Realistic simulations of single-spin nondemolition measurement by magnetic resonance force microscopy

Journal Article · Mon Sep 01 00:00:00 EDT 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.68.032301· OSTI ID:20640145

Brun, Todd A; Goan, Hsi-Sheng ^[1]

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1. Institute for Advanced Study, Einstein Drive, Princeton, New Jersey 08540, USA (United States)

A requirement for many quantum computation schemes is the ability to measure single spins. This paper examines one proposed scheme: magnetic resonance force microscopy (MRFM), including the effects of thermal noise and back action from monitoring. We derive a simplified equation using the adiabatic approximation and produce a stochastic pure state unraveling which is useful for numerical simulations. We also calculate the signal-to-noise ratio for single-spin measurement by MRFM, using a quantum Langevin equation approach.

• OSTI ID: 20640145
• Journal Information: Physical Review. A, Vol. 68, Issue 3; Other Information: DOI: 10.1103/PhysRevA.68.032301; (c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ADIABATIC APPROXIMATION
ATOMIC FORCE MICROSCOPY
COMPUTERIZED SIMULATION
INFORMATION THEORY
LANGEVIN EQUATION
MAGNETIC FIELDS
MAGNETIC RESONANCE
NOISE
QUANTUM MECHANICS
SIGNAL-TO-NOISE RATIO
SPIN
STOCHASTIC PROCESSES