Single-nuclear-spin cavity QED

Journal Article · Tue Jun 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.062308· OSTI ID:21413192

Takeuchi, Makoto; Takei, Nobuyuki; Peng, Zhang ^[1]; Doi, Kodai; Kozuma, Mikio ^[1]; Ueda, Masahito ^[1]

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1. ERATO Macroscopic Quantum Control Project, JST, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656 (Japan)

We constructed a cavity QED system with a diamagnetic atom of {sup 171}Yb and performed projective measurements on a single nuclear spin. Since Yb has no electronic spin and has 1/2 nuclear spin, the procedure of spin polarization and state verification can be dramatically simplified compared with the pseudo-spin-1/2 system. By enhancing the photon emission rate of the {sup 1}S{sub 0}-{sup 3}P{sub 1} transition, projective measurement is implemented for an atom with the measurement time of T{sub meas}=30 {mu}s. Unwanted spin flip and dark counts of the detector lead to systematic error when the present technique is applied for the determination of diagonal elements of an unknown spin state, which is {delta}|{beta}|{sup 2{<=}}2x10{sup -2}. Fast measurement on a long-lived qubit is key to the realization of large-scale one-way quantum computing.

• OSTI ID: 21413192
• Journal Information: Physical Review. A, Vol. 81, Issue 6; Other Information: DOI: 10.1103/PhysRevA.81.062308; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMS
ERRORS
PHOTON EMISSION
QUANTUM COMPUTERS
QUANTUM ELECTRODYNAMICS
SPIN
SPIN FLIP
SPIN ORIENTATION
VERIFICATION
YTTERBIUM 171
ANGULAR MOMENTUM
COMPUTERS
ELECTRODYNAMICS
EMISSION
EVEN-ODD NUCLEI
FIELD THEORIES
INTERMEDIATE MASS NUCLEI
ISOTOPES
NUCLEI
ORIENTATION
PARTICLE PROPERTIES
QUANTUM FIELD THEORY
RARE EARTH NUCLEI
STABLE ISOTOPES
YTTERBIUM ISOTOPES