Journal Article

FZJ-2025-04032

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Digital-analog simulations of Schrödinger cat states in the Dicke-Ising model

Shapiro, D. (Corresponding author)FZJ* ; Weber, Y.FZJ* ; Bode, T.FZJ* ; Wilhelm, F. K.FZJ* ; Bagrets, D.FZJ*

2025
Inst. Woodbury, NY

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Please use a persistent id in citations: doi:10.1103/wbp6-y3vd  doi:10.34734/FZJ-2025-04032

Abstract: The Dicke-Ising model, one of the few paradigmatic models of matter-light interaction, exhibits a superradiant quantum phase transition above a critical coupling strength. However, in natural optical systems, its experimental validation is hindered by a “no-go theorem.” Here, we propose a digital-analog quantum simulator for this model based on an ensemble of interacting qubits coupled to a single-mode photonic resonator. We analyze the system's free-energy landscape using field-theoretical methods and develop a digital-analog quantum algorithm that disentangles qubit and photon degrees of freedom through a parity-measurement protocol. This disentangling enables the emulation of a photonic Schrödinger cat state, which is a hallmark of the superradiant ground state in finite-size systems and can be unambiguously probed through the Wigner tomography of the resonator's field.

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Contributing Institute(s):

1. Quantum Computing Analytics (PGI-12)

Research Program(s):

1. 5221 - Advanced Solid-State Qubits and Qubit Systems (POF4-522) (POF4-522)
2. ML4Q - Machine Learning for Quantum (101120240) (101120240)
3. Verbundprojekt: Digital-Analoge Quantencomputer (DAQC) - Teilvorhaben: DAQC Kontrolle, Kalibrierung und Charakterisierung (13N15688) (13N15688)
4. BMBF 13N16149 - QSolid - Quantencomputer im Festkörper (BMBF-13N16149) (BMBF-13N16149)

Appears in the scientific report 2025

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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