Scientists quantify space-time nonseparability of electromagnetic pulses using quantum state tomography and calculate fidelity, concurrence, and entanglement. They propose novel concepts for measuring space-time entanglement in structured light, opening new avenues for ultrahigh-capacity communication and high-security encryption.
Archana Kamal, a physics professor at UMass Lowell, has received over $1 million in funding from the NSF and Air Force for her research on quantum information processing. Her project aims to develop self-correcting qubits using quantum reservoir engineering to address decoherence issues.
Harvard University researchers have extended the lifespan of a dipolar molecule, enabling stable qubits for quantum computing and simulation applications. The new method allows for controlled individual atom interactions, granting scientists a key resource for molecule-based quantum information processing.
Researchers have revealed conditions for robust entangled states transport in photonic topological insulators. They identify physical mechanisms and thresholds for maximizing entanglement while preserving topological protection.
The research team applied filter functions and optimal quantum control theories to detect known signals from background noise in quantum bit (qubit) sensors. They obtained analytical insight into the optimal control protocol when background noise is white, similar to classical matched filtering scheme.
A new type of bi-molecule formed from two nitric oxide molecules has been discovered, enabling researchers to study chemical reactions at low temperatures and investigate intermolecular interactions at large distances. The bi-molecule could have multiple technological applications in quantum optics and computing.
A team of researchers from University of Warsaw and China found quantum states that can only be distinguished using complex numbers, proving their importance in quantum mechanics. Complex numbers were initially considered purely mathematical but have been shown to play a fundamental role in the theory.
Researchers from QuTech at Delft University of Technology successfully demonstrated the control and coupling of four-qubit gates in a two-dimensional array of germanium-based semiconductor qubits. This achievement marks an important step toward dense, extended, two-dimensional semiconductor qubit grids.
Researchers at Chalmers University of Technology have developed a novel thermometer to measure temperatures during quantum calculations with extremely high accuracy. The breakthrough provides a benchmarking tool for quantum computing and opens up experiments in quantum thermodynamics.
Researchers have developed a method to create arbitrary dimensional quantum-like classical light directly from a laser, enabling the control of high-dimensional classically entangled states. This breakthrough opens up new possibilities for applications in quantum metrology, error correction, and optical communication.
Researchers have made a breakthrough in developing passive quantum error correction, which could enable the creation of fault-tolerant quantum computers. The technology has the potential to revolutionize various fields, including artificial intelligence, materials science, and biochemical engineering.
Researchers successfully transferred entangled qubit states through a communication cable, paving the way for future quantum networks. The team achieved entanglement amplification via the cable, using superconducting qubits, and demonstrated a system that can send entangled quantum states with minimal loss of information.
Researchers developed a new quantum theory that resolves the Gibbs paradox, a 150-year-old thermodynamic thought experiment. The study shows that even an 'ignorant' experimenter can extract work from a mixing process in a quantum system.
Researchers at Purdue University have addressed an issue that was barring the development of quantum networks. By deploying a programmable switch, they can adjust how much data goes to each user by selecting and redirecting wavelengths of light carrying different data channels. This allows for the increase in users without adding to ph...
Researchers at TU Wien have produced well-defined beams of entangled atoms using ultracold atom clouds in electromagnetic traps. The creation of controlled twin pairs has been demonstrated, allowing for new quantum experiments to be carried out with these atom pairs.
Researchers at Max Planck Institute of Quantum Optics successfully interconnected two qubits over a 60-meter distance, enabling the first prototype of a distributed quantum computer. The breakthrough opens up a new development path for distributed quantum computing, potentially leading to more powerful systems.
A team of researchers used a quantum computer to explore non-Hermitian quantum mechanics and demonstrated experimental results that are forbidden by regular Hermitian quantum theory. They also showed that entanglement can be altered in a way that is not possible under regular quantum physics.
Researchers at the University of Vienna demonstrated a new approach to reduce noise in quantum communication schemes by sending particles along multiple paths simultaneously. This method, which utilizes quantum superposition, offers improved noise reduction and has been experimentally confirmed.
A new theory of causality in quantum theory proposes cyclic causal loops, challenging classical intuitions. The study offers a novel understanding of exotic processes with indefinite causal order, which can be explained through unitary transformations.
