Charles S. Adams
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View article: Simultaneous optical and multi-band terahertz imaging using an atomic quantum sensor
Simultaneous optical and multi-band terahertz imaging using an atomic quantum sensor Open
We demonstrate simultaneous imaging at 0.549 THz and 1.012 THz with an optical overlay using a two-species atomic-vapour-based technique. The atomic vapour, comprising laser-pumped rubidium and caesium atoms contained within the same cell,…
View article: Single photonic qutrit in a collective Rydberg polariton
Single photonic qutrit in a collective Rydberg polariton Open
Qutrit with highly efficient algorithms and security is imperative in quantum information processing. Here, we demonstrate for the first time the coherent creation, control, and readout of a single photonic qutrit in a cold Rydberg ensembl…
View article: Continuous-time ultrahigh-frequency sensing using cold Rydberg atoms
Continuous-time ultrahigh-frequency sensing using cold Rydberg atoms Open
We present a technique for detecting ultrahigh-frequency (UHF) radio fields using a three-photon Rydberg excitation scheme in a continuously laser-cooled sample of
View article: Temporally-multiplexed dual-frequency terahertz imaging at kilohertz frame rates
Temporally-multiplexed dual-frequency terahertz imaging at kilohertz frame rates Open
We present a temporally-multiplexed dual-colour terahertz (THz) imaging technique using THz-to-optical conversion in atomic vapour. By rapidly alternating the pump laser frequency, we sequentially excite two atomic states, each absorbing a…
View article: Unraveling the structures in the van der Waals interactions of alkali-metal Rydberg atoms
Unraveling the structures in the van der Waals interactions of alkali-metal Rydberg atoms Open
Rydberg atoms are used in a wide range of applications due to their peculiar properties like strong dipolar and van der Waals interactions. The choice of Rydberg state has a huge impact on the strength and angular dependence of the interac…
View article: Determination of quantum defects and core polarizability of atomic cesium via terahertz and radio-frequency spectroscopy in thermal vapor
Determination of quantum defects and core polarizability of atomic cesium via terahertz and radio-frequency spectroscopy in thermal vapor Open
We present new measurements of quantum defects and core polarizabilities in cesium (Cs
View article: Direction switchable single-photon emitter using a Rydberg polariton
Direction switchable single-photon emitter using a Rydberg polariton Open
All-optical redirection or routing of single photons is essential for quantum networks. Although studied in various systems both in theory and experiment, the redirection of single photons with many output ports, compatible with large-scal…
View article: Rydberg atom van der Waals interaction, C6 calulations - angular channel precalculated values
Rydberg atom van der Waals interaction, C6 calulations - angular channel precalculated values Open
Precalculated angular channel values to compute the C6 interaction coefficients for vdW interaction between Rydberg atoms. The data can be utilised via the Alkali Rydberg Calculator (ARC), usage examples can be found on ARCs GitHub page, o…
View article: Suppression of Motional Dephasing Using State Mapping
Suppression of Motional Dephasing Using State Mapping Open
Rydberg-mediated quantum optics is a useful route toward deterministic quantum information processing based on single photons and quantum networks but is bottlenecked by the fast motional dephasing of Rydberg atoms. Here, we propose and ex…
View article: Temporally-multiplexed Dual-frequency Terahertz Imaging at Kilohertz Frame Rates
Temporally-multiplexed Dual-frequency Terahertz Imaging at Kilohertz Frame Rates Open
View article: Early Warning Signals of the Tipping Point in Strongly Interacting Rydberg Atoms
Early Warning Signals of the Tipping Point in Strongly Interacting Rydberg Atoms Open
The identification of tipping points is essential for the prediction of collapses or other sudden changes in complex systems. Applications include studies of ecology, thermodynamics, climatology, and epidemiology. However, detecting early …
View article: Single photonic qutrit in a collective Rydberg polariton
Single photonic qutrit in a collective Rydberg polariton Open
We report on the coherent creation, control and read-out of a single photonic qutrit in a Rydberg ensemble. In each measurement, an optical photon is stored as a Rydberg polariton through electromagnetically induced transparency. Employing…
View article: Epidemic spreading and herd immunity in a driven non-equilibrium system of strongly-interacting atoms
Epidemic spreading and herd immunity in a driven non-equilibrium system of strongly-interacting atoms Open
It is increasingly important to understand the spatial dynamics of epidemics. While there are numerous mathematical models of epidemics, there is a scarcity of physical systems with sufficiently well-controlled parameters to allow quantita…
View article: Many-body nonequilibrium dynamics in a self-induced Floquet system
Many-body nonequilibrium dynamics in a self-induced Floquet system Open
Floquet systems are periodically driven systems. In this framework, the system Hamiltonian and associated spectra of interest are modified, giving rise to new quantum phases of matter and nonequilibrium dynamics without static counterparts…
View article: Suppression of motional dephasing using state mapping
Suppression of motional dephasing using state mapping Open
Rydberg-mediated quantum optics is a useful route toward deterministic quantum information processing based on single photons and quantum networks, but is bottlenecked by the fast motional dephasing of Rydberg atoms. Here, we propose and e…
View article: Quantum Lotka-Volterra dynamics
Quantum Lotka-Volterra dynamics Open
