12 citations · 52 across the 16 of their papers we have counts for
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Protecting Heisenberg scaling in quantum metrology via engineered dressed states
Wojciech Gorecki, Christiane P. Koch
Quantum metrology promises precision beyond classical limits but environmental noise, unless properly controlled, reduces the quantum advantage to at most a constant improvement. A…
Mitigating Dynamic Crosstalk with Optimal Control
Matthias G. Krauss, Luise C. Butzke, Christiane P. Koch
The prevalence of quantum crosstalk is an important barrier to scaling frequency-addressable qubit architectures, with dynamic crosstalk being particularly difficult to detect and…
Obstacles to Continuous Quantum Error Correction via Parity Measurements
Anton Halaski, Christiane P. Koch
Time-continuous quantum error correction, necessary to protect quantum information under time-dependent Hamiltonians, relies on weak continuous syndrome measurements. Implementing…
Motional entanglement in low-energy collisions near shape resonances
Yimeng Wang, Christiane P. Koch
Einstein, Podolsky, and Rosen discussed their paradox in terms of measuring the positions or momenta of two particles. These degrees of freedom can become entangled upon scattering…
Introduction to quantum control: From basic concepts to applications in quantum technologies
Christiane P. Koch
Quantum control refers to our ability to manipulate quantum systems. This tutorial-style chapter focuses on the use of classical electromagnetic fields to steer the system dynamics…
Achieving fast and robust perfect entangling gates via reinforcement learning
Leander Grech, Matthias G. Krauss, Mirko Consiglio +4
Noisy intermediate-scale quantum computers hold the promise of tackling complex and otherwise intractable computational challenges through the massive parallelism offered by qubits…
The perfect entangler spectrum as a tool to analyze crosstalk
Matthias G. Krauss, Christiane P. Koch
Crosstalk is a key obstacle to scaling up quantum computers. It may arise from persistent qubit-qubit couplings or dynamically during gate operation, with the latter being particul…
Scalable modular architecture for universal quantum computation
Fernando Gago-Encinas, Christiane P. Koch
Universal quantum computing requires the ability to perform every unitary operation, i.e., evolution operator controllability. In view of developing resource-efficient quantum proc…
Universal cooling of quantum systems via randomized measurements
Josias Langbehn, George Mouloudakis, Emma King +5
Designing cooling protocols is believed to require knowledge of the system spectrum. In contrast, cooling in nature occurs whenever the system is coupled to a cold bath. How does n…
Speeding up Quantum Annealing with Engineered Dephasing
Mykolas Sveistrys, Josias Langbehn, Raphaël Menu +3
Building on the insight that engineered noise, specifically, engineered dephasing can enhance the adiabaticity of controlled quantum dynamics, we investigate how a dephasing-genera…
Quantum Optimal Control of Squeezing in Cavity Optomechanics
Anton Halaski, Matthias G. Krauss, Daniel Basilewitsch +1
Squeezing is a non-classical feature of quantum states that is a useful resource, for example in quantum sensing of mechanical forces. Here, we show how to use optimal control theo…
Dilute measurement-induced cooling into many-body ground states
Josias Langbehn, Kyrylo Snizhko, Igor Gornyi +3
Cooling a quantum system to its ground state is important for the characterization of non-trivial interacting systems, and in the context of a variety of quantum information platfo…
Fast and robust cat state preparation utilizing higher order nonlinearities in Rydberg ensembles
S. Zhao, M. G. Krauss, T. Bienaime +4
In optical and solid-state architectures, low-order nonlinearities are commonly exploited for quantum state preparation due to their practical accessibility and controllability, wh…
Chaotic fluctuations in a universal set of transmon qubit gates
Daniel Basilewitsch, Simon-Dominik Börner, Christoph Berke +3
Transmon qubits arise from the quantization of nonlinear resonators, systems that are prone to the buildup of strong, possibly chaotic, fluctuations. Such instabilities will likely…
Time optimization and state-dependent constraints in the quantum optimal control of molecular orientation
M. Ndong, C. Koch, D. Sugny
We apply two recent generalizations of monotonically convergent optimization algorithms to the control of molecular orientation by laser fields. We show how to minimize the control…
Comparative study of monotonically convergent optimization algorithms for the control of molecular rotation
M. Ndong, M. Lapert, C. Koch +1
We apply two different monotonically convergent optimization algorithms to the control of molecular rotational dynamics by laser pulses. This example represents a quantum control p…