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High Fidelity Quantum Gates for Trapped Ions under Micromotion
High Fidelity Quantum Gate Trapped Ions Micromotion
2016/1/22
Two- or three-dimensional Paul traps can confine a large number of ions forming a Wigner crystal, which would provide an ideal architecture for scalable quantum computation except for the micromotion,...
Increasing Average Fidelity by Using Non-Maximally Entangled Resource in Teleportation of Superposed Coherent States
Quantum teleportation Superposed coherent state Entangled coherent state Average Fidelity
2011/8/17
Abstract: We consider the problem of teleporting superposed coherent state using non-maximally entangled coherent state as quantum channel and study the effect of entanglement over quality of teleport...
Transition Probability (Fidelity) and Its Relatives
Transition Probability Its Relatives Quantum Physics
2011/7/27
Abstract: Transition Probability (fidelity) for pairs of density operators can be defined as "functor" in the hierarchy of "all" quantum systems and also within any quantum system. The introduction of...
Spin Fidelity for Three-qubit Greenberger-Horne-Zeilinger and W States Under Lorentz Transformations
Spin Fidelity Three-qubit Greenberger-Horne-Zeilinger W States Under Lorentz Transformations
2010/11/8
Constructing the reduced density matrix for a system of three massive spin$-\frac{1}{2}$ particles described by a wave packet with Gaussian momentum distribution and a spin part in the form of GHZ or ...
Information, fidelity, and reversibility in photodetection processes
Information fidelity reversibility photodetection processes
2010/11/8
Four types of photon counters are discussed in terms of information, fidelity, and physical reversibility: conventional photon counter, quantum counter, and their quantum nondemolition (QND) versions...
We study quantum fidelity, the overlap between two ground states of a many-body system, focusing on the thermodynamic regime. We present novel analytical results for quantum fidelity of the Ising chai...
Strong entanglement causes low gate fidelity in inaccurate one-way quantum computation
one-way quantum computation Strong entanglement low gate fidelity
2010/3/10
We study how entanglement among the register qubits affects the gate fidelity in the one-way quantum computation if a measurement is inaccurate. We show that the mean gate fidelity is upper bounded by...
Quantum Corrections to Fidelity Decay in Chaotic Systems
Fidelity Decay Quantum Corrections Chaotic Systems
2010/4/8
By considering correlations between classical orbits we derive semiclassical expressions for the decay of the quantum fidelity amplitude for classically chaotic quantum systems, as well as for its squ...
High fidelity transport of trapped-ion qubits through an X-junction trap array
High fidelity transport of trapped-ion qubits through an X-junction trap array
2010/4/7
We report reliable transport of 9Be+ ions through a 2-D trap array that includes a separate loading/reservoir zone and an "X-junction". During transport the ion's kinetic energy in its local well incr...
Fidelity in topological quantum phases of matter
Fidelity topological quantum phases of matter
2010/4/16
Quantum phase transitions that take place between two distinct topological phases remain an unexplored area for the applicability of the fidelity approach. Here, we apply this method to spin systems i...
Berry Phase and Fidelity in the Dicke model with $A^{2}$ term
Berry Phase Fidelity Dicke model with $A^{2}$ term
2010/4/8
The instability, so-called the quantum-phase-like transition, in the Dicke model with a rotating-wave approximation for finite $N$ atoms is investigated in terms of the Berry phase and the fidelity. I...
Fidelity of Interference Between Two Bose-Einstein Condensates
with Collision and Dissipation
fidelity interference Bose-Einstein condensate
collision dissipation
2007/8/15
2002Vol.38No.2pp.221-223DOI:
Fidelity of Interference Between Two Bose-Einstein Condensates
with Collision and Dissipation
YU Zhao-Xian1,3 and JIAO Zhi-Yong2,3
1 Theor...
Average Fidelity of Teleportation in Quantum Noise Channel
average fidelity teleportation quantum noise channel Bloch sphere
2007/8/15
2006Vol.45No.5pp.802-806DOI:
Average Fidelity of Teleportation in Quantum Noise Channel
HAO Xiang, ZHANG Rong, and ZHU Shi-Qun
School of Physical Science and Technology,...