204 citations · 642 across the 9 of their papers we have counts for
9 papers
A Fully Fiber-Integrated Ion Trap for Portable Optical Atomic Clocks
Xavier Fernandez-Gonzalvo, Matthias Keller
We present a novel, single-ion trap with integrated optical fibers directly embedded within the trap structure to deliver laser light as well as collect the ion's fluorescence. Thi…
Cavity enhanced Raman heterodyne spectroscopy in Er:YSO for microwave to optical signal conversion
Xavier Fernandez-Gonzalvo, Sebastian P. Horvath, Yu-Hui Chen +1
The efficiency of the frequency conversion process at the heart of Raman heterodyne spectroscopy was improved by nearly four orders of magnitude by resonant enhancement of both the…
Hyperfine interactions of ions in : electron paramagnetic resonance in a tunable microwave cavity
Yu-Hui Chen, Xavier Fernandez-Gonzalvo, Sebastian P. Horvath +2
The hyperfine structure of the ground state of erbium doped yttrium orthosilicate is analyzed with the use of electron paramagnetic resonance experiments in a tunable microwave res…
Coupling erbium spins to a three-dimensional superconducting cavity at zero magnetic field
Yu-Hui Chen, Xavier Fernandez-Gonzalvo, Jevon J. Longdell
We experimentally demonstrate the coupling at zero magnetic field of an isotopically pure erbium doped yttrium orthosilicate crystal (Er:YSO) to a three-dimensional superco…
Coherent frequency up-conversion of microwaves to the optical telecommunications band in an Er:YSO crystal
Xavier Fernandez-Gonzalvo, Yu-Hui Chen, Chunming Yin +2
The ability to convert quantum states from microwave photons to optical photons is important for hybrid system approaches to quantum information processing. In this paper we report…
A Waveguide Frequency Converter Connecting Rubidium Based Quantum Memories to the Telecom C-Band
Boris Albrecht, Pau Farrera, Xavier Fernandez-Gonzalvo +2
The ability to coherently convert the frequency and temporal waveform of single and entangled photons will be crucial to interconnect the various elements of future quantum informa…
Quantum frequency conversion of quantum memory compatible photons to telecommunication wavelengths
Xavier Fernandez-Gonzalvo, Giacomo Corrielli, Boris Albrecht +3
We report an experiment demonstrating quantum frequency conversion of weak light pulses compatible with atomic quantum memories to telecommunication wavelengths. We use a PPLN nonl…
Simulating Dirac fermions with Abelian and non-Abelian gauge fields in optical lattices
Emilio Alba, Xavier Fernandez-Gonzalvo, Jordi Mur-Petit +2
In this work we present an optical lattice setup to realize a full Dirac Hamiltonian in 2+1 dimensions. We show how all possible external potentials coupled to the Dirac field can…
Seeing topological order in time-of-flight measurements
E. Alba, X. Fernandez-Gonzalvo, J. Mur-Petit +2
In this work we provide a general methodology to directly measure topological order in cold atom systems. As an application we propose the realisation of a characteristic topologic…