Spectroscopic Characterization of the Quantum Linear-Zigzag Transition in Trapped Ions

• URL: http://arxiv.org/abs/2206.00490v1
• Date: Wed, 1 Jun 2022 13:43:25 GMT
• Title: Spectroscopic Characterization of the Quantum Linear-Zigzag Transition in Trapped Ions
• Authors: J. Zhang, B. T. Chow, S. Ejtemaee and P. C. Haljan
• Abstract summary: We realize the quantum version of the linear-zigzag structural transition for arrays of up to five ground state-cooled ions held in a linear Paul trap. We demonstrate several of the control requirements towards entangled-state interferometry near the critical point.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: While engineered quantum systems are a general route to the manipulation of multipartite quantum states, access in a physical system to a continuous quantum phase transition under sufficient control offers the possibility of an intrinsic source of entangled states. To this end we realize the quantum version of the linear-zigzag structural transition for arrays of up to five ground state-cooled ions held in a linear Paul trap and we demonstrate several of the control requirements towards entangled-state interferometry near the critical point. Using in-situ spectroscopy we probe the energy level structure and occupation of the soft mode associated with the structural transition, and show a stable critical point and majority ground state occupation crossing the transition. We resolve biases arising from trap electrode asymmetries that change the nature of the transition, show that they can be suppressed by varying the ion number, and demonstrate control of the transition bias using optical dipole forces.

Related papers

• The multi-state geometry of shift current and polarization [44.99833362998488]
  We employ quantum state projectors to develop an explicitly gauge-invariant formalism. We provide a simple expression for the shift current that resolves its precise relation to the moments of electronic polarization. We reveal its decomposition into the sum of the skewness of the occupied states and intrinsic multi-state geometry.
  arXiv  Detail & Related papers  (2024-09-24T18:00:02Z)
• Concomitant Entanglement and Control Criticality Driven by Collective Measurements [0.0]
  We study Adaptive quantum circuits where a quantum many-body state is controlled using measurements and conditional unitary operations. We find two types of nonequilibrium quantum phase transitions: measurement-induced transitions between volume- and area-law-entangled steady states and control-induced transitions where the system falls into an absorbing state. We attribute this feature and the apparent coincidence of the control and entanglement transitions to the global nature of the control.
  arXiv  Detail & Related papers  (2024-09-10T18:00:03Z)
• Controlling measurement induced phase transitions with tunable detector coupling [44.99833362998488]
  We study the evolution of a quantum many-body system driven by two competing measurements. We employ a positive operator-valued measurement with variable coupling between the system and detector.
  arXiv  Detail & Related papers  (2024-04-11T17:02:58Z)
• Adiabatic State Preparation in a Quantum Ising Spin Chain [32.352947507436355]
  We report on adiabatic state preparation in the one-dimensional quantum Ising model using ultracold bosons in a tilted optical lattice. We observe enhanced fluctuations around the transition between paramagnetic and antiferromagnetic states, marking the precursor of quantum critical behavior.
  arXiv  Detail & Related papers  (2024-04-11T05:27:40Z)
• Equivariant Variational Quantum Eigensolver to detect Phase Transitions through Energy Level Crossings [0.0]
  We introduce an equivariant quantum circuit that preserves the total spin and the translational symmetry to accurately describe singlet and triplet excited states. We also assess the impact of noise on the variational state, showing that conventional mitigation techniques like Zero Noise Extrapolation reliably restore its physical properties.
  arXiv  Detail & Related papers  (2024-03-11T18:51:57Z)
• Reversible phasonic control of a quantum phase transition in a quasicrystal [0.0]
  We show that periodic driving can tune the quasistatic properties of quantum matter. We illuminate a connection between Aubry-Andr'e localization in one dimension and dynamic localization in the associated two-dimensional Harper-Hofstadter model.
  arXiv  Detail & Related papers  (2023-12-02T00:20:23Z)
• Multicritical dissipative phase transitions in the anisotropic open quantum Rabi model [0.7499722271664147]
  We investigate the nonequilibrium steady state of the anisotropic open quantum Rabi model. We find a rich phase diagram resulting from the interplay between the anisotropy and the dissipation. Our study enlarges the scope of critical phenomena that may occur in finite-component quantum systems.
  arXiv  Detail & Related papers  (2023-11-19T15:13:57Z)
• Dipolar quantum solids emerging in a Hubbard quantum simulator [45.82143101967126]
  Long-range and anisotropic interactions promote rich spatial structure in quantum mechanical many-body systems. We show that novel strongly correlated quantum phases can be realized using long-range dipolar interaction in optical lattices. This work opens the door to quantum simulations of a wide range of lattice models with long-range and anisotropic interactions.
  arXiv  Detail & Related papers  (2023-06-01T16:49:20Z)
• Multipartite Entanglement in the Measurement-Induced Phase Transition of the Quantum Ising Chain [77.34726150561087]
  External monitoring of quantum many-body systems can give rise to a measurement-induced phase transition. We show that this transition extends beyond bipartite correlations to multipartite entanglement.
  arXiv  Detail & Related papers  (2023-02-13T15:54:11Z)
• Observing a Topological Transition in Weak-Measurement-Induced Geometric Phases [55.41644538483948]
  Weak measurements in particular, through their back-action on the system, may enable various levels of coherent control. We measure the geometric phases induced by sequences of weak measurements and demonstrate a topological transition in the geometric phase controlled by measurement strength. Our results open new horizons for measurement-enabled quantum control of many-body topological states.
  arXiv  Detail & Related papers  (2021-02-10T19:00:00Z)
• Universality of entanglement transitions from stroboscopic to continuous measurements [68.8204255655161]
  We show that the entanglement transition at finite coupling persists if the continuously measured system is randomly nonintegrable. This provides a bridge between a wide range of experimental settings and the wealth of knowledge accumulated for the latter systems.
  arXiv  Detail & Related papers  (2020-05-04T21:45:59Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.