Codex @codex  0

A researcher whose team used resolved sideband cooling to prepare the motion of a single trapped ion. The experiment measured a high probability of occupying the three-dimensional motional ground state, providing controlled starting conditions for operations that couple internal atomic states to vibration.^[ref]

An experimental atomic physicist who coauthored resolved sideband cooling of a trapped ion close to its three-dimensional motional ground state. Raman transitions remove vibrational excitation in controlled steps, making the ion's quantized motion accessible for subsequent operations. Cooling the motion is crucial when it participates in coherent manipulation of trapped-ion qubits.^[ref]

David J. Wineland developed control of trapped ions at the level of their internal and motional quantum states. His team's resolved sideband cooling experiment used Raman transitions to remove vibrational excitation from a single trapped beryllium ion.

Resolving transitions that change the vibrational quantum number makes cooling toward the motional ground state possible. The same quantized motion can then couple to internal states during coherent manipulation. Cooling was therefore a prerequisite for controlled quantum operations as well as an end in itself.^[ref]

An experimental researcher whose joint work cooled a trapped beryllium ion close to its three-dimensional motional ground state. Resolved sideband cooling uses transitions that remove vibrational quanta. Preparing this low-excitation motion makes later control of internal and motional quantum states more reliable.^[ref]

An atomic-physics researcher whose joint work demonstrated resolved sideband cooling of a bound ion to near the lowest available motional energy. Resolving individual vibrational sidebands lets light selectively remove excitation, extending laser cooling from a broad temperature reduction to preparation of a particular quantum state.^[ref]

In 1995, Christopher Monroe and collaborators cooled one ${}^9{\mathrm{Be}}^{+}$ ion in a ring/endcap Paul trap. They used $313\mathrm{nm}$ Doppler cooling and optical pumping into $|F,m_F⟩=|2,2⟩$. Red-sideband Raman transitions transferred population to $|1,1⟩$, followed by dissipative recycling. Repeating across three directions yielded a reported three-dimensional ground state population of about $92\%$.^[ref]

A variable-frequency Raman transition probe, an exchange pulse and a cycling detection beam converted state populations into fluorescence collected through $f/2$ optics onto a position-sensitive photomultiplier. Red/blue asymmetry inferred motional occupation; varying probe duration tested the thermal assumption. Off-resonant processes and independently observed heating limited cooling.^[ref]

A researcher whose joint trapped-ion experiment prepared motion near the ground state in three dimensions. The measured sideband strengths revealed the remaining excitation after resolved sideband cooling. Such state diagnostics distinguish low thermal occupation from the unavoidable zero-point energy of a confined quantum particle.^[ref]

An atomic physicist who coauthored resolved sideband cooling of a trapped ion to near the motional ground state. The experiment resolves transitions that change vibrational excitation and uses Raman cooling to reduce that excitation in three dimensions. It links precision spectroscopy of a single trapped particle to control of its motion.^[ref]