搜索结果: 1-15 共查到“理学 qubits”相关记录43条 . 查询时间(0.087 秒)
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Tailoring population inversion in Landau-Zener-Stuckelberg interferometry of flux qubits
Tailoring population inversion Landau-Zener-Stuckelberg interferometry flux qubits
2012/2/27
We distinguish different mechanisms for population inversion in flux qubits driven by dc+ac magnetic fields. We show that for driving amplitudes such that there are Landau-Zener-St\"uckelberg interefe...
Complete universal quantum gate set approaching fault-tolerant thresholds with superconducting qubits
Complete universal quantum gate set fault-tolerant thresholds superconducting qubits
2012/2/27
We use quantum process tomography to characterize a full universal set of all-microwave gates on two superconducting single-frequency single-junction transmon qubits. All extracted gate fidelities, in...
Two Local Observables are Sufficient to Characterize Maximally Entangled States of N Qubits
Local Observables Characterize Maximally Entangled States
2010/11/8
Maximally entangled states (MES) represent a valuable resource in quantum information processing. In $N$-qubit systems the MES are $N$-GHZ states, i.e. the collection of $\ket{GHZ_N}=\frac{1}{\sqrt{2}...
Wirebond crosstalk and cavity modes in large chip mounts for superconducting qubits
Wirebond crosstalk cavity modes large chip mounts superconducting qubits
2010/11/25
We analyze the performance of a microwave chip mount that uses
wirebonds to connect the chip and mount grounds. A simple impedance ladder model predicts that transmission crosstalk between two feedli...
Quantitative evaluation of defect-models in superconducting phase qubits
Quantitative evaluation defect-models superconducting phase qubits
2010/11/11
We use high-precision spectroscopy and detailed theoretical modelling to determine the form of the coupling between a superconducting phase qubit and a two-level defect. Fitting the experimental data ...
Interface Between Topological and Superconducting Qubits
Interface Topological Superconducting Qubits
2010/11/11
We propose and analyze an interface between a topological qubit and a superconducting flux qubit. In our scheme, the interaction between Majorana fermions in a topological insulator is coherently cont...
Optimal quantum cloning of orbital angular momentum photon qubits via Hong-Ou-Mandel coalescence
Optimal quantum cloning orbital angular momentum photon via Hong-Ou-Mandel coalescence
2010/11/8
The orbital angular momentum (OAM) of light, associated with a helical structure of the wavefunction, has a great potential for quantum photonics, as it allows attaching a higher dimensional quantum s...
Entanglement of two qubits mediated by one-dimensional plasmonic waveguides
Entanglement two qubits mediated one-dimensional plasmonic waveguides
2010/11/11
We investigate qubit-qubit entanglement mediated by plasmons supported by one-dimensional waveguides. We explore both the situation of spontaneous formation of entanglement from an unentangled state ...
Complete Characterization of the Ground Space Structure of Two-Body Frustration-Free Hamiltonians for Qubits
Ground Space Structure Two-Body Frustration-Free Hamiltonians Qubits
2010/11/5
The problem of finding the ground state of a frustration-free Hamiltonian carrying only two-body interactions between qubits is known to be solvable in polynomial time. It is also shown recently that,...
Reexamination of determinant-based separability test for two qubits
Reexamination determinant-based separability qubits
2010/10/29
It was shown in [Augusiak et al.,\;Phys. Rev. A \textbf{77}, 030301(R) (2008)] that discrimination between entanglement and separability in a two qubit state can be achieved by a measurement of a sin...
Time-optimal CNOT between indirectly coupled qubits in a linear Ising chain
Time-optimal CNOT indirectly coupled qubits linear Ising chain
2010/10/21
We give analytical solutions for the time-optimal synthesis of entangling gates between indirectly coupled qubits 1 and 3 in a linear spin chain of three qubits subject to an Ising Hamiltonian interac...
Divergences in the 2-qubits' space: Werner and Thermal states
Jensen-Shannono divergence Heisenberg model
2010/9/13
We revisit the notion of using divergences, or relative-entropies, as measures of the distance between two mixed states, with special emphasis on power-law entropies. We analyze the Csisz´ar and...
Three qubits in a symmetric environment: dissipatively generated asymptotic entanglement
Three qubits symmetric environment asymptotic entanglement
2010/10/18
We study the asymptotic entanglement of three identical qubits under the action of a Markovian open system dynamics that does not distinguish them.We show that by adding a completely depolarized qubit...