107 citations · 541 across the 22 of their papers we have counts for
13 papers · 1 filter
Pulsed multireservoir engineering for a trapped ion with applications to state synthesis and quantum Otto cycles
Wallace S. Teixeira, Matthias K. Keller, Fernando L. Semião
Conducting an open quantum system towards a desired steady state through reservoir engineering is a remarkable task that takes dissipation and decoherence as tools rather than impe…
Enhanced ion-cavity coupling through cavity cooling in the strong coupling regime
Costas Christoforou, Corentin Pignot, Ezra Kassa +2
Incorporating optical cavities in ion traps is becoming increasingly important in the development of photonic quantum networks. However, the presence of the cavity can hamper effic…
Improving the Indistinguishability of Single Photons from an Ion-Cavity System
Thomas Walker, Samir Vartabi Kashanian, Travers Ward +1
We investigate schemes for generating indistinguishable single photons, a key feature of quantum networks, from a trapped ion coupled to an optical cavity. Through selection of the…
Strong coupling of a single ion to an optical cavity
Hiroki Takahashi, Ezra Kassa, Costas Christoforou +1
Strong coupling between an atom and an electromagnetic resonator is an important condition in cavity quantum electrodynamics (QED). While strong coupling in various physical system…
Precise positioning of an ion in an integrated Paul trap-cavity system using radiofrequency signals
Ezra Kassa, Hiroki Takahashi, Costas Christoforou +1
We report a novel miniature Paul ion trap design with an integrated optical fibre cavity which can serve as a building block for a fibre-linked quantum network. In such cavity quan…
Long-distance single photon transmission from a trapped ion via quantum frequency conversion
Thomas Walker, Koichiro Miyanishi, Rikizo Ikuta +7
Trapped atomic ions are ideal single photon emitters with long lived internal states which can be entangled with emitted photons. Coupling the ion to an optical cavity enables effi…
Cavity-induced anti-correlated photon emission rates of a single ion
Hiroki Takahashi, Ezra Kassa, Costas Christoforou +1
We report on the alteration of photon emission properties of a single trapped ion coupled to a high finesse optical fiber cavity. We show that the vacuum field of the cavity can si…
Fiber cavities with integrated mode matching optics
Gurpreet Kaur Gulati, Hiroki Takahashi, Nina Podoliak +2
In fiber based Fabry-Pérot Cavities (FFPCs), limited spatial mode matching between the cavity mode and input/output modes has been the main hindrance for many applications. We have…
Mølmer-Sørensen entangling gate for cavity QED systems
Hiroki Takahashi, Pedro Nevado Serrano, Matthias Keller
The Mølmer-Sørensen gate is a state-of-the-art entangling gate in the ion trap quantum computing where the gate fidelity can exceed 99\%. Here we propose an analogous implementatio…
Comparative numerical studies of ion traps with integrated optical cavities
Nina Podoliak, Hiroki Takahashi, Matthias Keller +1
We study a range of radio-frequency ion trap geometries and investigate the effect of integrating dielectric cavity mirrors on their trapping potential. We aim to identify ion trap…
Optimised multi-ion cavity coupling
Stephen Begley, Markus Vogt, Gurpreet Kaur Gulati +2
Recent technological advances in cavity quantum electrodynamics (CQED) are paving the way to utilise multiple quantum emitters confined in a single optical cavity. In such systems…
Fiber-coupled single ion as an efficient quantum light source
Alex Wilson, Hiroki Takahashi, Andrew Riley-Watson +8
We have realized a compact system to efficiently couple the fluorescent light emitted by a single trapped ion to two opposing optical fibers. The fibers are tightly integrated in t…
Molecular heat pump for rotational states
C. Lazarou, M. Keller, B. M. Garraway
In this work we investigate the theory for three different uni-directional population transfer schemes in trapped multilevel systems which can be utilized to cool molecular ions. T…