Browse Physics

Manganese defects in zinc oxide have been identified as a class of electrically controllable qubits.

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.

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

Surface termination is used to chemically control the state of nitrogen-vacancy centers in diamond.

Dopant impurities may adversely affect the coherence of quantum bits in even highly purified silicon wafers.

Spins in a graphene quantum dot display properties surprisingly similar to those in semiconductor dots, but with potential for longer coherence times.

Nuclear spins may enable enhanced control of electron spins in quantum information devices.

Creating a practical solid-state quantum computer is seriously hard. Getting such a computer to operate at room temperature is even more challenging. Is such a quantum computer possible at all? If so, which schemes might have a chance of success?

Two theoretical studies reveal how one might achieve electric-field control of spin in semiconductors, both in an impurity-localized electron, and also with a quantum dot molecule.

Spin decoherence is a fundamental obstacle in quantum computation and spintronics. Scientists show they can increase the lifetime of a localized spin in a diamond lattice up to 100 times by polarizing the surrounding spins on the lattice.