Results 21 to 30 of about 17,439,974 (328)
Quantum circuits with classical versus quantum control of causal order [PDF]
, 2021 Quantum supermaps are transformations that map quantum operations to quantum operations. It is known that quantum supermaps which respect a definite, predefined causal order between their input operations correspond to fixed-order quantum circuits.
Julian Wechs +3 more
semanticscholar +1 more source
Measurement-Based Feedback Quantum Control with Deep Reinforcement Learning for a Double-Well Nonlinear Potential. [PDF]
Physical Review Letters, 2021 Closed loop quantum control uses measurement to control the dynamics of a quantum system to achieve either a desired target state or target dynamics.
Sangkha Borah +4 more
semanticscholar +1 more source
Quantum control methods for robust entanglement of trapped ions [PDF]
Journal of Physics B: Atomic, Molecular and Optical Physics, 2022 A major obstacle in the way of practical quantum computing is achieving scalable and robust high-fidelity entangling gates. To this end, quantum control has become an essential tool, as it can make the entangling interaction resilient to sources of noise.
C. Valahu +3 more
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Uncomputability and complexity of quantum control. [PDF]
Sci Rep, 2020 In laboratory and numerical experiments, physical quantities are known with a finite precision and described by rational numbers. Based on this, we deduce that quantum control problems both for open and closed systems are in general not algorithmically ...
Bondar DI, Pechen AN.
europepmc +3 more sources
Quantum control landscape for ultrafast generation of single-qubit phase shift quantum gates [PDF]
Journal of Physics A: Mathematical and Theoretical, 2021 Mathematical analysis of quantum control landscapes, which aims to prove either absence or existence of traps for quantum control objective functionals, is an important topic in quantum control.
B. Volkov, O. Morzhin, A. Pechen
semanticscholar +1 more source
Universal quantum control of an atomic spin qubit on a surface
npj Quantum Information, 2023 Scanning tunneling microscopy (STM) enables the bottom-up fabrication of tailored spin systems on a surface that are engineered with atomic precision. When combining STM with electron spin resonance (ESR), these single atomic and molecular spins can be ...
Yu Wang +7 more
semanticscholar +1 more source
Real-time optimal quantum control of mechanical motion at room temperature [PDF]
Nature, 2020 The ability to accurately control the dynamics of physical systems by measurement and feedback is a pillar of modern engineering1. Today, the increasing demand for applied quantum technologies requires adaptation of this level of control to individual ...
Lorenzo Magrini +8 more
semanticscholar +1 more source
Model-Predictive Quantum Control via Hamiltonian Learning
IEEE Transactions on Quantum Engineering, 2022 This article proposes an end-to-end framework for the learning-enabled control of closed quantum systems. The proposed learning technique is the first of its kind to utilize a hierarchical design, which layers probing control, quantum state tomography ...
Maison Clouâtré +2 more
semanticscholar +1 more source
Software tools for quantum control: improving quantum computer performance through noise and error suppression [PDF]
Quantum Science and Technology, 2020 Effectively manipulating quantum computing (QC) hardware in the presence of imperfect devices and control systems is a central challenge in realizing useful quantum computers.
H. Ball +17 more
semanticscholar +1 more source
Boson-Controlled Quantum Transport [PDF]
Physical Review Letters, 2007 We study the interplay of collective dynamics and damping in the presence of correlations and bosonic fluctuations within the framework of a newly proposed model, which captures the principal transport mechanisms that apply to a variety of physical systems. We establish close connections to the transport of lattice and spin polarons, or the dynamics of
Alvermann, A. +2 more
openaire +3 more sources