Journal Article

FZJ-2016-06930

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Multi-Qubit Joint Measurements in Circuit QED: Stochastic Master Equation Analysis

Criger, B. (Corresponding author) ; Ciani, A.FZJ* ; DiVincenzo, D.

2016
Springer Open Berlin

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Please use a persistent id in citations: http://hdl.handle.net/2128/13665  doi:10.1140/epjqt/s40507-016-0044-6

Abstract: We derive a family of stochastic master equations describing homodyne measurement of multi-qubit diagonal observables in circuit quantum electrodynamics. Our approach replaces the polaron-like transformation of previous work, which required a lengthy calculation for the physically interesting case of three qubits and two resonator modes. The technique introduced here makes this calculation straightforward and manifestly correct. Using this technique, we are able to show that registers larger than one qubit evolve under a non-Markovian master equation. We perform numerical simulations of the three-qubit, two-mode case from previous work, obtaining an average post-measurement state fidelity near 94%.

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Contributing Institute(s):

1. Theoretische Nanoelektronik (IAS-3)
2. Theoretische Nanoelektronik (PGI-2)

Research Program(s):

1. 144 - Controlling Collective States (POF3-144) (POF3-144)

Appears in the scientific report 2016

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Database coverage:
; ; ; DOAJ Seal

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