Browse Physics

Optical experiments let researchers fully characterize the quantum transformations corresponding to photon creation and annihilation operators.

Contact with the environment usually destroys the delicate operations of a quantum computer, but engineered dissipative processes may allow for a more robust preparation and processing of quantum states.

Two separate groups demonstrate the temporary storage and subsequent release of photons using very different quantum devices.

The combination of several quantum states that are local can yield a nonlocal state.

Researchers have applied a combination of an electric field and mechanical strain to a system of quantum dots in order to correct for asymmetries that usually prevent these semiconductor nanostructures from emitting entangled photons.

Two separate experiments have demonstrated the fast transport of trapped ions using trapping potentials that trace out the path for the ions to follow.

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

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

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.

When placed inside a 3D electromagnetic cavity, a superconducting qubit can be made potentially more useful because of its large size and long coherence time.

The anisotropic hyperfine interaction allows entanglement of two nuclear spins using microwave pulses.

The coupling between nitrogen vacancy centers can be dramatically improved through the use of electromagnetic driving fields.

Combining operations with one and two spin qubits may lead to superior quantum computers.

Techniques for using a quantum computer to simulate another quantum system will work even when the modeled system is not isolated from its environment.

Researchers demonstrate a robust, high-fidelity, broadband quantum memory that could be used to realize a long-distance quantum repeater for secure communication.

Rapid frequency variations in the photons generated by a quantum dot pose difficulties for practical applications of new quantum dot materials.

Can quantum theory be derived from more fundamental principles?

Demonstration of one-shot measurement of a single spin on a silicon quantum dot brings the prospect of quantum information processing one step closer.

Entanglement, a crucial resource in quantum information theory, can also improve communication over a classical channel.

Extraction of work from a heat bath using the Szilard engine depends crucially on the statistics of indistinguishable particles.