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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Cooperation between Coherent Control and Noises in Quantum Metrology
量子计量 相干控制 噪声
2023/11/7
In this work, the cooperation between coherent control and noises in open spin systems is studied, aiming to demonstrate that such cooperation can provide new possibilities for parametrization in quan...
Breakthrough in particle control creates special half-vortex rotation
creates special half-vortex rotation
2015/3/18
Researchers at the Universities of Strathclyde and Pittsburgh, and Princeton University, conducted a test in which they were able to arrange the particles into a ‘ring geometry’ form in a solid-state ...
Quantum Zeno-based control mechanism for molecular fragmentation
Quantum Zeno-based molecular fragmentation mechanism
2011/9/14
Within a scenario grounded on the quantum Zeno effect, a quantum control mechanism is proposed for molecular fragmentation processes. In particular, we focus on the van der Waals Ne-Br2 complex, which...
Sistemas de Lie y sus aplicaciones en Fisica y Teoria de Control
Lie systems Control Theory Mathematical Physics
2011/7/26
Sistemas de Lie y sus aplicaciones en Física y Teoría de Control.
Control for Schroedinger operators on tori
Schroedinger operator Jaffard states Systems and Control
2011/7/27
Abstract: A well known result of Jaffard states that an arbitrary region on a torus controls, in the L2 sense, solutions of the free stationary and dynamical Schroedinger equations. In this note we sh...
Unified analysis of terminal-time control in classical and quantum systems
unified analysis terminal-time control classical and quantum systems
2010/11/8
Many phenomena in physics, chemistry, and biology involve seeking an optimal control to maximize an objective for a classical or quantum system which is open and interacting with its environment. The ...
Direct and Indirect Couplings in Coherent Feedback Control of Linear Quantum Systems
Couplings Coherent Feedback Control Linear Quantum Systems
2010/11/8
The purpose of this paper is to study and design direct and indirect couplings for use in coherent feedback control of a class of linear quantum stochastic systems. A general physical model for a nomi...
A Quasi-separation Principle and Newton-like Scheme for Coherent Quantum LQG Control
Quasi-separation Principle Newton-like Scheme Coherent Quantum LQG Control
2010/11/5
This paper is concerned with constructing an optimal controller in the coherent quantum Linear Quadratic Gaussian problem. A coherent quantum controller is itself a quantum system and is required to b...
Effects of uncertainties and errors on Lyapunov control
Effects uncertainties errors Lyapunov control
2010/11/4
Lyapunov control (open-loop) is often confronted with uncertainties and errors in practical applications. In this paper, we analyze the robustness of Lyapunov control against the uncertainties and er...
Ultrafast control of inelastic tunneling in a double semiconductor quantum
Ultrafast control inelastic tunneling double semiconductor quantum
2010/11/11
In a semiconductor-based double quantum well (QW) coupled to a degree of freedom with an internal dynamics, we demonstrate that the electronic motion is controllable within femtoseconds by applying ap...
Dynamical cooling of a single-reservoir open quantum system via optimal control
Dynamical cooling single-reservoir quantum system via optimal control
2010/11/9
Based on an exact description of open quantum systems in terms of stochastic Liouville-von Neumann equations optimal control is investigated without rotating-wave or Markovian approximations. Within t...
Suppressing decoherence and improving entanglement by quantum-jump-based feedback control in two-level systems
Suppressing decoherence improving entanglement by quantum-jump-based feedback two-level systems
2010/10/19
We study the quantum-jump-based feedback control on the entanglement shared between two
qubits with one of them subject to decoherence, while the other qubit is under the control. This situation is v...
Sliding Mode Control of Two-Level Quantum Systems
Sliding Mode Control Two-Level Quantum Systems
2010/10/18
This paper proposes a robust control method based on sliding mode design for two-level quantum
systems with bounded uncertainties. An eigenstate of the two-level quantum system is identified as a sli...
Universal quantum control of two-electron spin quantum bits using dynamic nuclear polarization
Universal quantum control two-electron spin quantum bits dynamic nuclear polarization
2010/10/27
One fundamental requirement for quantum computation is to perform universal manipulations
of quantum bits at rates much faster than the qubit’s rate of decoherence. Recently,
fast gate operations ha...
Bang-Bang Control Design for Quantum State Transfer based on Hyperspherical Coordinates and Optimal Time-energy Control
Bang-Bang Control Design Quantum State Transfer Hyperspherical Coordinates Optimal Time-energy Control
2010/10/21
We present a constructive control scheme for solving quantum state engineering problems based on a parametrization of the state vector in terms of complex hyperspherical coordinates. Unlike many contr...