Browse Physics

In transistor circuits, preventing logical errors with physical fault tolerance is more efficient than correcting errors with a fault-tolerant architecture.

Quick detection of photogenerated electrons in a quantum dot may lead to a better method to transfer quantum information between optical and electrical media.

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

Separate groups have come up with designs on how to transfer quantum information between distinct computer architectures.

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

Nonclassical light may provide a more efficient readout mechanism than its classical counterpart in the regime of few photons.

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

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

Photons stored in spatially separated superconducting resonators have now been entangled in a way that might be scalable to larger quantum networks.

Time travel isn’t forbidden by physical laws. A new consistency condition for time traveling quantum states eliminates any possibility of so-called grandfather paradoxes, in which a time-traveler kills her own ancestor.

Strain can be used to shift the resonant frequency of electron spin to the point where quantum processing starts looking feasible.

A new plasmonic route to long-distance entanglement is proposed.

By relaxing certain assumptions, it is possible to describe quantum correlations as both local and real.

Elastic scattering may be a larger source of qubit error than previously thought.

A new optical component for integrated photonic circuits could prove helpful for applications that store and transmit the information contained in linearly polarized light.

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

A theoretical paper suggests that quantum entanglement between macroscopic objects could be accomplished at temperatures much higher than previously thought.

Networks of photonic devices with broken time-reversal symmetry may provide a way to create a quantum simulator to study strongly correlated systems.

Ensembles of dilute spin impurities in condensed matter systems can be accessed using microelectronic circuits and therefore may offer a way for long-term storage and enhanced processing of quantum information.

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