Macroscopic quantum computation using Bose-Einstein condensates

TL;DR

This paper explores macroscopic quantum computation with Bose-Einstein condensates, leveraging bosonic enhancement to perform faster quantum gates at large energy scales without increasing decoherence, demonstrated through Deutsch's and Grover's algorithms.

Contribution

It introduces a novel scheme for quantum computation using BECs that achieves faster gate operations via bosonic enhancement without decoherence penalties.

Findings

Gate operations at a scale N times faster due to bosonic enhancement

No intrinsic decoherence penalty in the qubit encoding

Successful illustration with Deutsch's and Grover's algorithms

Abstract

Quantum computation using qubits made of two component Bose-Einstein condensates (BECs) is analysed. The use of BECs allows for an increase of energy scales via bosonic enhancement, resulting in gate operations that can be performed at a macroscopically large energy scale. The large energy scale of the gate operations results in quantum algorithms that may be executed at a time reduced by a factor of N, where N is the number of bosons per qubit. The encoding of the qubits allows for no intrinsic penalty on decoherence times. We illustrate the scheme by an application to Deutsch's and Grover's algorithms.