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 have achieved a major quantum computing breakthrough by using a 56-qubit quantum computer to generate certifiably random numbers verified by classical supercomputers, marking a shift from theoretical quantum advantage to practical application with significant implications for cryptography, security, and fairness.
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.
Superconductors are used in a wide range of domains, from medical applications to a central role in quantum computers. Superconductivity is caused by specially linked pairs of electrons known as Cooper pairs. So far, the […]
A team of researchers from Xanadu and the NIST is claiming that their quantum computer, Borealis, has achieved computational advantage in taking on the boson sampling challenge. The researchers took on the challenge using a […]
Extending the field of quantum metrology i.e., magnetometry, electrometry, and thermometry to the atomic scale requires robust sensors with high sensitivity and spatial resolution. Optically addressable spins in diamond are excellent candidates as they often […]
Ultrashort infrared light pulses are the key to a wide range of technological applications. The oscillating infrared light field can excite molecules in a sample to vibrate at specific frequencies, or drive ultrafast electric currents […]
In a special arrangement of atomic spins, Max Planck physicists have measured the properties of the so-called Haldane phase in an experiment. To do so, they used a quantum mechanical trick. In some materials, there […]
Engineers are developing commercial microphones focus on eliminating technical sources of noise, such as that found in the signal amplifiers. But even when the technical noise sources are addressed, there is still a fundamental noise stemming […]
A time crystal is a macroscopic quantum system in periodic motion in its ground state. In our experiments, two coupled time crystals consisting of spin-wave quasiparticles (magnons) form a macroscopic two-level system. The two levels evolve in time as determined intrinsically by a nonlinear feedback, allowing us to construct spontaneous two-level dynamics. In the course of a level crossing, magnons move from the ground level to the excited level driven by the Landau-Zener effect, combined with Rabi population oscillations. We demonstrate that magnon time crystals allow access to every aspect and detail of quantum-coherent interactions in a single run of the experiment. Our work opens an outlook for the detection of surface-bound Majorana fermions in the underlying superfluid system, and invites technological exploitation of coherent magnon phenomena – potentially even at room temperature.
Researchers at University of Geneva (UNIGE) and CEA have presented new protocols for Quantum Key Distribution (QKD) in a prepare-and-measure setup with an asymmetric level of trust. While the device of the sender (Alice) is […]
A team of researchers have presented the Scaled QUantum IDentifier (SQUID), an open-source framework for exploring hybrid Quantum-Classical algorithms for classification problems. The classical infrastructure is based on PyTorch and they provide a standardized design […]
Research in Quantum Machine Learning (QML) has focused primarily on variational quantum algorithms (VQAs), and several proposals to enhance supervised, unsupervised and reinforcement learning (RL) algorithms with VQAs have been put forward. Out of the […]
Bandwidth and energy are two fundamental resources needed to exchange information. In digital communication, information is encoded in a finite set of physical states known as symbols. In optics, modulated laser pulses are often used […]
Researchers at QuTech in Delft have succeeded in teleporting quantum information across a rudimentary network. This first of its kind is an important step towards a future quantum internet. This breakthrough was made possible by […]
A team of experimental physicists, at the University of Innsbruck, Austria, has implemented a universal set of computational operations on fault-tolerant quantum bits for the first time, demonstrating how an algorithm can be programmed on […]
Based on the so-called Quantum Key Distribution (QKD), researchers at TU Darmstadt have developed a new, tap-proof communication network. The new system is used to exchange symmetric keys between parties in order to encrypt messages […]
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 […]