137 citations · 778 across the 25 of their papers we have counts for
25 papers
Large spin shuttling oscillations enabling high-fidelity single qubit gates
Akshay Menon Pazhedath, Alessandro David, Max Oberländer +4
Semiconductor quantum dots have shown impressive breakthroughs in the last years, with single and two qubit gate fidelities matching other leading platforms and scalability still r…
Exponentiation of Parametric Hamiltonians via Unitary interpolation
Michael Schilling, Francesco Preti, Matthias M. Müller +2
The effort to generate matrix exponentials and associated differentials, required to determine the time evolution of quantum systems, frequently constrains the evaluation of proble…
Analytical solutions for optimal photon absorption into inhomogeneous spin memories
József Zsolt Bernád, Michael Schilling, Yutian Wen +4
We investigate for optimal photon absorption a quantum electrodynamical model of an inhomogeneously-broadened spin ensemble coupled to a single-mode cavity. Solutions to this probl…
Analyzing the collective emission of a Rydberg-blockaded single-photon source based on an ensemble of thermal atoms
Jan A. P. Reuter, Max Mäusezahl, Felix Moumtsilis +4
An ensemble of Rubidum atoms can be excited with lasers such that it evolves into an entangled state with just one collective excitation within the Rydberg blockade radius. The dec…
QuOCS: The Quantum Optimal Control Suite
Marco Rossignolo, Thomas Reisser, Alastair Marshall +9
Quantum optimal control includes the family of pulse-shaping algorithms that aim to unlock the full potential of a variety of quantum technologies. Our Quantum Optimal Control Suit…
Macroscopic Hyperpolarization Enhanced with Quantum Optimal Control
Alastair Marshall, Thomas Reisser, Phila Rembold +13
Hyperpolarization of nuclear spins enhances nuclear magnetic resonance signals, which play a key role for imaging and spectroscopy in the natural and life sciences. This signal amp…
Robust Magnetometry with Single NV Centers via Two-step Optimization
Nimba Oshnik, Phila Rembold, Tommaso Calarco +3
Shallow Nitrogen-Vacancy (NV) centers are promising candidates for high-precision sensing applications; these defects, when positioned a few nanometers below the surface, provide a…
One decade of quantum optimal control in the chopped random basis
Matthias M. Müller, Ressa S. Said, Fedor Jelezko +2
The Chopped RAndom Basis (CRAB) ansatz for quantum optimal control has been proven to be a versatile tool to enable quantum technology applications, quantum computing, quantum simu…
Information flow and error scaling for fully-quantum control
Stefano Gherardini, Matthias M. Müller, Simone Montangero +2
The optimally designed control of quantum systems is playing an increasingly important role to engineer novel and more efficient quantum technologies. Here, in the scenario represe…
Information Theoretical Limits for Quantum Optimal Control Solutions: Error Scaling of Noisy Channels
Matthias M. Müller, Stefano Gherardini, Tommaso Calarco +2
Accurate manipulations of an open quantum system require a deep knowledge of its controllability properties and the information content of the implemented control fields. By using…
Advances in sequential measurement and control of open quantum systems
Stefano Gherardini, Andrea Smirne, Matthias M. Müller +1
Novel concepts, perspectives and challenges in measuring and controlling an open quantum system via sequential schemes are shown. We discuss how similar protocols, relying both on…
Noise-robust quantum sensing via optimal multi-probe spectroscopy
Matthias M. Müller, Stefano Gherardini, Filippo Caruso
The dynamics of quantum systems are unavoidably influenced by their environment and in turn observing a quantum system (probe) can allow one to measure its environment: Measurement…
Reconstructing quantum entropy production to probe irreversibility and correlations
Stefano Gherardini, Matthias M. Müller, Andrea Trombettoni +2
One of the major goals of quantum thermodynamics is the characterization of irreversibility and its consequences in quantum processes. Here, we discuss how entropy production provi…
Stochastic quantum Zeno-based detection of noise correlations
Matthias M. Müller, Stefano Gherardini, Filippo Caruso
A system under constant observation is practically freezed to the measurement subspace. If the system driving is a random classical field, the survival probability of the system in…
Quantum Zeno Dynamics through stochastic protocols
Matthias M. Müller, Stefano Gherardini, Filippo Caruso
Quantum Zeno Dynamics is the phenomenon that the observation or strong driving of a quantum system can freeze its dynamics to a subspace, effectively truncating the Hilbert space o…
Fisher information from stochastic quantum measurements
Matthias M. Müller, Stefano Gherardini, Augusto Smerzi +1
The unavoidable interaction between a quantum system and the external noisy environment can be mimicked by a sequence of stochastic measurements whose outcomes are neglected. Here…
Dressing the chopped-random-basis optimization: a bandwidth-limited access to the trap-free landscape
Niklas Rach, Matthias M. Müller, Tommaso Calarco +1
In quantum optimal control theory the success of an optimization algorithm is highly influenced by how the figure of merit to be optimized behaves as a function of the control fiel…
Optimal Phonon-to-Spin Mapping in a system of a trapped ion
Matthias M. Müller, Ulrich G. Poschinger, Tommaso Calarco +2
We propose a protocol for measurement of the phonon number distribution of a harmonic oscillator based on selective mapping to a discrete spin-1/2 degree of freedom. We consider a…
Quantum optimal control within the rotating wave approximation
Maximilian Keck, Matthias M. Müller, Tommaso Calarco +1
We study the interplay between rotating wave approximation and optimal control. In particular, we show that for a wide class of optimal control problems one can choose the control…
Optimizing for an arbitrary perfect entangler. II. Application
Michael H. Goerz, Giulia Gualdi, Daniel M. Reich +7
The difficulty of an optimization task in quantum information science depends on the proper mathematical expression of the physical target. Here we demonstrate the power of optimiz…
Optimizing for an arbitrary perfect entangler: I. Functionals
Paul Watts, Jiří Vala, Matthias M. Müller +5
Optimal control theory is a powerful tool for improving figures of merit in quantum information tasks. Finding the solution to any optimal control problem via numerical optimizatio…
Room temperature Rydberg Single Photon Source
M. M. Müller, A. Kölle, R. Löw +3
We present an optimal protocol to implement a room temperature Rydberg single photon source within an experimental setup based on micro cells filled with thermal vapor. The optimiz…
Towards an experimentally feasible controlled-phase gate on two blockaded Rydberg atoms
Matthias M. Müller, Michael Murphy, Simone Montangero +3
We investigate the implementation of a controlled-Z gate on a pair of Rydberg atoms in spatially separated dipole traps where the joint excitation of both atoms into the Rydberg le…
Prospects for fast Rydberg gates on an atom chip
Matthias M. Müller, Harald R. Haakh, Tommaso Calarco +2
Atom chips are a promising candidate for a scalable architecture for quantum information processing provided a universal set of gates can be implemented with high fidelity. The dif…