Browse Physics

With the right algorithm, quantum computers could tackle ubiquitous problems such as least-squares fitting of large data sets.

Quantum computing could be used to efficiently rank internet sites, according to a theoretical proposal.

The oscillations of a carbon nanotube can strongly affect the spin of an electron trapped on the tube, and the tube can also be affected by the spin, according to theory.

A generalization of one of the most famous experiments in quantum foundations provides a powerful new unifying concept.

New techniques for storing and retrieving polarized photons improve the quantum memory capabilities of rare-earth-doped crystals.

Statistical mechanical models are the key to understanding the performance of error correction in topological quantum computers.

Testing hypotheses about the validity of different dynamical models can now be done on a much wider range of quantum systems.

A semiconductor chip that generates entangled photon pairs is friendlier to integration with other chip-based quantum components than any previous device.

Researchers propose a way to transfer quantum information between ions and electronic circuits, opening up new options for quantum computation.

Although perfect copies of a quantum state are prohibited, theory shows that recombining all imperfect clones recovers the original quantum state.

Quantum interference of pairs of photons emitted by nitrogen-vacancy centers in diamond paves the way for entanglement of distant qubits.

Semiconductor quantum dots connected by floating metallic gates point the way to a scalable quantum computer.

States consisting of three qubits provide a way of understanding how quantum entanglement relates to nonlocality.

Simulations of a key quantum algorithm reveal the time required for executing a sample computation and point to possible methods for optimization.

A device that efficiently transfers single electrons from one grid point to another on the surface of liquid helium could provide a scalable way to make arrays of electron qubits.

Combining two noisy information channels can yield noiseless information transmission.

Precisely prepared photon states can probe quantum statistical phenomena and generate intriguing forms of quantum entanglement.

Spin-dependent forces create quantum superpositions of different structures of a trapped ion crystal.