Zhe Xian Koong
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View article: Optical and Magnetic Response by Design in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Ga</mml:mi><mml:mi>As</mml:mi></mml:mrow></mml:math> Quantum Dots
Optical and Magnetic Response by Design in Quantum Dots Open
Quantum networking technologies use spin qubits and their interface to single photons as core components of a network node. This necessitates the ability to co-design the magnetic- and optical-dipole response of a quantum system—a capabili…
View article: Photon-Interfaced Ten-Qubit Register of Trapped Ions
Photon-Interfaced Ten-Qubit Register of Trapped Ions Open
Establishing networks of quantum processors offers a path to scalable quantum computing and applications in communication and sensing. This requires first developing efficient interfaces between photons and multiqubit registers. In this Le…
View article: Optical and magnetic response by design in GaAs quantum dots
Optical and magnetic response by design in GaAs quantum dots Open
Quantum networking technologies use spin qubits and their interface to single photons as core components of a network node. This necessitates the ability to co-design the magnetic- and optical-dipole response of a quantum system. These pro…
View article: Experimental distributed quantum sensing in a noisy environment
Experimental distributed quantum sensing in a noisy environment Open
The precision advantages offered by harnessing the quantum states of sensors can be readily compromised by noise. However, when the noise has a different spatial function than the signal of interest, recent theoretical work shows how the a…
View article: A photon-interfaced ten qubit quantum network node
A photon-interfaced ten qubit quantum network node Open
We entangle each individual matter-qubit in a register of ten to a separate travelling photon. The qubits are encoded in a string of cotrapped atomic ions. By switching the trap confinement, ions are brought one at a time into the waist of…
View article: Single-emitter quantum key distribution over 175 km of fibre with optimised finite key rates
Single-emitter quantum key distribution over 175 km of fibre with optimised finite key rates Open
View article: Single-emitter quantum key distribution over 175 km of fiber with optimised finite key rates
Single-emitter quantum key distribution over 175 km of fiber with optimised finite key rates Open
Quantum key distribution with solid-state single-photon emitters is gaining traction due to their rapidly improving performance and compatibility with future quantum network architectures. In this work, we perform fibre-based quantum key d…
View article: Signatures of cooperative emission in photon coincidence: Superradiance versus measurement-induced cooperativity
Signatures of cooperative emission in photon coincidence: Superradiance versus measurement-induced cooperativity Open
Indistinguishable quantum emitters confined to length scales smaller than the wavelength of the light become superradiant. Compared to uncorrelated and distinguishable emitters, superradiance results in qualitative modifications of optical…
View article: Coherence in cooperative photon emission from indistinguishable quantum emitters
Coherence in cooperative photon emission from indistinguishable quantum emitters Open
Photon-mediated interactions between atoms can arise via coupling to a common electromagnetic mode or by quantum interference. Here, we probe the role of coherence in cooperative emission arising from two distant but indistinguishable soli…
View article: Coherent Dynamics in Quantum Emitters under Dichromatic Excitation
Coherent Dynamics in Quantum Emitters under Dichromatic Excitation Open
We characterize the coherent dynamics of a two-level quantum emitter driven by a pair of symmetrically detuned phase-locked pulses. The promise of dichromatic excitation is to spectrally isolate the excitation laser from the quantum emissi…
View article: Highly energy-tunable quantum light from moiré-trapped excitons
Highly energy-tunable quantum light from moiré-trapped excitons Open
Photon antibunching, a hallmark of quantum light, is observed from moiré-trapped interlayer excitons in a 2D heterobilayer.
View article: Highly tunable quantum light from moiré trapped excitons
Highly tunable quantum light from moiré trapped excitons Open
Photon antibunching, a hallmark of quantum light, has been observed in the correlations of light from isolated atomic and atomic-like solid-state systems. Two-dimensional semiconductor heterostructures offer a unique method to create a qua…
View article: Fundamental Limits to Coherent Photon Generation with Solid-State Atomlike Transitions
Fundamental Limits to Coherent Photon Generation with Solid-State Atomlike Transitions Open
Coherent generation of indistinguishable single photons is crucial for many quantum communication and processing protocols. Solid-state realizations of two-level atomic transitions or three-level spin-Λ systems offer significant advantages…