Physical systems that display competitive non-linear dynamics have played a key role in the development of mathematical models of Nature. Important examples include predator-prey models in ecology, biology, consumer-resource models in econ…
View article: Simultaneous multiband radio-frequency detection using high-orbital-angular-momentum states in a Rydberg-atom receiver
Simultaneous multiband radio-frequency detection using high-orbital-angular-momentum states in a Rydberg-atom receiver Open
We demonstrate simultaneous detection of radio-frequency (rf) fields ranging from the very high-frequency (VHF) band (128 MHz) to terahertz frequencies (0.61 THz) using high-orbital-angular-momentum (ℓ) states in a caesium Rydberg-atom rec…
View article: Early warning signals of the tipping point in strongly interacting Rydberg atoms
Early warning signals of the tipping point in strongly interacting Rydberg atoms Open
The identification of tipping points is essential for prediction of collapses or other sudden changes in complex systems. Applications include studies of ecology, thermodynamics, climatology, and epidemiology. However, detecting early sign…
View article: Giant microwave–optical Kerr nonlinearity via Rydberg excitons in cuprous oxide
Giant microwave–optical Kerr nonlinearity via Rydberg excitons in cuprous oxide Open
Microwave–optical conversion is key to future networks of quantum devices, such as those based on superconducting technology. Conversion at the single quantum level requires strong nonlinearity, high bandwidth, and compatibility with a mil…
View article: Ergodicity breaking from Rydberg clusters in a driven-dissipative many-body system
Ergodicity breaking from Rydberg clusters in a driven-dissipative many-body system Open
It is challenging to probe ergodicity breaking trends of a quantum many-body system when dissipation inevitably damages quantum coherence originated from coherent coupling and dispersive two-body interactions. Rydberg atoms provide a test …
View article: Introduction
Introduction Open
View article: An Interactive Guide to Quantum Optics
An Interactive Guide to Quantum Optics Open
Embracing the enhanced features of an ebook, the authors provide a primer on quantum optics for students and those wanting an introduction to the topic. Whereas standard texts employ complex mathematics and static images, the authors use i…
View article: Giant microwave-optical Kerr nonlinearity via Rydberg excitons in cuprous oxide
Giant microwave-optical Kerr nonlinearity via Rydberg excitons in cuprous oxide Open
Microwave-optical conversion is key to future networks of quantum devices, such as those based on superconducting technology. Conversion at the single quantum level requires strong nonlinearity, high bandwidth, and compatibility with a mil…
View article: Simultaneous multi-band radio-frequency detection using high-orbital-angular-momentum states in a Rydberg-atom receiver
Simultaneous multi-band radio-frequency detection using high-orbital-angular-momentum states in a Rydberg-atom receiver Open
We demonstrate simultaneous detection of radio-frequency (RF) fields ranging from the very high-frequency (VHF) band (128 MHz) to terahertz frequencies (0.61 THz) using a caesium Rydberg-atom receiver. The RF fields are concurrently applie…
View article: Emergence of Synchronization in a Driven-Dissipative Hot Rydberg Vapor
Emergence of Synchronization in a Driven-Dissipative Hot Rydberg Vapor Open
We observe synchronization in a thermal (35-60 °C) atomic (Rb) ensemble driven to a highly excited Rydberg state (principle quantum number n ranging from 43 to 79). Synchronization in this system is unexpected due to the atomic motion; how…
View article: Detection of 3–300 MHz electric fields using Floquet sideband gaps by “Rabi matching” dressed Rydberg atoms
Detection of 3–300 MHz electric fields using Floquet sideband gaps by “Rabi matching” dressed Rydberg atoms Open
Radio frequencies in high-frequency (HF) and very high-frequency (VHF) bands (3–300 MHz) are challenging for Rydberg atom-based detection schemes, as resonant detection requires exciting atoms to extremely high energy states. We demonstrat…
View article: Observation of Rydberg Blockade Due to the Charge-Dipole Interaction between an Atom and a Polar Molecule
Observation of Rydberg Blockade Due to the Charge-Dipole Interaction between an Atom and a Polar Molecule Open
We demonstrate Rydberg blockade due to the charge-dipole interaction between a single Rb atom and a
\nsingle RbCs molecule confined in optical tweezers. The molecule is formed by magnetoassociation of a
\nRb þ Cs atom pair and subsequently…
View article: Emergence of synchronisation in a driven-dissipative hot Rydberg vapor
Emergence of synchronisation in a driven-dissipative hot Rydberg vapor Open
We observe synchronisation in a thermal (35-60 °C) atomic (Rb) ensemble driven to a highly-excited Rydberg state (principle quantum number n ranging from 43 to 79). Synchronisation in this system is unexpected due to the atomic motion, how…
View article: Ergodicity breaking from Rydberg clusters in a driven-dissipative many-body system
Ergodicity breaking from Rydberg clusters in a driven-dissipative many-body system Open
It is challenging to probe ergodicity breaking trends of a quantum many-body system when dissipation inevitably damages quantum coherence originated from coherent coupling and dispersive two-body interactions. Rydberg atoms provide a test …
View article: Universality of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="double-struck">Z</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math> parafermions via edge-mode interaction and quantum simulation of topological space evolution with Rydberg atoms
Universality of parafermions via edge-mode interaction and quantum simulation of topological space evolution with Rydberg atoms Open
Parafermions are Zn generalizations of Majorana quasiparticles, with fractional non-Abelian statistics. They can be used to encode topological qudits and perform Clifford operations by their braiding. Here we investigate the generation of …