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Quantum Information

All articles tagged with #quantum information

Beyond Classical Bits: Building a Quantum-Input Complexity Theory
technology10 days ago

Beyond Classical Bits: Building a Quantum-Input Complexity Theory

Henry Yuen is building a fully quantum complexity theory to analyze problems whose inputs and outputs are quantum, something traditional theory can’t capture. By recasting issues through the lens of Uhlmann’s theorem, his work shows several quantum-input problems—bit commitments, black-hole decoding, quantum data compression—are actually equivalent, suggesting a unified, quantum-only framework. The project seeks to map these relationships and assess whether quantum-input problems are logically independent from classical complexity, while also sharing Yuen’s personal journey and research philosophy.

via Quanta Magazine|
#black-holes#complexity-theory#cryptography
"Scientists Achieve Clear Quantum Signals in Diamonds"
science-and-technology1 year ago

"Scientists Achieve Clear Quantum Signals in Diamonds"

Researchers at Stanford University have used advanced microscopy to link the atomic structure of diamonds to the erratic signals from quantum bits embedded within. By examining the grain boundaries in nanodiamonds, they discovered that the internal structure significantly affects photon emission properties, providing new insights for improving quantum communication and sensing technologies.

via Phys.org|
#diamond#photon-emission#quantum-information
"Breakthrough: Quantum Data Stored and Retrieved for Groundbreaking Internet Security"
science-and-technology1 year ago

"Breakthrough: Quantum Data Stored and Retrieved for Groundbreaking Internet Security"

Researchers have developed a system of atomic processing nodes that can produce, store, and retrieve quantum information, a crucial step towards creating a quantum-based network. This system involves a semiconductor quantum dot emitting single photons and a cloud of hot rubidium atoms serving as quantum memory, with a laser controlling the storage and release of photon states. While still in the prototype stage, this advancement could pave the way for stable quantum networks, addressing previous challenges in linking photon sources and processing nodes.

via ScienceAlert|
#atomic-memory#photon-emission#quantum-computing
"Advancements in Quantum Internet Connectivity and Storage"
science-and-technology1 year ago

"Advancements in Quantum Internet Connectivity and Storage"

Researchers have successfully created a crucial connection for the development of a quantum internet by producing, storing, and retrieving quantum information for the first time. This achievement is a significant step towards enabling quantum networks for distributed computing and secure communication, with potential applications in optimizing financial risk, decrypting data, designing molecules, and studying materials. The breakthrough involves interfacing a quantum dot light source with an atomic quantum memory device, allowing for the transmission of quantum data over long distances using regular optical fibers. This development, led by a collaborative effort involving researchers from Imperial College London, the University of Southampton, and the Universities of Stuttgart and Wurzburg in Germany, represents a key advancement in the field of quantum networking.

via Phys.org|
#imperial-college-london#quantum-computing#quantum-information
"Quantum Information Scrambling: Black Hole Effects in Chemical Reactions"
science-and-technology1 year ago

"Quantum Information Scrambling: Black Hole Effects in Chemical Reactions"

Researchers have discovered that basic chemistry can scramble quantum information with surprising speed and efficiency, similar to the effects of black holes. Using a mathematical tool developed decades ago, the team found that quantum states of reacting particles become scrambled, especially in confined groups at low temperatures, on a subpicosecond time scale. This discovery could potentially lead to the fine-tuning of materials to control tunneling for innovative applications in fields such as electron conduction in quantum materials.

via ScienceAlert|
#black-holes#chemistry#quantum-information
"MIT Researchers Uncover Neutrons Binding to Quantum Dots in Groundbreaking Discovery"
science1 year ago

"MIT Researchers Uncover Neutrons Binding to Quantum Dots in Groundbreaking Discovery"

MIT researchers have discovered that neutrons can be made to cling to quantum dots, forming artificial "neutronic molecules" held together by the strong force, which may lead to new tools for probing material properties at the quantum level and exploring quantum information processing devices. This unexpected finding could have applications in controlling individual neutrons for triggering reactions and developing quantum information systems, as well as in neutron imaging for materials analysis. The research was reported in the journal ACS Nano and was supported by the U.S. Office of Naval Research.

via MIT News|
#mit#neutrons#quantum-dots
"Harnessing Quantum Communication with Magnetic Disks"
science-and-technology1 year ago

"Harnessing Quantum Communication with Magnetic Disks"

Researchers at HZDR have manipulated atomic-sized qubits in silicon carbide using wave-like excitations in magnetic disks called magnons, presenting a new approach for transducing quantum information. This method could potentially enable the transduction of information within quantum networks, addressing the need for efficient communication between distinct quantum modules. The team's research demonstrates the feasibility of addressing qubits exclusively with magnons, offering insights for the development of a practical quantum computer in the future.

via Phys.org|
#hzdr#magnons#quantum-computing
"Utilizing Noise for Quantum Computing Elegantly"
quantum-computing1 year ago

"Utilizing Noise for Quantum Computing Elegantly"

Researchers at the Niels Bohr Institute have developed a method to use noise to process quantum information, increasing the performance of qubits by 700%. By continuously monitoring and adapting to environmental changes in real time, they have demonstrated a new approach to quantum computing that could lead to more powerful computers in the future. This interdisciplinary effort involves the integration of a singlet-triplet spin qubit with FPGA-powered qubit controllers and has the potential to revolutionize quantum computing by actively adjusting for environmental noise.

via Phys.org|
#noise#quantum-computing#quantum-information
"The Science of Quantum Teleportation Explained"
science-and-technology1 year ago

"The Science of Quantum Teleportation Explained"

Quantum teleportation, a real phenomenon, involves the transfer of quantum particles and information without physical movement. The process relies on entanglement, a quantum phenomenon where particles become correlated in such a way that the state of one particle is instantly connected to the state of another, regardless of the distance between them. This concept has potential applications in revolutionizing communications, computing, and our understanding of the world. John Preskill, a leading expert in quantum teleportation, discusses the intricacies of entanglement, the process of quantum teleportation, and its potential impact on technologies such as quantum computing and precision measurement.

via Quanta Magazine|
#entanglement#quantum-computing#quantum-information