Interaction-induced transition in quantum many-body detection probability

التفاصيل البيبلوغرافية
العنوان:	Interaction-induced transition in quantum many-body detection probability
المؤلفون:	Purkayastha, Archak, Imparato, Alberto
سنة النشر:	2023
المجموعة:	Condensed Matter Quantum Physics
مصطلحات موضوعية:	Quantum Physics, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Statistical Mechanics
الوصف:	With the advent of digital and analog quantum simulation experiments, it is now possible to experimentally simulate dynamics of quantum many-body lattice systems and make site-resolved measurements. These experiments make it pertinent to consider the probability of getting any specific measurement outcome, which we call the `signal', on placing multiple detectors at various sites while simulating dynamics of a quantum many-body lattice system. In this work, we formulate and investigate this problem, introducing the concept of quantum many-body detection probability (QMBDP), which refers to the probability of detecting a chosen signal at least once in a given time. We show that, on tuning some Hamiltonian parameters, there can be sharp transition from a regime where QMBDP $\approx 1$, to a regime, where QMBDP $\approx 0$. Most notably, the effects of such a transition can be observed at a single trajectory level. This is not a measurement-induced transition, but rather a non-equilibrium transition reflecting opening of a specific type of gap in the many-body spectrum. We demonstrate this in a single-impurity non-integrable model, where changing the many-body interaction strength brings about such a transition. Our findings suggest that instead of measuring expectation values, single-shot stroboscopic measurements could be used to observe non-equilibrium transitions.
نوع الوثيقة:	Working Paper
DOI:	10.1103/PhysRevA.109.L020202
URL الوصول:	http://arxiv.org/abs/2306.01586
رقم الأكسشن:	edsarx.2306.01586
قاعدة البيانات:	arXiv

الوصف
DOI:	10.1103/PhysRevA.109.L020202