Transmon qubits are the predominant element in circuit-based quantum information processing, such as existing quantum computers, due to their controllability and ease of engineering implementation. But more than qubits, transmons are multilevel nonlinear oscillators that can be used to investigate fundamental physics questions. Here, they are explored as simulators of excited state quantum phase transitions (ESQPTs), which are generalizations of quantum phase transitions to excited states. We show that the spectral kissing (coalescence of pairs of energy levels) experimentally observed in the effective Hamiltonian of a driven SNAIL-transmon is an ESQPT precursor. We explore the dynamical consequences of the ESQPT, which include the exponential growth of out-of-time-ordered correlators, followed by periodic revivals, and the slow evolution of the survival probability due to localization. These signatures of ESQPT are within reach for current superconducting circuits platforms and are of interest to experiments with cold atoms and ion traps.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11041765 | PMC |
| http://dx.doi.org/10.1038/s41534-023-00745-1 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Spectral kissing and its dynamical consequences in the squeeze-driven Kerr oscillator.
npj Quantum Inf
July 2023
Department of Physics, University of Connecticut, Storrs, CT 06269 USA.
Transmon qubits are the predominant element in circuit-based quantum information processing, such as existing quantum computers, due to their controllability and ease of engineering implementation. But more than qubits, transmons are multilevel nonlinear oscillators that can be used to investigate fundamental physics questions. Here, they are explored as simulators of excited state quantum phase transitions (ESQPTs), which are generalizations of quantum phase transitions to excited states.
View Article and Find Full Text PDFPhase-space topography characterization of nonlinear ultrasound waveforms.
Ultrasonics
March 2018
Civil Engineering Department, New Mexico State University (NMSU), USA.
Fundamental understanding of ultrasound interaction with material discontinuities having closed interfaces has many engineering applications such as nondestructive evaluation of defects like kissing bonds and cracks in critical structural and mechanical components. In this paper, to analyze the acoustic field nonlinearities due to defects with closed interfaces, the use of a common technique in nonlinear physics, based on a phase-space topography construction of ultrasound waveform, is proposed. The central idea is to complement the "time" and "frequency" domain analyses with the "phase-space" domain analysis of nonlinear ultrasound waveforms.
View Article and Find Full Text PDFType II Macular Telangiectasia Presenting as Bilateral Retinochoroidal Anastomosis.
Optom Vis Sci
October 2016
*MD†MSStanley M. Truhlsen Eye Institute, University of Nebraska Medical Center, Omaha, Nebraska(AA); Eye Clinic, Department of Biomedical and Clinical Science, Luigi Sacco Hospital, University of Milan, Milano, Italy(AI); Center for Sight, Safdarjung Enclave, New Delhi, India(NK); and Department of Ophthalmology, Advanced Eye Centre, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India(RS).
Purpose: Retinochoroidal anastamosis (RCA) is known to be associated with retinal angiomatous proliferans rather than idiopathic macular telangiectasia. The case report describes a rare association of bilateral RCA with type II idiopathic macular telangiectasia in an elderly woman.
Case Report: A 65-year-old female patient presented with decreased vision in both eyes to the ophthalmology clinic.
Detection of defect parameters using nonlinear air-coupled emission by ultrasonic guided waves at contact acoustic nonlinearities.
Ultrasonics
December 2015
Wave Propagation and Signal Processing Research Group, KU Leuven Kulak, E. Sabbelaan 53, 8500 Kortrijk, Belgium. Electronic address:
Interaction of ultrasonic guided waves with kissing bonds (closed delaminations and incipient surface breaking cracks) gives rise to nonlinear features at the defect location. This causes higher harmonic frequency ultrasonic radiation into the ambient air, often referred to as Nonlinear Air-Coupled Emission (NACE), which may serve as a nonlinear tag to detect the defects. This paper summarizes the results of a numerical implementation and simulation study of NACE.
View Article and Find Full Text PDFLongitudinal anatomical response of retinal-choroidal anastomosis to anti-vascular endothelial growth factor therapy.
Retina
March 2012
Department of Ophthalmology, University of Paris XII, Centre Hospitalier Intercommunal de Creteil, Creteil, France.
Purpose: To evaluate the longitudinal anatomical response of retinal-choroidal anastomosis (RCA) to intravitreal ranibizumab injection using spectral-domain optical coherence tomography (SD-OCT).
Methods: We reviewed the medical records of 21 consecutive patients with RCA who underwent intravitreal ranibizumab injections at the University Eye Clinic of Creteil between January 2009 and June 2010. The SD-OCT features at baseline, at 3 months, and at 12 months were retrospectively analyzed.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!