical phenomena including photon-pair production and destruction, tunable photon statistics, and opportunities for quantum state engineering.
Using machine learning-optimized quantum locking techniques, scientists have transformed the previously limiting nonlinear Zeeman effect in Earth-field magnetometers into a quantum advantage by stabilizing naturally occurring spin squeezed states, enabling measurements beyond the standard quantum limit.