Entangled state fusion with Rydberg atoms

Neutral atoms are entangled in hyperfine states via Rydberg blockade

Detecting photons with Rydberg atoms

Unlike all other quantum technology platforms, photonics encodes quantum information without noise at room temperature, without the need for high vacuum, pumping / cooling, or magnetic / electrical shielding. Frustratingly, these advantages must be sacrificed when high-efficiency photon counting is required, as >95% photo-detection efficiency is only available via superconducting photo-detector...

Comment on testing Bell’s inequality with Rydberg atoms entangled through cavity photons

Rydberg atoms traversing a micromaser cavity one after the other can emerge in correlated states, and according to standard Copenhagen quantum mechanics this may lead to a violation of Bell’s inequality, that is, to a Bell sum S>2. S is here calculated in various ideal physical situations including those with (1) different initial states of the atoms, (2) different free adjustable parameters, b...

Quantum information with Rydberg atoms

Rydberg atoms with principal quantum number n 1 have exaggerated atomic properties including dipole-dipole interactions that scale as n4 and radiative lifetimes that scale as n3. It was proposed a decade ago to take advantage of these properties to implement quantum gates between neutral atom qubits. The availability of a strong long-range interaction that can be coherently turned on and off is...

Half-cycle-pulse-train induced state redistribution of Rydberg atoms

Population transfer between low-lying Rydberg states independent of the initial state is realized using a train of half-cycle pulses with pulse durations much shorter than the classical orbital period. We demonstrate experimentally the population transfer from initial states around n = 50 with 10% of the population de-excited down to n < 40 as well as up to the continuum. This is a demonstratio...