Quantum interference of photon pairs from two remote trapped atomic ions

By Peter Maunz, D. Moehring, S. Olmschenk, K. Younge, Dzmitry N. Matsukevich, Christopher R. Monroe. 2006

249 citations recorded by the source corpus.

Trapped atomic ions are among the most attractive implementations of quantum bits for applications in quantum-information processing, owing to their long trapping lifetimes and long coherence times. Although nearby trapped ions can be entangled through their Coulomb-coupled motion1,2,3,4,5,6, it seems more natural to entangle remotely located ions through a coupling mediated by photons, eliminating the need to control the ion motion. A promising way to entangle ions via a photonic channel is to interfere two photons emitted from the ions and then detect appropriate photon coincidence events7,8,9. Here, we report the pivotal element of this scheme in the observation of quantum interference between pairs of single photons emitted from two atomic ions residing in independent traps.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/95c5107deb9554d6d57ea769c2d0932b74d43d3b

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Citations in the corpus

Quantum computing with trapped ions (2008, background): “Recently,ions in separate traps have been also entangled using ionphoton entanglement by the Ann-Arbor group (Blinov et al., 2004; Maunz et al., 2007; Moehring et al., 2007; Matsukevich et al., 2008).”
Colloquium: Quantum networks with trapped ions (2010, methodology): “…1987; Shih and Alley, 1988; Kaltenbaek et al., 2006͒, quantum dots ͑Santori et al., 2002͒, single atoms ͑Legero et al., 2004; Beugnon et al., 2006͒, atomic ensembles ͑Felinto et al., 2006; Thompson et al., 2006; Chaneliere et al., 2007͒, and trapped ions ͑Maunz et al., 2007; Gerber et al., 2009͒.”
Circuit quantum electrodynamics (2010, methodology): “Instead of creating the GHZ state by multiqubit gates, we employ the idea of entanglement generation by measurement—an elegant way to create entangled states of two or more qubits without the need for high-fidelity two-qubit gates [76–80].”
A quantum network of clocks (2013, background): “The entangled states of up to 14 ions has already been demonstrated [24] as was the entanglement of remote ions [40].”
Entanglement of single-atom quantum bits at a distance (2007, unknown): “To ensure that at most a single photon is emitted from each ion following an excitation pulse, it is important to use a laser pulse that is much shorter than the lifetime of the excited state 23 .”
Metrology of single-photon sources and detectors: a review (2014, background): “A necessary requirement for this work is that the photons from separate sources exhibit quantum interference.(39) Cavity quantum electrodynamics offers the route to a deterministic source; the ion is confined in an optical cavity which is near resonant and strongly coupled to one of two transitions ”
Quantum repeaters based on atomic ensembles and linear optics (2009, background): “Single photons have also been generated by trapped single ions (Dubin et al., 2007; Keller et al., 2004; Maunz et al., 2007).”
Micius quantum experiments in space (2022, methodology): “Entanglement swapping has been used as a ubiquitous tool to entangle distant qubits such as those in trapped ions (Maunz et al., 2007), cold atomic ensembles (Yuan et al.”
Two-photon interference of the emission from electrically tunable remote quantum dots (2009, background): “161" language="eng" relation="no" origsrc="yes"> Quantum effects between photons from remote sources have been observed with ion”
Frequency-domain Hong–Ou–Mandel interference (2016, background): “So far many elemental properties of quantum physics and information[2] have been discovered through the concatenated HOM effects, which has been demonstrated in photons [1, 3, 4, 5, 6, 7, 8] and recently in plasmons[9, 10], atoms[11] and phonons[12].”