Measurement of line widths and permanent electric dipole moment change of the Ce 4f-5d transition in Y_2SiO_5 for a qubit readout scheme in rare-earth ion based quantum computing

Abstract

In this work the inhomogeneous (zero-phonon line) and homogeneous line widths, and one projection of the permanent electric dipole moment change for the Ce 4f-5d transition in Y_2SiO_5 were measured in order to investigate the possibility for using Ce as a sensor to detect the hyperfine state of a spatially close-lying Pr or Eu ion. The experiments were carried out on Ce doped or Ce-Pr co-doped single Y_2SiO_5 crystals. The homogeneous line width was measured to be about 3 MHz, which is essentially limited by the excited state lifetime. Based on the line width measurements, the oscillator strength, absorption cross section and saturation intensity were calculated to be about 9*10^-7, 5*10^-19 m^2 and 1*10^7 W/m^2, respectively. One projection of the difference in permanent dipole moment, Delt_miu_Ce, between the ground and excited states of the Ce ion was measured as 6.3 * 10^-30 C*m, which is about 26 times as large as that of Pr ions. The measurements done on Ce ions indicate that the Ce ion is a promising candidate to be used as a probe to read out a single qubit ion state for the quantum computing using rare-earth ions.

9 figures, 8 pages

References in corpus (5)

• Quantum Computing
• Quantum Computing with NMR
• Heralded quantum entanglement between two crystals
• Scalable designs for quantum computing with rare-earth-ion-doped crystals
• Experimental quantum state tomography of a solid state qubit

Cited by in corpus (8)

• Coherent properties of single rare-earth spin qubits
• Mapping spin coherence of a single rare-earth ion in a crystal onto a single photon polarization state
• Sensing individual nuclear spins with a single rare-earth electron spin
• High fidelity readout scheme for rare-earth solid state quantum computing
• Quantum processing with ensembles of rare earth ions in a stoichiometric crystal
• Optical coherence properties of Kramers' rare-earth ions at the nanoscale for quantum applications
• Rare Earth Ions Doped Mixed Crystals for Fast Quantum Computers with Optical Frequency Qubits
• High resolution transient and permanent spectral hole burning in Ce${}^{3+}$:Y${}_2$SiO${}_5$ at liquid helium temperatures