Search arXiv⌕ Search
Home/Archive/arXiv

arXiv · 2610.23106

From quantum emitters to technological platforms: a perspective on semiconductor quantum dots

Klaus D. Jöns·Dorian A. Gangloff·Doris E. Reiter
View original source ↗Read source document ↗Export metadata ↓

Abstract

Photonic quantum technologies are based on controlled photon states. To generate these, quantum dots have emerged as excellent sources of single and entangled photons. In this Perspective, we briefly review the chronological development of quantum dots as photon sources, from their beginnings as quantum emitters in the early 2000s to the advanced photonic devices being developed today. We highlight the interplay between fundamental research and industrial aspects before discussing the photonic quantum technologies we expect to emerge in the near future.

Explore related subjects

cond-mat.mes-hallquant-ph

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Klaus D. Jöns, Dorian A. Gangloff, Doris E. Reiter. 2026-10-16. From quantum emitters to technological platforms: a perspective on semiconductor quantum dots. https://arxiv.org/abs/2610.23106

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related papers

arXiv2026

Fully gapped superconductivity in magic-angle graphene Cooper-pair islands

The mechanism behind superconductivity in magic-angle graphene systems remains an open question. Recent tunnelling and superfluid stiffness measurements have suggested a nodal superconducting gap, but these probes are typically applied to large-area devices, where twist-angle inhomogeneity and disorder can hinder resolving the intrinsic superconducting spectrum. Here we introduce quantum dots in magic-angle twisted bilayer graphene and access a regime where gate-tunable superconductivity competes with strong Coulomb repulsion upon adding an additional carrier to the island. The islands exhibit $2e$-periodic Coulomb blockade, revealing a well-defined quasiparticle gap in the island spectrum, inconsistent with the presence of nodes in the order parameter. Within the same device, we also realize coupled superconducting islands and proximitized quantum dots, establishing a monolithic platform for hybrid dot devices. Our results point to a nodeless quasiparticle gap in moiré graphene and demonstrate the potential of mesoscopic hybrid structures to probe their correlated phases.

cond-mat.mes-hall↗
arXiv2026

Direct Observation of Nanoscale Polarization Switching in HZO Ferroelectrics Using STEM-EBIC

We report the experimental observation of discrete ferroelectric switching down to 0.475 nm x 0.475 nm in HfO2-based ferroelectrics using correlated STEM electron beam induced current (EBIC) imaging and nanoscale voltage pulsing. These high-resolution measurements reveal single-domain switching events characterized by abrupt, bi-state transitions with no intermediate polarization states. By mapping polarization-voltage behavior and switching kinetics across thousands of domains, we extract spatially resolved switching thresholds (Emin), switching speeds (tsw), and remanent polarization (2Pr), uncovering robust scaling trends. Larger domains exhibit nearly twice the polarization and faster switching despite higher Emin, while smaller domains switch more slowly at the same field. Sub-domain imaging enables quantification of variation scaling: polarization variation increases linearly logarithmically with area, with inter-domain variation dominating intra-domain variation. Importantly, we show that multi-bit operation arises from the statistical distribution of domain-level switching, rather than partial polarization, enabling distinct and reliable states in devices as small as 0.01 um2. These findings provide a foundational experimental framework for designing scalable, multi-bit ferroelectric memory based on grain- and domain-level heterogeneity.

cond-mat.mes-hall↗
arXiv2026

Chirality-resolved imaging of spin waves with a quantum spin

Spin waves carry their propagation direction in the handedness of their circularly polarized stray field, a property inaccessible to scalar magnetometers. In the Damon-Eshbach surface wave of an in-plane magnetized film, the dipolar field above the film rotates with a handedness fixed by the direction of travel. The nitrogen-vacancy (NV) centre in diamond is an intrinsic polarization analyser: a right-handed field about the NV axis drives one spin transition, and a left-handed field drives the other, in both the ground and the excited state. Here, we exploit the two excited-state transitions, which lie inside the spin-wave band of yttrium iron garnet (YIG), as a pair of chirality channels and image Damon-Eshbach waves in both directions. Because reflection from an etched boundary reverses the handedness, the incident and reflected waves appear as two lines in one spectrum and are imaged separately. In the ground state, the same rule applies, and the selected field drives Rabi oscillations, a route to chirality-selective control of the NV spin by magnons. Reading the two channels gives the direction of a spin wave at one point, without a phase reference. This advances chirality-resolved quantum sensing and provides insight into chiral spin-wave dynamics.

cond-mat.mes-hall↗