Tailoring Dynamical Quantum Phase Transitions via Double-Mode Squeezing Manipulation
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arXiv
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| Format: | Preprint |
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2026
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| author | Cao, Kaiyuan Wang, Haodong Jiang, Xiang-Ping chen, Shu Wang, Jian |
| author_facet | Cao, Kaiyuan Wang, Haodong Jiang, Xiang-Ping chen, Shu Wang, Jian |
| contents | We propose a protocol to tailor dynamical quantum phase transitions (DQPTs) by double-mode squeezing onto the initial state in the XY chain. The effect of squeezing depends critically on the system's symmetry and parameters. When the squeezing operator breaks particle-hole symmetry (PHS), DQPTs become highly tunable, allowing one to either induce transitions within a single phase or suppress them. Remarkably, when PHS is preserved and the squeezing strength reaches $r=π/4$, a universal class of DQPTs emerges, independent of the quench path. This universality is characterized by two key features: (i) the collapse of all Fisher zeros onto the real-time axis, and (ii) the saturation of intermode entanglement to its maximum in each $(k,-k)$ modes. Moreover, the critical momenta governing the DQPTs coincide exactly with the modes attaining the maximal entanglement. At this universal point, the dynamical phase vanishes, leading to a purely geometric evolution marked by $π$-jumps in the Pancharatnam geometric phase. Our work establishes initial-state squeezing as a versatile tool for tailoring far-from-equilibrium criticality and reveals a direct link between entanglement saturation and universal nonanalytic dynamics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_03494 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Tailoring Dynamical Quantum Phase Transitions via Double-Mode Squeezing Manipulation Cao, Kaiyuan Wang, Haodong Jiang, Xiang-Ping chen, Shu Wang, Jian Quantum Physics Quantum Gases We propose a protocol to tailor dynamical quantum phase transitions (DQPTs) by double-mode squeezing onto the initial state in the XY chain. The effect of squeezing depends critically on the system's symmetry and parameters. When the squeezing operator breaks particle-hole symmetry (PHS), DQPTs become highly tunable, allowing one to either induce transitions within a single phase or suppress them. Remarkably, when PHS is preserved and the squeezing strength reaches $r=π/4$, a universal class of DQPTs emerges, independent of the quench path. This universality is characterized by two key features: (i) the collapse of all Fisher zeros onto the real-time axis, and (ii) the saturation of intermode entanglement to its maximum in each $(k,-k)$ modes. Moreover, the critical momenta governing the DQPTs coincide exactly with the modes attaining the maximal entanglement. At this universal point, the dynamical phase vanishes, leading to a purely geometric evolution marked by $π$-jumps in the Pancharatnam geometric phase. Our work establishes initial-state squeezing as a versatile tool for tailoring far-from-equilibrium criticality and reveals a direct link between entanglement saturation and universal nonanalytic dynamics. |
| title | Tailoring Dynamical Quantum Phase Transitions via Double-Mode Squeezing Manipulation |
| topic | Quantum Physics Quantum Gases |
| url | https://arxiv.org/abs/2601.03494 |