L. N. Pfeiffer
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View article: Geometric control of hyperbolic exciton-polariton condensate dimers
Geometric control of hyperbolic exciton-polariton condensate dimers Open
View article: Fractional quantum Hall state at $ν= 1/2$ with energy gap up to 6 K, and possible transition from one- to two-component state
Fractional quantum Hall state at $ν= 1/2$ with energy gap up to 6 K, and possible transition from one- to two-component state Open
The fractional quantum Hall state (FQHS) observed in the lowest Landau level at filling factor $ν=1/2$ in wide quantum wells has been enigmatic for decades because the two-dimensional electron system (2DES) has a bilayer charge distributio…
View article: Even-denominator fractional quantum Hall states with spontaneously broken rotational symmetry
Even-denominator fractional quantum Hall states with spontaneously broken rotational symmetry Open
The interplay between the fractional quantum Hall effect and nematicity is intriguing as it links emerging topological order and spontaneous symmetry breaking. Anisotropic fractional quantum Hall states (FQHSs) have indeed been reported in…
View article: Even-denominator fractional quantum Hall states with spontaneously broken rotational symmetry
Even-denominator fractional quantum Hall states with spontaneously broken rotational symmetry Open
The interplay between the fractional quantum Hall effect and nematicity is intriguing as it links emerging topological order and spontaneous symmetry breaking. Anisotropic fractional quantum Hall states (FQHSs) have indeed been reported in…
View article: Interaction-Driven Asymmetry in the Breakdown of the $ν$ = 1 Quantum Hall State
Interaction-Driven Asymmetry in the Breakdown of the $ν$ = 1 Quantum Hall State Open
We report real-time detection of longitudinal and transverse transport responses across distinct frequency bands in a ferromagnetic filling factor $ν$ = 1 integer quantum Hall state. By tuning $ν$, we simultaneously access the evolution of…
View article: Subnanosecond Electrical Control of Dipolariton-Based Optical Circuits with a Few Femtojoule per Bit Power Consumption
Subnanosecond Electrical Control of Dipolariton-Based Optical Circuits with a Few Femtojoule per Bit Power Consumption Open
The next generation of photonic circuits will require programmable, subnanosecond, and energy-efficient components on a scalable platform for quantum and neuromorphic computing. Here, we present subnanosecond electrical control of highly n…
View article: Topological protection in a Landau flat band at <i>v</i> = 7/11, a candidate filling factor for unconventional correlations
Topological protection in a Landau flat band at <i>v</i> = 7/11, a candidate filling factor for unconventional correlations Open
Strong interactions in Landau flat bands are known to stabilize correlated states that do not form in other types of flat bands. We report hallmarks of topological protection at the Landau level filling factor v=7/11 in a 2D electron syste…
View article: Mirror-mediated long-range coupling and robust phase locking of spatially separated exciton-polariton condensates
Mirror-mediated long-range coupling and robust phase locking of spatially separated exciton-polariton condensates Open
Lattice arrays have been shown to have great value as simulators for complicated mathematical problems. In all physical lattices so far, coupling is only between nearest neighbors or nearest plus next-nearest neighbors; the geometry of the…
View article: Quantum coherence of a long-lifetime exciton-polariton condensate
Quantum coherence of a long-lifetime exciton-polariton condensate Open
View article: Quantum coherence of a long-lifetime exciton-polariton condensate
Quantum coherence of a long-lifetime exciton-polariton condensate Open
In recent years, quantum information science has made significant progress, leading to a multitude of quantum protocols for the most diverse applications. States carrying resources such as quantum coherence are a key component for these pr…
View article: Persistent, controllable circulation of a polariton ring condensate
Persistent, controllable circulation of a polariton ring condensate Open
Persistent circulation is a canonical effect of superfluidity. In previous experiments, quantized circulation has been observed in polariton condensates, usually far from equilibrium, but persistent current in the absence of any stirring h…
View article: Two-dimensional hydrodynamic viscous electron flow in annular Corbino rings
Two-dimensional hydrodynamic viscous electron flow in annular Corbino rings Open
The concept of fluidic viscosity is ubiquitous in condensed-matter systems hosting a continuum where macroscopic properties can emerge. While an important property of liquids and some solids, only recently was the viscosity of an electron …
View article: Nonlinear transport of Wigner solid phase surrounding the two-flux composite fermion liquid
Nonlinear transport of Wigner solid phase surrounding the two-flux composite fermion liquid Open
We have investigated the low temperature (T) transport properties of fractional quantum Hall (FQH) states in a high-mobility two-dimensional hole gas. According to the composite fermion (CF) model, FQH states stemming from a half-filled La…
View article: Coherence of a non-equilibrium polariton condensate across the interaction-mediated phase transition
Coherence of a non-equilibrium polariton condensate across the interaction-mediated phase transition Open
The emergence of spatial coherence in a confined two-dimensional Bose gas of exciton polaritons with tuneable interactions offers a unique opportunity to explore the role of interactions in a phase transition in a driven-dissipative quantu…
View article: Emerging supersolidity in photonic-crystal polariton condensates
Emerging supersolidity in photonic-crystal polariton condensates Open
A supersolid is a counter-intuitive phase of matter in which its constituent particles are arranged into a crystalline structure, yet they are free to flow without friction. This requires the particles to share a global macroscopic phase w…
