711 citations · 5.5k across the 188 of their papers we have counts for
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Floquet Theory and Average Hamiltonian Theory Revisited: Equivalence, Convergence and Applications to NMR
Antonia J. Bock, Matthias Ernst, Götz S. Uhrig
An accurate theoretical treatment of periodically driven quantum systems is crucial for various fields in the exact sciences, for instance Nuclear Magnetic Resonance (NMR) spectros…
Entanglement-informed Construction of Variational Quantum Circuits
Alina Joch, Götz S. Uhrig, Benedikt Fauseweh
The Variational Quantum Eigensolver (VQE) is a promising tool for simulating ground states of quantum many-body systems on noisy quantum computers. Its effectiveness relies heavily…
Efficient flow equations for dissipative systems
Gary Schmiedinghoff, Götz S. Uhrig
Open quantum systems provide an essential theoretical basis for the development of novel quantum technologies, since any real quantum system inevitably interacts with its environme…
Quantum mechanical treatment of large spin baths
Robin Röhrig, Philipp Schering, Lars B. Gravert +2
The electronic spin in quantum dots can be described by central spin models (CSMs) with a very large number to of bath spins posing a tremendou…
Persisting correlations of a central spin coupled to large spin baths
Urban Seifert, Philip Bleicker, Philipp Schering +2
The decohering environment of a quantum bit is often described by the coupling to a large bath of spins. The quantum bit itself can be seen as a spin which is commonly call…
Anomalous behavior of control pulses in presence of noise with singular autocorrelation
Daniel Stanek, Benedikt Fauseweh, Christopher Stihl +2
We report on the anomalous behavior of control pulses for spins under spin-spin relaxation and subject to classical noise with a singular autocorrelation function. This behavior is…
Modulated pulses compensating classical noise
Christopher Stihl, Benedikt Fauseweh, Stefano Pasini +1
We consider pulses of finite duration for coherent control in the presence of classical noise. We derive the corrections to ideal, instantaneous pulses for the case of general deco…
Frequency modulated pulses for quantum bits coupled to time-dependent baths
Benedikt Fauseweh, Stefano Pasini, Götz S. Uhrig
We consider the coherent control of a quantum bit by the use of short pulses with finite duration τ_p. By shaping the pulse, we perturbatively decouple the dynamics of the bath fro…
Perfect state transfer in XX chains induced by boundary magnetic fields
Thorben Linneweber, Joachim Stolze, Götz S. Uhrig
A recent numerical study of short chains found near-perfect quantum state transfer between the boundary sites of a spin-1/2 XX chain if a sufficiently strong magnetic field acts on…
Symmetry-Enhanced Performance of Dynamical Decoupling
S. Pasini, G. S. Uhrig
We consider a system with general decoherence and a quadratic dynamical decoupling sequence (QDD) for the coherence control of a qubit coupled to a bath of spins. We investigate th…
High Order Coherent Control Sequences of Finite-Width Pulses
S. Pasini, P. Karbach, G. S. Uhrig
The performance of sequences of designed pulses of finite length is analyzed for a bath of spins and it is compared with that of sequences of ideal, instantaneous pulses. The d…
Optimized Dynamical Decoupling for Time Dependent Hamiltonians
Stefano Pasini, Götz S. Uhrig
The validity of optimized dynamical decoupling (DD) is extended to analytically time dependent Hamiltonians. As long as an expansion in time is possible the time dependence of the…
Optimized Dynamical Decoupling for Power Law Noise Spectra
S. Pasini, G. S. Uhrig
We analyze the suppression of decoherence by means of dynamical decoupling in the pure-dephasing spin-boson model for baths with power law spectra. The sequence of ideal pulses…
Efficient Coherent Control by Optimized Sequences of Pulses of Finite Duration
Götz S. Uhrig, Stefano Pasini
Reliable long-time storage of arbitrary quantum states is a key element for quantum information processing. In order to dynamically decouple a spin or quantum bit from a dephasing…
Concatenated Control Sequences based on Optimized Dynamic Decoupling
Götz S. Uhrig
Two recent developments in quantum control, concatenation and optimization of pulse intervals, are combined to yield a strategy to suppress unwanted couplings in quantum systems to…
Numerical Analysis of Optimized Coherent Control Pulses
P. Karbach, S. Pasini, G. S. Uhrig
Numerically we simulate the effect of optimized coherent control pulses with a finite duration on a qubit in a bath of spins. The pulses of finite duration are compared with ideal…
Exact Results on Dynamical Decoupling by -Pulses in Quantum Information Processes
Götz S. Uhrig
The aim of dynamical decoupling consists in the suppression of decoherence by appropriate coherent control of a quantum register. Effectively, the interaction with the environment…
Optimization of Short Coherent Control Pulses
S. Pasini, T. Fischer, P. Karbach +1
The coherent control of small quantum system is considered. For a two-level system coupled to an arbitrary bath we consider a pulse of finite duration. We derive the leading and th…
Keeping a Quantum Bit Alive by Optimized -Pulse Sequences
Götz S. Uhrig
A general strategy to maintain the coherence of a quantum bit is proposed. The analytical result is derived rigorously including all memory and back-action effects. It is based on…
Berry's phase for large spins in external fields
V. A. Kalatsky, E. Müller--Hartmann, V. L. Pokrovsky +1
It is shown that even for large spins the fundamental difference between integer and half-integer spins persists. In a quasi-classical description this difference enters via Be…