Browse Physics

A demonstration of photon-pair generation from visible to telecom wavelengths may speed the development of quantum networks.

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

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

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

Vibrations of the atoms in a molecule are used to implement a Fourier transform orders of magnitude faster than possible with devices based on conventional electronics.

A trick for modulating optical frequency combs will enable more flexible control over trapped-ion qubits.

An entangled state of six photons could potentially carry quantum information over large distances and between different reference frames.

This design of atomic quantum memory tells us when a pulse of light has been successfully stored and then proceeds to retrieve it without significantly affecting its polarization. The exquisite operation provides a new capability for quantum information networks.

A proposal for obtaining optical resolution better than the classical limit by means of spatially entangled quantum states of light opens a new frontier in the fields of quantum optical imaging, metrology, and sensing.

Loading cold atoms into a hollow-core optical fiber enables all-optical switching with just several hundred photons.

Preparing a harmonic oscillator in a state with a well-defined energy is a tricky business. With the new tools provided by cavity and circuit quantum electrodynamics it is now possible to make these pure quantum states and watch how they evolve in time.

Laser beams made up of millions of sharply defined and coherently locked optical frequencies, called optical frequency combs, may provide a way to implement a powerful quantum computer.