Macroscopic quantum information processing using spin coherent states

Abstract

Previously a new scheme of quantum information processing based on spin coherent states of two component Bose-Einstein condensates was proposed (Byrnes {\it et al.} Phys. Rev. A 85, 40306(R)). In this paper we give a more detailed exposition of the scheme, expanding on several aspects that were not discussed in full previously. The basic concept of the scheme is that spin coherent states are used instead of qubits to encode qubit information, and manipulated using collective spin operators. The scheme goes beyond the continuous variable regime such that the full space of the Bloch sphere is used. We construct a general framework for quantum algorithms to be executed using multiple spin coherent states, which are individually controlled. We illustrate the scheme by applications to quantum information protocols, and discuss possible experimental implementations. Decoherence effects are analyzed under both general conditions and for the experimental implementation proposed.

published in Optics Communication August 2014

References in corpus (8)

• Quantum Computing
• Bose-Einstein condensation of photons in an optical microcavity
• Strong atom-field coupling for Bose-Einstein condensates in an optical cavity on a chip
• Quantum computing with collective ensembles of multi-level systems
• Spin squeezing in a bimodal condensate: spatial dynamics and particle losses
• Quantum Information Processing in Optical Lattices and Magnetic Microtraps
• Theory of single-shot phase contrast imaging in spinor Bose-Einstein condensates
• Integrating cavity quantum electrodynamics and ultracold-atom chips with on-chip dielectric mirrors and temperature stabilization

Cited by in corpus (5)

• Quantum teleportation with identical particles
• Full Bloch sphere teleportation of spinor Bose-Einstein condensates and spin ensembles
• All optical Controlled-NOT quantum gate based on an exciton-polariton circuit
• Quantum feedback control of atomic ensembles and spinor Bose-Einstein condensates
• Ultrafast coherent control of spinor Bose-Einstein condensates using stimulated Raman adiabatic passage