Time-optimal CNOT between indirectly coupled qubits in a linear Ising chain
نویسندگان
چکیده
منابع مشابه
Time Optimal Control of Coupled Qubits Under Non-Stationary Interactions
In this article, we give a complete characterization of all the unitary transformations that can be synthesized in a given time for a system of coupled spin-1/2 in presence of general time varying coupling tensor. Our treatment is quite general and our results help to characterize the reachable set at all times for a class of bilinear control systems with time varying drift and unbounded contro...
متن کاملOptimal control of coupled Josephson qubits
Reprinted with permission. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the Ame...
متن کاملCNOT gate with weakly coupled qubits : Dependence of fidelity on form of interaction
An approach to the construction of the CNOT quantum logic gate for a 4-dimensional coupledqubit model with weak but otherwise arbitrary coupling has been given recently [M. R. Geller et al., Phys. Rev. A 81, 012320 (2010)]. How does the resulting fidelity depend on the form of qubit-qubit coupling? In this paper we calculate intrinsic fidelity curves (fidelity in the absence of decoherence vers...
متن کاملGeneration of high-fidelity CNOT logic gates by coupled superconducting qubits
Building on the previous results of the Weyl chamber steering method, we demonstrate how to generate high-fidelity CNOT by direct application of certain, physically relevant Hamiltonians with fixed coupling constants containing Rabi terms. Such Hamiltonians are often used to describe two superconducting qubits driven by local rf-pulses. It is found that in order to achieve 100% fidelity in a sy...
متن کاملThe Quantum Gate Design Metric
What is the time-optimal way of realizing quantum operations? Here, we show how important instances of this problem can be related to the study of shortest paths on the surface of a sphere under a special metric. Specifically, we provide an efficient synthesis of a controlled NOT (CNOT) gate between qubits (spins 1 2 ) coupled indirectly via Ising-type couplings to a third spin. Our implementat...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Physics A: Mathematical and Theoretical
سال: 2011
ISSN: 1751-8113,1751-8121
DOI: 10.1088/1751-8113/44/14/145302