Relationship between the transverse-field Ising model and the XY model via the rotating-wave approximation

Abstract

In a large transverse field, there is an energy cost associated with flipping spins along the axis of the field. This penalty can be employed to relate the transverse-field Ising model in a large field to the XY model in no field (when measurements are performed at the right stroboscopic times). We describe the details for how this relationship works and, in particular, we also show under what circumstances it fails. We examine wavefunction overlap between the two models and observables, such as spin-spin Green's functions. In general, the mapping is quite robust at short times, but will ultimately fail if the run time becomes too long. There is also a trade-off between the length of time one can run a simulation out to and the time jitter of the stroboscopic measurements that must be balanced when planning to employ this mapping.

(8 pages, 6 figures, typeset with ReVTeX

References in corpus (6)

• Observation of a Discrete Time Crystal
• Observation of a Many-Body Dynamical Phase Transition with a 53-Qubit Quantum Simulator
• Measuring out-of-time-order correlations and multiple quantum spectra in a trapped ion quantum magnet
• Trapped ion quantum computation with transverse phonon modes
• Interferometric probes of many-body localization
• Boson-mediated quantum spin simulators in transverse fields: XY model and spin-boson entanglement

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