(a) The experimentally retrieved (upper row) and theoretically predicted (lower row) density matrices of two selected quantum states. (b) Theoretically (left panel) and experimentally retrieved (right panel) probability-of-detection matrix. Credit:…
Category: Quantum Physics
Quantum theory prevails in Leggett-Garg inequality test
A neutron beam (green) is split into two parts, which are then rejoined. Every single neutron travels along both paths at the same time. Credit: Vienna University of Technology Is…
The first exponential quantum advantage for a natural streaming problem
Theoretical computer scientists John Kallaugher, left, and Ojas Parekh find tasks in which quantum computers outperform normal computers, a concept called quantum advantage, at Sandia National Laboratories. Credit: Craig Fritz…
A new method to control quantum bound states in superconducting device
A schematic of a bilayer graphene Josephson junction device with a tunneling electrode. Credit: POSTECH Researchers have successfully controlled the quantum mechanical properties of Andreev bound states in bilayer graphene-based…
New research shows importance of precise topography in solid neon qubits
A diagram of an electron-on-solid-neon quantum bit. Credit: Wei Guo Quantum computers have the potential to be revolutionary tools for their ability to perform calculations that would take classical computers…
Foregoing quantum chaos to achieve high-fidelity quantum state transfer
Quantum state transfer (QST) performed in a 6×6 qubit lattice. Credit: Liang Xiang et al. 10.1038/s41467-024-48791-3. An international team of scientists from China and the U.S. has developed a scalable…
Quantum effects forbid the formation of black holes from high concentrations of intense light, say physicists
Credit: NASA For the last seven decades, astrophysicists have theorized the existence of “kugelblitze,” black holes caused by extremely high concentrations of light. These special black holes, they speculated, might…
