Results 11 to 20 of about 25,077,604 (385)
Quantum Zeno Effect in Open Quantum Systems [PDF]
Annales Henri Poincaré, 2021 AbstractWe prove the quantum Zeno effect in open quantum systems whose evolution, governed by quantum dynamical semigroups, is repeatedly and frequently interrupted by the action of a quantum operation. For the case of a quantum dynamical semigroup with a bounded generator, our analysis leads to a refinement of existing results and extends them to a ...
Becker, Simon +2 more
openaire +2 more sources
International Journal of Modern Physics E, 1994 The damping of the harmonic oscillator is studied in the framework of the Lindblad theory for open quantum systems. A generalization of the fundamental constraints on quantum mechanical diffusion coefficients which appear in the master equation for the damped quantum oscillator is presented; the Schrödinger, Heisenberg and Weyl-Wigner-Moyal ...
Isar, A. +4 more
openaire +2 more sources
Quantum System Identification [PDF]
Physical Review Letters, 2012 The aim of quantum system identification is to estimate the ingredients inside a black box, in which some quantum-mechanical unitary process takes place, by just looking at its input-output behavior. Here we establish a basic and general framework for quantum system identification, that allows us to classify how much knowledge about the quantum system ...
Burgarth, Daniel, Yuasa, Kazuya
openaire +3 more sources
Nature Reviews Physics, 2023 The future development of quantum technologies relies on creating and manipulating quantum systems of increasing complexity, with key applications in computation, simulation and sensing. This poses severe challenges in the efficient control, calibration and validation of quantum states and their dynamics.
Valentin Gebhart +9 more
openaire +3 more sources
Biorthogonal quantum systems [PDF]
Journal of Mathematical Physics, 2007 Models of PT symmetric quantum mechanics provide examples of biorthogonal quantum systems. The latter incorporate all the structure of PT symmetric models, and allow for generalizations, especially in situations where the PT construction of the dual space fails.
Curtright, Thomas, Mezincescu, Luca
openaire +2 more sources
Quantum computation in quantum-Hall systems [PDF]
Physics Letters A, 1998 We describe a quantum information processor (quantum computer) based on the hyperfine interactions between the conduction electrons and nuclear spins embedded in a two-dimensional electron system in the quantum-Hall regime. Nuclear spins can be controlled individually by electromagnetic pulses.
Privman, V., Vagner, I. D., Kventsel, G.
openaire +3 more sources
Quantum degenerate systems [PDF]
Journal of Mathematical Physics, 2012 A degenerate dynamical system is characterized by a symplectic structure whose rank is not constant throughout phase space. Its phase space is divided into causally disconnected, nonoverlapping regions in each of which the rank of the symplectic matrix is constant, and there are no classical orbits connecting two different regions. Here the question of
de Micheli, Fiorenza, Zanelli, Jorge
openaire +9 more sources
Spontaneous emission of matter waves from a tunable open quantum system [PDF]
Nature, 2017 The decay of an excited atom undergoing spontaneous photon emission into the fluctuating quantum-electrodynamic vacuum is an emblematic example of the dynamics of an open quantum system.
L. Krinner +4 more
semanticscholar +1 more source
Demonstration of quantum volume 64 on a superconducting quantum computing system [PDF]
Quantum Science and Technology, 2020 We improve the quality of quantum circuits on superconducting quantum computing systems, as measured by the quantum volume (QV), with a combination of dynamical decoupling, compiler optimizations, shorter two-qubit gates, and excited state promoted ...
P. Jurcevic +30 more
semanticscholar +1 more source
Quantum learning unravels quantum system
Science, 2022 A quantum computer has a decisive advantage in analyzing quantum experiment ...
openaire +3 more sources