162 citations · 408 across the 7 of their papers we have counts for
7 papers
Memory coherence of a sympathetically cooled trapped-ion qubit
J. P. Home, M. J. McDonnell, D. J. Szwer +4
We demonstrate sympathetic cooling of a 43Ca+ trapped-ion "memory" qubit by a 40Ca+ "coolant" ion near the ground state of both axial motional modes, whilst maintaining coherence o…
A long-lived memory qubit on a low-decoherence quantum bus
D. M. Lucas, B. C. Keitch, J. P. Home +5
We demonstrate long-lived coherence in internal hyperfine states of a single \Ca{43} trapped-ion qubit $[T_2=1.2(2)\s]$, and in external motional states of a single \Ca{40} trapped…
Long-lived mesoscopic entanglement outside the Lamb-Dicke regime
M. J. McDonnell, J. P. Home, D. M. Lucas +7
We create entangled states of the spin and motion of a single Ca ion in a linear ion trap. The motional part consists of coherent states of large separation and long coh…
Deterministic entanglement and tomography of ion spin qubits
J. P. Home, M. J. McDonnell, D. M. Lucas +7
We have implemented a universal quantum logic gate between qubits stored in the spin state of a pair of trapped calcium 40 ions. An initial product state was driven to a maximally…
Laser linewidth effects in quantum state discrimination by EIT
M. J. McDonnell, D. N. Stacey, A. M. Steane
We discuss the use of electromagnetically modified absorption to achieve selective excitation in atoms: that is, the laser excitation of one transition while avoiding simultaneousl…
Isotope-selective photo-ionization for calcium ion trapping
D. M. Lucas, A. Ramos, J. P. Home +6
We present studies of resonance-enhanced photo-ionization for isotope-selective loading of Ca+ into a Paul trap. The 4s^2 ^1S_0 <-> 4s4p ^1P_1 transition of neutral calcium is driv…