View article: Collective neutral excitations as sensitive probe for the quality of 2D charge carrier systems in ultra-pure GaAs quantum wells
Collective neutral excitations as sensitive probe for the quality of 2D charge carrier systems in ultra-pure GaAs quantum wells Open
Ultra-clean low-dimensional interacting charge carrier systems are the basis to explore correlated states and phases. We report the observation of very narrow collective intersubband excitations (ISBE) of 2D electron systems (2DESs) with u…
View article: Competing many-body phases at small fillings in ultrahigh-quality GaAs two-dimensional hole systems: Role of Landau level mixing
Competing many-body phases at small fillings in ultrahigh-quality GaAs two-dimensional hole systems: Role of Landau level mixing Open
The fractional quantum Hall state (FQHS), an incompressible liquid state hosting anyonic excitations with fractional charge and statistics, represents a compelling many-body phase observed in clean two-dimensional (2D) carrier systems. The…
View article: Collective neutral excitations as sensitive probe for the quality of 2D charge carrier systems in ultra-pure GaAs quantum wells
Collective neutral excitations as sensitive probe for the quality of 2D charge carrier systems in ultra-pure GaAs quantum wells Open
View article: Strong coupling of polaritons at room temperature in a GaAs/AlGaAs structure
Strong coupling of polaritons at room temperature in a GaAs/AlGaAs structure Open
We report direct measurement of the dispersion relation of polaritons in GaAs/AlGaAs microcavity structures at room temperature, which clearly shows that the polaritons are in the strong coupling limit. The Rabi splitting of the polariton …
View article: Microwave-regime demonstration of plasmonic non-reciprocity in a flowing two-dimensional electron gas
Microwave-regime demonstration of plasmonic non-reciprocity in a flowing two-dimensional electron gas Open
The speed of a plasmonic wave in the presence of electron drift in a conductor depends on the wave's propagation direction, with the wave traveling along the drift (`forward wave') faster than the wave traveling against the drift (`backwar…
View article: Ultrafast electrical control of dipolariton-based optical circuits with a few femto-joul per bit power consumption
Ultrafast electrical control of dipolariton-based optical circuits with a few femto-joul per bit power consumption Open
The next generation of photonic circuits will require programmable, ultrafast, and energy-efficient components on a scalable platform for quantum and neuromorphic computing. Here, we present ultrafast electrical control of highly nonlinear…
View article: Developing Fractional Quantum Hall States at Even-Denominator Fillings <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:mn>6</mml:mn></mml:mrow></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:mn>8</mml:mn></mml:mrow></mml:math>
Developing Fractional Quantum Hall States at Even-Denominator Fillings and Open
In the extreme quantum limit, when the Landau level filling factor ν<1, the dominant electron-electron interaction in low-disorder two-dimensional electron systems leads to exotic many-body phases. The ground states at even-denominator ν=1…
View article: Exciton-polariton ring Josephson junction
Exciton-polariton ring Josephson junction Open
View article: High-energy neutrinos from blazars
High-energy neutrinos from blazars Open
Identifying the origin of the majority of high-energy cosmic neutrinos observed by the IceCube Neutrino Observatory remains a significant challenge. Previous studies reported evidence of a spatial correlation between blazars listed in the …
View article: The physical properties of candidate neutrino-emitter blazars
The physical properties of candidate neutrino-emitter blazars Open
High-energy neutrinos detected by the IceCube Observatory provide a unique opportunity to study the origin of cosmic rays and the nature of the sources producing them. Among the putative birthplaces of astrophysical highenergy neutrinos, b…
View article: Density Dependence of the Phases of the <i>v</i> = 1 Integer Quantum Hall Plateau in Low Disorder Electron Gases
Density Dependence of the Phases of the <i>v</i> = 1 Integer Quantum Hall Plateau in Low Disorder Electron Gases Open
Recent magnetotransport measurements in low‐disorder electron systems confined to GaAs/AlGaAs samples reveal that the v = 1 integer quantum Hall plateau is broken into three distinct regions. These three regions are associated with two pha…
View article: Bose–Einstein Condensation of Polaritons at Room Temperature in a GaAs/AlGaAs Structure
Bose–Einstein Condensation of Polaritons at Room Temperature in a GaAs/AlGaAs Structure Open
We report the canonical properties of the Bose-Einstein condensation of polaritons in the weak coupling regime, seen previously in many low-temperature experiments, at room temperature in a GaAs/AlGaAs structure. These effects include a no…
View article: Quantum fluid dimers of hyperbolic exciton-polariton condensates
Quantum fluid dimers of hyperbolic exciton-polariton condensates Open
Coupled many-body quantum systems give rise to rich emergent physics and abundance of both stationary and dynamical behaviours. Designing platforms with tunable and distinct forms of coupling gives new insight into the collective behaviour…
View article: Emerging supersolidity in photonic crystal polariton condensates
Emerging supersolidity in photonic crystal polariton condensates Open
These are the processed datasets for the figures in the main text of "Emerging supersolidity in photonic crystal polariton condensates" as appears in Nature.
View article: Design and fabrication of robust hybrid photonic crystal cavities
Design and fabrication of robust hybrid photonic crystal cavities Open
Heterogeneously integrated hybrid photonic crystal cavities enable strong light–matter interactions with solid state, optically addressable quantum memories. A key challenge to realizing high quality factor ( Q ) hybrid photonic crystals i…