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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Quantum State and Gate Verification with Minimum Settings
最小设置 量子态 门验证
2023/4/14
Efficient verification of quantum states and gates is crucial to the development of quantum technologies. Although the sample complexities of quantum state verification and quantum gate verification h...
Physicists bring human-scale object to near standstill, reaching a quantum state（图）
量子态 引力 原子尺度
2023/6/19
To the human eye, most stationary objects appear to be just that — still, and completely at rest. Yet if we were handed a quantum lens, allowing us to see objects at the scale of individual atoms, wha...
Relativistic Quantum State, Geometric Phase and Dissipationless Spin current
Relativistic Quantum State Geometric Phase Dissipationless Spin current
2011/8/11
Abstract: Spin current of a Dirac particle is shown to be given by the geometric phase and in terms of the later, a closed form expression is obtained for the dissipationlessness of the spin current.
Optimal Quantum State Estimation by No-Signaling Principle
No-Signaling Principle Quantum Physics
2010/11/8
We obtain a simple derivation of the optimal quantum state estimation of a two-level system using the no-signaling principle. In particular, we show that the no-signaling principle determines the uni...
Linearly independent pure-state decomposition and quantum state discrimination
Linearly independent decomposition quantum discrimination
2010/11/8
We put the pure-state decomposition mathematical property of a mixed state to a physical test. We begin by characterizing all the possible decompositions of a rank-two mixed state by means of the comp...
Uncertainty related to position and momentum localization of a quantum state
Uncertainty related position momentum localization quantum state
2010/11/5
This paper presents the uncertainty related to position and momentum localization of a quantum state in terms of entropic uncertainty relations. We slightly improve the inequality given in [Phys. Rev....
Connections of geometric measure of entanglement of pure symmetric states to quantum state estimation
Connections geometric measure entanglement pure symmetric states quantum state estimation
2010/11/5
We study the geometric measure of entanglement (GM) of pure symmetric states related to rank-one positive-operator-valued measures (POVMs) and establish a general connection with quantum state estimat...
Quantum state engineering by a coherent superposition of photon subtraction and addition
Quantum state engineering coherent superposition photon subtraction
2010/10/19
We study a coherent superposition tˆa + rˆa† of field annihilation and creation operator acting on continuous variable systems and propose its application for quantum state engineering...
Combined quantum state preparation and laser cooling of a continuous beam of cold atoms
quantum state preparation laser cooling continuous beam cold atoms
2010/10/21
We propose and solve a simple but very general quantum model of an SU(2)spin interacting with a large external system with N states. The coupling is described by a random hamiltonian in a new general ...
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...
Exhaustive Generation of Orthomodular Lattices with Exactly One Non-Quantum State
Reverse Kochen-Specker theorem Hilbert space orthomodular lattices MMP diagrams Greechie diagrams strong set of states
2010/3/10
We propose a kind of reverse Kochen-Specker theorem that amounts to generating orthomodular lattices (OMLs) with exactly one state that do not admit properties of the Hilbert space. We apply MMP algor...
Quantum state engineering, purification, and number resolved photon detection with high finesse optical cavities
Quantum state high finesse optical
2010/3/10
We propose and analyze a multi-functional setup consisting of high finesse optical cavities, beam splitters, and phase shifters. The basic scheme projects arbitrary photonic two-mode input states onto...
A theory of quantum state reduction is advanced. It is based on two principles: (1) Gauge decomposition; (2) Maximum entropy. To wit: (1) The reduction decomposition of a state vector is the Schmidt d...
Quantum-State Engineering of Multiple Trapped Ions for
Center-of-Mass Mode
center-of-mass mode coherent state
2007/8/15
2001Vol.36No.3pp.335-338DOI:
Quantum-State Engineering of Multiple Trapped Ions for
Center-of-Mass Mode
ZENG Hao-Sheng,1,2 KUANG Le-Man,2 ZHU Xi-Wen1 and GAO Ke-Lin1
1 L...
A Method for Transferring an Unknown Quantum State and Its Application
transferring unknown quantum state secure direct
communication controlled-not operation
2007/8/15
2007Vol.47No.4pp.629-632DOI:
A Method for Transferring an Unknown Quantum State and Its Application
YAN Feng-Li1,2 and HUO Hai-Rui1
1 College of Physics and Informatio...