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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Does qubit connectivity impact quantum circuit complexity
量子比特连接 量子电路 复杂性
2023/4/13
Some physical implementation schemes of quantum computing -- such as those based on superconducting qubits, quantum dots, and cold atoms -- can apply two-qubit gates only on certain pairs of qubits. O...
Measurement-device-independent Quantum Key Distribution with Uncharacterized Qubit Sources
Measurement-device-independent Quantum Key Distribution Uncharacterized Qubit Sources
2016/1/23
Measurement-device-independent quantum key distribution (MDIQKD) is proposed to be secure against any possible detection attacks. The security of the original proposal relies on the assumption that th...
Resonator-Assisted Quantum Bath Engineering of a Flux Qubit
Resonator-Assisted Quantum Bath Engineering Flux Qubit
2016/1/22
We demonstrate quantum bath engineering for preparation of any orbital state with the controllable phase factor of a superconducting flux qubit assisted by a microwave coplanar waveguide resonator. We...
The exact dynamics of a Jaynes-Cummings model for a qubit interacting with a continuous distribution of bosons, characterized by a special form of the spectral density, is evaluated analytically. The ...
Landau-Zener-Stückelberg Interference of Microwave Dressed States of a Superconducting Phase Qubit
Landau-Zener-Stückelberg Interference Microwave Dressed States Superconducting Phase Qubit
2010/11/11
Dressed state, the eignstate of a combined system of light and matter, has been proposed as fundamental concept to interpret quantum interaction between photons and atoms or molecules. Recently, this...
5-qubit quantum error correction in a charge qubit quantum computer
quantum error correction 5-qubit code solid-state quantum register
2010/11/5
We implement the DiVincenzo-Shor 5 qubit quantum error correcting code into a solid-state quantum register. The quantum register is a multi charge-qubit system in a semiconductor environment, where th...
Optimal measurements to access classical correlations of two-qubit states
Optimal measurements classical correlations two-qubit states
2010/10/19
We analyze the optimal measurements accessing classical correlations in arbitrary two-qubit states.Two-qubit states can be transformed into the canonical forms via local unitary operations. For the ca...
The qubit states decoherence in antiferromagnet-based nuclear spin model of quantum register
Easy-axis antiferromagnet decoherence indirect coupling inhomogeneous magnetic field nu-clear spin quantum register and qubit
2010/3/10
This study deals with the further development of nuclear spin model of scalable quantum register, which presents the one-dimensional chain of the magnetic atoms with nuclear spins 1/2, substituting th...