Researchers create a new platform for valleytronics by combining ferromagnets and twisted graphene layers, enabling the manipulation of electrons' 'valley' property. This opens up a new realm of correlated twisted valleytronics with potential applications in topological quantum computing.
The researchers propose creating quantum bits by implanting magnetic atoms into a crystal lattice, enabling faster and more defined qubits. This design concept addresses the stability issue of traditional quantum computers, making them less error-prone and up to ten times faster.
The study demonstrates how to harness quantum entanglement to reduce energy fluctuations and enhance the readout of information from digital memories. This breakthrough has potential applications in large databases, next-generation computers, spectroscopy, and bio-imaging.
Researchers at the University of Innsbruck have successfully entangled two quantum bits coded on a lattice, a crucial resource for quantum computers. This achievement demonstrates key technology for future fault-tolerant quantum computers using lattice surgery.
Researchers from Aalto University have successfully entangled pairs of electrons using temperature differences in superconducting structures. This breakthrough has significant implications for quantum devices and applications, including exponential increases in computational capacity and secure information exchange.
The team from University of Science and Technology of China demonstrated the teleportation of high-dimensional states using a linear optical system, achieving extremely high-fidelity. The study's findings pave the way for rebuilding complex quantum systems remotely and constructing scalable quantum networks.
Researchers from China and Hong Kong have broken the limit of multi-parameter quantum measurement without sacrificing precision. By relating simultaneous multi-parameter estimation to Heisenberg uncertainty relations, they achieved a 13.27 dB improvement over the shot-noise limit.
Researchers describe a physical phenomenon in quantum dots and nanoscale materials using new mathematical formulas. The theories predict electrons interact through two different ways, contributing to the Kondo effect.
Researchers at USTC achieve experimental verification of distribution quantum phase estimation, surpassing classical limits in metrology. They demonstrate enhanced sensitivity in measuring multiple parameters simultaneously with high precision.
The University of Arizona team led by Zheshen Zhang is creating a prototype of an entangled sensor array to improve navigation, health care, and communication technologies. The project aims to develop affordable, compact optomechanical sensors for vehicle navigation and other applications.
Scientists at EPFL demonstrate a state of vibration that exists simultaneously at two different times, showing entanglement between light and vibration. This finding creates a bridge between daily experience and the realm of quantum mechanics, paving the way for ultrafast quantum technologies.
Researchers at Stevens Institute of Technology have developed a chip-based photon source that's 100 times more efficient than any previous device, allowing the creation of tens of millions of entangled photon pairs per second. The new source uses nanoscale microcavities to create entangled photons with virtually no waste energy.
Researchers have successfully boosted the signal power of their atomic 'tweezer clock', measuring its performance for the first time. The upgraded clock platform achieved record-breaking quantum coherence, with individual atoms vibrating in unison for over 30 seconds.
Researchers at MIT have designed an atomic clock that measures the vibrations of entangled atoms, achieving four times faster precision than current state-of-the-art clocks. This breakthrough enables scientists to detect phenomena like dark matter and gravitational waves, while also shedding light on gravity's impact on time.
Entangled photon-based mid-infrared imaging improves penetration depth in highly scattering materials, enabling non-destructive testing and analysis of ceramics and paint samples. The technique produces high-quality 2D and 3D images using a compact optical setup.
Researchers from the University of Cambridge discovered a hidden symmetry in quantum systems that allows entangled particles to remain linked despite noise. This finding could lead to the development of ultra-powerful quantum computers by preserving quantum effects in noisy environments.
Physicists propose an experiment to test if gravity is a quantum phenomenon, involving entangled diamonds in freefall. A conducting copper plate shields the Casimir effect, reducing noise and making the experiment less demanding.
The study successfully demonstrated an optimal entanglement collective measurement that reduces quantum backaction to zero in a two-qubit system under strongly coherent evolution. The experiment achieved high fidelity of 98.5% and marks a significant advancement in the field of quantum thermodynamics.
Theoretical researchers at the University of Chicago have found a way to make quantum sensors exponentially more sensitive by harnessing a unique physics phenomenon. This breakthrough could lead to improved detection and diagnosis of diseases, prediction of natural disasters, and exploration without digging.
Scientists at University of Rochester and Cornell University have developed a nanoscale node made of magnetic and semiconducting materials that can interact with other nodes using laser light. The device uses entanglement, a phenomenon in quantum mechanics, to connect quantum nodes across a remote network.
