Browse Physics

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.

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.

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.

Experiments with classical light sources show that tests of Bell’s inequalities can be manipulated to yield counterfeit quantum answers.

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.

Theory shows that three-level atoms can overcome intrinsic problems with two-level systems in controlling the flow of photons.

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

A Fabry-Pérot cavity exhibits the same behavior when an atom replaces a mirror.

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

A theoretical proposal shows how pure quantum states can be turned into long-lasting states that are protected from decoherence.

By applying environmental noise to a photon detector, researchers have identified the boundary where the device switches from a quantum device to a classical one.

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.