Entangling unstable optically active matter qubits

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.060303· OSTI ID:21550012

Matsuzaki, Yuichiro; Fitzsimons, Joseph ^[1]; Benjamin, Simon C ^[1]

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1. Department of Materials, University of Oxford, Oxford OX1 3PH (United Kingdom)

In distributed quantum computation, small devices composed of a single or a few qubits are networked together to achieve a scalable machine. Typically, there is an optically active matter qubit at each node, so that photons are exploited to achieve remote entanglement. However, in many systems the optically active states are unstable or poorly defined. We report a scheme to perform a high-fidelity entanglement operation even given severe instability. The protocol exploits the existence of optically excited states for phase acquisition without actually exciting those states; it functions with or without cavities and does not require number-resolving detectors.

• OSTI ID: 21550012
• Journal Information: Physical Review. A, Vol. 83, Issue 6; Other Information: DOI: 10.1103/PhysRevA.83.060303; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CAVITIES
EQUIPMENT
EXCITED STATES
OPTICAL ACTIVITY
PHOTONS
QUANTUM COMPUTERS
QUANTUM ENTANGLEMENT
QUBITS
BOSONS
COMPUTERS
ELEMENTARY PARTICLES
ENERGY LEVELS
INFORMATION
MASSLESS PARTICLES
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
QUANTUM INFORMATION