搜索结果: 1-15 共查到“理论物理学 qubit”相关记录43条 . 查询时间(0.108 秒)
Solitons in Maximally Entangled Two Qubit Phase Space
Maximally Entangled Two Qubit Phase Space Quantum Physics
2011/9/29
Abstract: Motivated by M\"obius transformation for symmetrical points under the generalized circle in complex plane, the system of symmetrical spin coherent states corresponding to antipodal qubit sta...
Operational Entanglement Families of Symmetric Mixed N-Qubit States
Operational Entanglement Symmetric Mixed N-Qubit States
2010/11/8
We introduce an operational entanglement classification of symmetric mixed states for an arbitrary number of qubits under stochastic local operations and classical communication (SLOCC). We define fam...
Designing reservoirs for 1/t decoherence of a qubit
reservoirs decoherence Quantum Physics
2010/11/8
Anomalous decoherence in the Jaynes-Cummings model emerges for a certain class of bosonic reservoirs, described by spectral densities with a band edge frequency coinciding with the qubit transition fr...
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...
Motion of electrons can influence their spins through a fundamental effect called spin-orbit interaction. This interaction provides a way to electrically control spins and as such lies at the foundati...
Controlling qubit arrays with anisotropic XXZ Heisenberg interaction by acting on a single qubit
Controlling qubit arrays anisotropic XXZ Heisenberg interaction acting single qubit
2010/11/9
We investigate anisotropic $XXZ$ Heisenberg spin-1/2 chains with control fields acting on one of the end spins, with the aim of exploring local quantum control in arrays of interacting qubits. In this...
Dynamics of a qubit coupled to a dissipative nonlinear quantum oscillator: an effective bath approach
Dynamics qubit coupled dissipative nonlinear quantum oscillator effective bath approach
2010/11/8
We consider a qubit coupled to a nonlinear quantum oscillator, the latter coupled to an Ohmic bath, and investigate the qubit dynamics. This composed system can be mapped onto that of a qubit coupled...
Mimicking the probability distribution of a two-dimensional Grover walk with a single-qubit coin
Mimicking the probability distribution two-dimensional Grover walk single-qubit coin
2010/11/5
Multi-dimensional quantum walks usually require large coin spaces. Here we show that the non-localized case of the spatial density probability of the two-dimensional Grover walk can be obtained using ...
Dispersive readout scheme for a Josephson phase qubit
Dispersive readout scheme Josephson phase qubit
2010/11/9
We present experimental results on a dispersive scheme for reading out a Josephson phase qubit. A capacitively shunted dc-SQUID is used as a nonlinear resonator which is inductively coupled to the qub...
The time evolution of a qubit, consisting of two single-level quantum dots, is studied in the
presence of telegraph noise. The dots are connected by two tunneling paths, with an Aharonov-
Bohm flux ...
Optimal Entanglement Transformations Among N-qubit W-Class States
Optimal Entanglement Transformations N-qubit W-Class States
2010/10/19
We investigate the physically allowed probabilities for transforming one N-partite W-class state to another by means of local operations assisted with classical communication (LOCC). Recently,Kintas a...
Protecting unknown two-qubit entangled states by nesting Uhrig's dynamical decoupling sequences
unknown two-qubit entangled states Uhrig's dynamical decoupling sequences
2010/10/18
Future quantum technologies rely heavily on the possibility of high-efficiency protection of quan-tum entanglement against environment-induced decoherence. A recent study showed that an exten-sion of ...
Teleportation via a mixture of a two qubit subsystem of a N-qubit W and GHZ state
Teleportation two qubit subsystem N-qubit W GHZ state
2010/4/9
In this work we study a state which is a random mixture of a two qubit subsystem of a $N$-qubit W state and GHZ state. We analyze several possibilities like separability criterion (Peres-Horodecki cri...
Svetlichny's inequality and genuine tripartite nonlocality in three-qubit pure states
Svetlichny's inequality genuine tripartite nonlocality three-qubit pure states
2010/4/7
The violation of the Svetlichny's inequality (SI) [Phys. Rev. D, 35, 3066 (1987)] is sufficient but not necessary for genuine tripartite nonlocal correlations. Here we quantify the relationship betwee...
Entanglement Generation by a Three-Dimensional Qubit Scattering: Concurrence vs. Path (In)Distinguishability
Entanglement Generation Three-Dimensional Qubit Scattering Concurrence vs. Path(In)Distinguishability
2010/4/8
A scheme for generating an entangled state in a two spin-1/2 system by means of a spin-dependent potential scattering of another qubit is presented and analyzed in three dimensions. The entanglement i...