Theory of molecular excitation and relaxation near a plasmonic device

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In this thesis, we give new protocols that offer a quantum advantage for problems in ML, Physics, and Finance. Quantum mechanics gives predictions that are inconsistent with local realism. The experiment proving this fact (Bell, 1964) gives a quantum proto ...

Advancing quantum technologies depends on the precise control of individual quantum systems, the so-called qubits, and the exploitation of their quantum properties. Nowadays, expanding the number of qubits to be entangled is at the core of the developments ...

We propose an adaptive quantum algorithm to prepare accurate variational time evolved wave functions. The method is based on the projected variational quantum dynamics (pVQD) algorithm, that performs a global optimization with linear scaling in the number ...

Mechanical oscillators can exhibit modes with ultra-low energy dissipation and compact form factors due to the slow velocity of acoustic waves, and are already used in applications ranging from timing to wireless filters. Over the past decade, novel ways i ...

Simulating the dynamics of large quantum systems is a formidable yet vital pursuit for obtaining a deeper understanding of quantum mechanical phenomena. While quantum computers hold great promise for speeding up such simulations, their practical applicatio ...

Over the past decade, quantum photonics platforms aiming at harnessing the fundamental properties of single particles, such as quantum superposition and quantum entanglement, have flourished. In this context, single-photon emitters capable of operating at ...

Randomized measurement protocols such as classical shadows represent powerful resources for quantum technologies, with applications ranging from quantum state characterization and process tomography to machine learning and error mitigation. Recently, the n ...

Parametric amplifiers play a crucial role in modern quantum technology by enabling the enhancement of weak signals with minimal added noise. Traditionally, Josephson junctions have been the primary choice for constructing parametric amplifiers. Nevertheles ...

Entanglement forging based variational algorithms leverage the bipartition of quantum systems for addressing ground-state problems. The primary limitation of these approaches lies in the exponential summation required over the numerous potential basis stat ...

At room temperature, mechanical motion driven by the quantum backaction of light has been observed only in pioneering experiments in which an optical restoring force controls the oscillator stiffness1,2. For solid-state mechanical resonators in which oscil ...

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Chaos sets a fundamental limit to quantum-information processing schemes. We study the onset of chaos in spatially extended quantum many-body systems that are relevant to quantum optical devices. We consider an extended version of the Tavis-Cummings model ...

We introduce a model-independent method for the efficient simulation of low-entropy systems, whose dynamics can be accurately described with a limited number of states. Our method leverages the time-dependent variational principle to efficiently integrate ...

High-resolution carbon K-edge X-ray photoelectron, X-ray absorption, non-resonant and resonant Auger spectra are presented of gas phase trans-1,3-butadiene alongside a detailed theoretical analysis utilising nuclear ensemble approaches and vibronic models ...

Molecular junctions represent a fascinating frontier in the realm of nanotechnology and are one of the smallest optoelectronic devices possible, consisting of individual molecules or a group of molecules that serve as the active element sandwiched between ...

Theory of molecular excitation and relaxation near a plasmonic device

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Low-Rank Variational Quantum Algorithm for the Dynamics of Open Quantum Systems

Grayscale nanopatterning for strain-engineered 2D materials

Room-Temperature Quantum Optomechanics and Free-Electron Quantum Optics

Scalable Quantum Algorithms for Noisy Quantum Computers

Quantum Protocols for ML, Physics, and Finance

Electron-beam based nanoscale quantum controls

Adaptive projected variational quantum dynamics

Ultra-high quantum coherent and scalable superconducting circuit optomechanics, from topological lattices to quantum storage

Overhead-constrained circuit knitting for variational quantum dynamics

Investigation of room-temperature single-photon emitters in GaN-based materials and GaN/AlN quantum dots

Dual-frame optimization for informationally complete quantum measurements

Three-wave-mixing quantum-limited kinetic inductance parametric amplifier operating at 6 T near 1 K

Hybrid ground-state quantum algorithms based on neural Schrödinger forging

Room-temperature quantum optomechanics using an ultralow noise cavity

Quantum Error Correction and Simulation in Open Bosonic Systems

Expanding the fluorescence microscopy toolbox with fluorogenic polymethine dyes

Transition to chaos in extended systems and their quantum impurity models

Adaptive variational low-rank dynamics for open quantum systems

Deconvolution of the X-ray absorption spectrum of trans-1,3-butadiene with resonant Auger spectroscopy

Plasmonically enhanced molecular junctions for investigation of atomic-scale fluctuations in self-assembled monolayers