Robust CNOT gates from almost any interaction

Abstract

There are many cases where the interaction between two qubits is not precisely known, but single qubit operations are available. In this paper we show how, regardless of an incomplete knowledge of the strength or form of the interaction between two qubits, it is often possible to construct a CNOT gate which has arbitrarily high fidelity. In particular, we show that oscillations in the strength of the exchange interaction in solid state Si and Ge structures are correctable.

5 pages, 2 figures

References in corpus (2)

• Arbitrarily accurate composite pulses
• Robust Ising Gates for Practical Quantum Computation

Cited by in corpus (5)

• Dynamical Quantum Error Correction of Unitary Operations with Bounded Controls
• A precise CNOT gate in the presence of large fabrication induced variations of the exchange interaction strength
• Single-step controlled-NOT logic from any exchange interaction
• On Binomial Summations and a Generalised Quantum SWAP Gate
• On interchanging the states of a pair of qudits