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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Heisenberg-Pauli-Weyl uncertainty principle based on Phase derivatives
相位导数 Heisenberg Pauli-Weyl不确定性原理
2023/11/13
In this talk we introduce some recent developments of Heisenberg-Pauli-Weyl uncertainty principle in the different settings.
Moving electrons around loops with light:A quantum device based on geometry
Moving electrons loops with light quantum device geometry
2016/3/2
While a classical bit found in conventional electronics exists only in binary one or zero states, the more resourceful quantum bit, or ‘qubit,’ is represented by a vector, pointing to a simultaneous c...
Teleportation-based realization of an optical quantum two-qubit entangling gate
teleportation-based realization optical quantum entangling gate
2010/11/8
In recent years, there has been heightened interest in quantum teleportation, which allows for the transfer of unknown quantum states over arbitrary distances. Quantum teleportation not only serves as...
A realist interpretation of quantum mechanics based on undecidability due to gravity
interpretation quantum based undecidability gravity
2010/11/8
We summarize several recent developments suggesting that solving the problem of time in quantum gravity leads to a solution of the measurement problem in quantum mechanics. This approach has been info...
Quantum memories based on engineered dissipation
Quantum memories based engineered dissipation
2010/11/5
Storing quantum information for long times without disruptions is a major requirement for most quantum information technologies. A very appealing approach is to use self-correcting Hamiltonians, i.e. ...
Insecurity of position-based quantum cryptography protocols against entanglement attacks
Insecurity position-based quantum cryptography protocols entanglement attacks
2010/10/19
Recently, position-based quantum cryptography has been claimed to be unconditionally secure.
On the contrary, here we show that the existing proposals for position-based quantum cryptography are, in ...
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...
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...
Noise resilient quantum interface based on QND interaction
quantum interface Noise resilient quantum-non-demolition interactions
2010/3/10
We propose a quantum interface protocol based on two quantum-non-demolition interactions (QND) arranged either in sequence or in parallel. Since the QND coupling arises naturally in interactions betwe...
Consistency properties of a simulation-based estimator for dynamic processes
Consistency properties simulation-based estimator dynamic processes
2010/4/27
This paper considers a simulation-based estimator for a general class of Markovian processes and explores some strong consistency properties of the estimator. The estimation problem is defined over a ...
Fully automated entanglement-based quantum cryptography system for telecom fiber networks
quantum cryptography system telecom fiber networks
2010/4/8
We present a quantum key distribution (QKD) system based on polarisation entanglement for use in telecom fibers. A QKD exchange up to 50km was demonstrated in the laboratory with a secure key rate of ...
Resources for Measurement-Based Quantum Carry-Lookahead Adder
Measurement-Based Quantum Carry-Lookahead Adder
2010/4/9
We present the design of a quantum carry-lookahead adder using measurement-based quantum computation. QCLA utilizes MBQC`s ability to transfer quantum states in unit time to accelerate addition. The q...
Multi-mode states in decoy-based quantum key distribution protocols
Multi-mode states decoy-based quantum key distribution protocols
2010/4/12
Every security analysis of quantum key distribution (QKD) relies on a faithful modeling of the employed quantum states. Many photon sources, like for instance a parametric down conversion (PDC) source...
Quantum Walk-based Generation of Entanglement Between Two Walkers
Quantum Walk-based Generation Entanglement Two Walkers
2010/4/9
Quantum walks can be used either as tools for quantum algorithm development or as entanglement generators, potentially useful to test quantum hardware. We present a novel algorithm based on a discrete...
A Measurement-Based Form of the Out-of-Place Quantum Carry-Lookahead Adder
Cluster-State Computation Quantum Carry-Lookahead Adder
2010/4/9
We present the design of a quantum carry-lookahead adder using measurement-based quantum computation. The quantum carry-lookahead adder (QCLA) is faster than a quantum ripple-carry adder; QCLA has log...