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Multi-channel quantum parameter estimation
The aim of quantum metrology is to exploit quantum effects to improve the precision of parameter estimation beyond its classical limit. In this paper, we investigate the quantum parameter estimation problem wi...
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Controllability of Quantum Systems with SU(1, 1) Dynamical Symmetry
This paper presents sufficient and necessary conditions for the propagator controllability of a class of infinite-dimensional quantum systems with SU(1, 1) dynamical symmetry through the isomorphic map** to the...
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The modelling of quantum control systems
High-performance control of quantum dynamics is key to the development of quantum technologies. From quantum-state engineering to quantum metrology, theory and practice of quantum control enable robust and che...
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Optimal control of quantum systems with SU(1, 1) dynamical symmetry
SU(1, 1) dynamical symmetry is of fundamental importance in analyzing unbounded quantum systems in theoretical and applied physics. In this paper, we study the control of generalized coherent states associated...
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Witnessing the boundary between Markovian and non-Markovian quantum dynamics: a Green’s function approach
This paper presents a Green’s function-based root locus method to investigate the boundary between Markovian and non-Markovian open quantum systems in the frequency domain. A Langevin equation for the boson-bo...
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Multiple independent quantum states sharing under collaboration of agents in quantum networks
This paper presents a systematic approach for implementing arbitrary unknown multi-qubit state sharing by multiple agents and its generalization to independent state joint sharing collaborated with multi contr...
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Open AccessPreface
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Open AccessControl problems in quantum systems
The past decade or two has witnessed tremendous progress in theory and practice of quantum control technologies. Bridging different scientific disciplines ranging from fundamental particle physics to nanotechn...
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Quantum state transformation by optimal projective measurements
This paper explores the optimal control of quantum state transformations in finite-dimensional quantum systems by a sequence of non-selective projective measurements. In our schemes, the projectors of each mea...
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Feedback control of nonlinear differential algebraic systems using Hamiltonian function method
The stabilization and H ∞ control of nonlinear differential algebraic systems (NDAS) are investigated using the Hamiltonian function method. Firstly, we put forward a novel dissipative Hamiltonian...