Scientists have uncovered the chemical structure behind defects in white graphene that emit single photons, paving the way for controlled fabrication and practical applications. The study reveals a direct link between carbon incorporation and quantum emission, with potential implications for quantum sensing and computing.
Researchers at Princeton University create device that excites erbium atoms using laser light, allowing control of multiple atoms without spatial information. This enables study of rich quantum mechanical behavior and entanglement in atoms at tiny distances.
Researchers at a new DOE center are developing cutting-edge quantum sensing devices to unravel the mysteries of quantum materials. The devices will allow scientists to probe materials with pairs of photons or electrons, paving the way for discovering new quantum materials and inventing more sensitive probes.
Physicists at ETH Zurich have demonstrated a new method for delivering multiple laser beams precisely to the right locations in a stable manner, allowing for delicate quantum operations on trapped atoms. The approach enables high-fidelity logic gates and scalability for large quantum computers.
Researchers aim to demonstrate ideal energy transfer in quantum systems, potentially leading to more efficient engines and quantum computers. The project uses superconducting circuits to design experiments that can be carried out within realistic quantum systems.
Bell's inequalities contrast local realism with quantum mechanics, relevant to security, cryptography, and computing applications.
A computational study reveals that infinite hydrogen chains can transform from insulators to metals, with electrons moving freely between atoms. The researchers' combined cutting-edge methods provide a new understanding of the chain's properties and its potential for custom-designing materials.
Quntao Zhuang, a University of Arizona electrical and computer engineer, has received the DARPA Young Faculty Award to improve the precision of quantum sensor networks. His research focuses on enhancing the ability of these sensors to perform in noisy environments.
Researchers at UArizona are working with a $115 million federal program to develop a quantum computer and sensors for discoveries about dark matter. The center aims to overcome qubit decoherence, enabling more powerful computing and sensing applications.
A team of scientists has created a unique prototype that can transform how we communicate online by deploying a new technique harnessing the laws of physics. The quantum network, scalable and relatively cheap, could secure people's online communication and pave the way for widespread rollout.
The Quantum Systems Accelerator will harness quantum information science for discoveries that benefit the world and accelerate commercialization. The center will co-design solutions needed to build working quantum systems outperforming today's computers.
Researchers have made breakthroughs in understanding dispersion's impact on entangled photon systems, allowing for more reliable communication networks. This discovery could enable faster data transmission rates and secure secret sharing.
Researchers at Stanford University have created nanostructures that can slow down and redirect light, allowing for new technologies such as quantum computing, virtual reality, and biosensing. These 'high-Q' resonators have demonstrated quality factors up to 2,500, enabling applications like detecting COVID-19 antigens and antibodies.
Researchers developed a novel thermometer based on quantum entanglement that can accurately measure ultra-cold temperatures in clouds of atoms, known as Fermi gases. The new method uses a probe atom to infer temperature by exploiting the unique properties of fermions at extremely low temperatures.
Researchers at Yokohama National University developed a new method to produce entangled photons compatible with quantum memories, allowing for long-distance quantum communication through optical fibers. This breakthrough could enable the creation of a quantum internet linking quantum computers.
A group of physicists has proposed a 'table-top' device that could measure gravity waves and determine if gravity is a quantum phenomenon. The device uses a tiny diamond in quantum superposition to detect gravitational waves and create an interference pattern.
A University of Arizona team advances low-density parity check codes for quantum computers, enabling fault-tolerant and ultra-fast computation. The development is crucial for solving complex equations and analyzing phenomena that classical computers can't handle.
Buckled graphene mimics colossal magnetic fields, altering electronic properties for novel quantum materials and superconductors. Researchers discover dramatic changes in material's behavior at extremely low temperatures.
The ACM SIGCOMM conference emphasizes the importance of communications technologies in maintaining daily life. The virtual event showcases research papers on various topics, including programmable switches and video applications. Keynote speakers are recognized for their contributions to data network architectures, and the conference a...
Researchers at MIT and Caltech explored the theoretical possibilities of quantum communication in blackjack, finding a slight advantage for cooperative players. In a limited number of situations with low cards left in the deck, quantum entanglement can give players an edge over classical card-counting strategies.
Researchers at Skoltech developed a quantum enhanced machine learning approach that uses quantum states as data, overcoming the 'data-readin problem'. This allows for faster calculations and better performance than classical machines in certain applications.