Use of dynamical coupling for improved quantum state transfer

Abstract

We propose a method to improve quantum state transfer in transmission lines. The idea is to localize the information on the last qubit of a transmission line, by dynamically varying the coupling constants between the first and the last pair of qubits. The fidelity of state transfer is higher then in a chain with fixed coupling constants. The effect is stable against small fluctuations in the system parameters.

5 pages, 7 figures

References in corpus (3)

• The Propagation of Quantum Information Through a Spin System
• Spin Chains as Perfect Quantum State Mirrors
• Perfect quantum state transfer with randomly coupled quantum chains

Cited by in corpus (9)

• Quantum Communication through Spin Chain Dynamics: an Introductory Overview
• Optimal quantum chain communication by end gates
• Fast, high fidelity information transmission through spin chain quantum wires
• Quantum state transfer and time-dependent disorder in Quantum Chains
• Local control of entanglement in a spin chain
• Adiabatic Quantum Transport in a Spin Chain with a Moving Potential
• Entanglement Resonance in Driven Spin Chains
• Quantum communication via a continuously monitored dual spin chain
• Role of interference in quantum state transfer through spin chains