Quantum-circuit guide to optical and atomic interferometry

OPTICS COMMUNICATIONS

卷:283

Article

Caves, Carlton M.¹  Shaji, Anil² 

[1] Univ New Mexico, Ctr Quantum Informat & Control, Albuquerque, NM 87131 USA

[2] Indian Inst Sci Educ & Res, Thiruvananthapuram 695016, Kerala, India

关键词: Interferometry;    Phase estimation;    Quantum circuits;    Disentanglement;   

DOI  :  10.1016/j.optcom.2009.10.065

来源: Elsevier

【 摘 要 】

Atomic (qubit) and optical or microwave (modal) phase-estimation protocols are placed on the same footing in terms of quantum-circuit diagrams. Circuit equivalences are used to demonstrate the equivalence of protocols that achieve the Heisenberg limit by employing entangled superpositions of Fock states, such as NOON states. The key equivalences are those that disentangle a circuit so that phase information is written exclusively on a mode or modes or on a qubit. The Fock-state-superposition phase-estimation circuits are converted to use entangled coherent-state superpositions: the resulting protocols are more amenable to realization in the lab, particularly in a qubit/cavity setting at microwave frequencies. (C) 2009 Elsevier B.V. All rights reserved.

【 授权许可】

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