Related papers: Shortcuts to Squeezed Thermal States

Shortcuts to Squeezed Thermal States

URL: http://arxiv.org/abs/2008.03307v3
Date: Tue, 27 Apr 2021 14:35:15 GMT
Title: Shortcuts to Squeezed Thermal States
Authors: L\'eonce Dupays and Aur\'elia Chenu
Abstract summary: We focus on two techniques to drive an initial thermal state into a final squeezed thermal state. The protocols are designed through reverse engineering for both unitary and open dynamics. Control of the dissipation is achieved using processes, readily implementable via, e.g., continuous quantum measurements.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Squeezed state in harmonic systems can be generated through a variety of techniques, including varying the oscillator frequency or using nonlinear two-photon Raman interaction. We focus on these two techniques to drive an initial thermal state into a final squeezed thermal state with controlled squeezing parameters -- amplitude and phase -- in arbitrary time. The protocols are designed through reverse engineering for both unitary and open dynamics. Control of the dissipation is achieved using stochastic processes, readily implementable via, e.g., continuous quantum measurements. Importantly, this allows controlling the state entropy and can be used for fast thermalization. The developed protocols are thus suited to generate squeezed thermal states at controlled temperature in arbitrary time.

Related papers

Squeezed Thermal Reservoir Engineering via Linear Interactions [0.16574413179773761]
We present a versatile method for creating a squeezed thermal reservoir for quantum systems. By coupling the system to a lossy mode within a normal thermal environment, we can emulate the effect of a squeezed reservoir.
arXiv Detail & Related papers (2024-08-28T18:00:01Z)
Characterization and thermometry of dissapatively stabilized steady states [0.0]
We study the properties of dissipatively stabilized steady states of noisy quantum algorithms. We explore the extent to which they can be well approximated as thermal distributions.
arXiv Detail & Related papers (2024-06-03T00:41:37Z)
Thermalization and Criticality on an Analog-Digital Quantum Simulator [133.58336306417294]
We present a quantum simulator comprising 69 superconducting qubits which supports both universal quantum gates and high-fidelity analog evolution. We observe signatures of the classical Kosterlitz-Thouless phase transition, as well as strong deviations from Kibble-Zurek scaling predictions. We digitally prepare the system in pairwise-entangled dimer states and image the transport of energy and vorticity during thermalization.
arXiv Detail & Related papers (2024-05-27T17:40:39Z)
Energy control in a quantum oscillator using coherent control and engineered environment [83.88591755871734]
We develop and analyze a new method for manipulation of energy in a quantum harmonic oscillator using coherent, electromagnetic, field and incoherent control. An approach to coherent and incoherent controls design based on the speed gradient algorithms is proposed. A robustified speed-gradient control algorithm in differential form is also proposed.
arXiv Detail & Related papers (2024-03-25T20:44:46Z)
Real-time quantum dynamics of thermal states with neural thermofields [0.0]
We study the real-time dynamics of thermal states in two dimensions, based on thermofield dynamics, variational Monte Carlo, and neural-network quantum states. We provide predictions of the real-time dynamics on a 6x6 lattice that lies outside the reach of exact simulations.
arXiv Detail & Related papers (2023-09-13T16:23:28Z)
Photoinduced prethermal order parameter dynamics in the two-dimensional large-$N$ Hubbard-Heisenberg model [77.34726150561087]
We study the microscopic dynamics of competing ordered phases in a two-dimensional correlated electron model. We simulate the light-induced transition between two competing phases.
arXiv Detail & Related papers (2022-05-13T13:13:31Z)
Fast Thermalization from the Eigenstate Thermalization Hypothesis [69.68937033275746]
Eigenstate Thermalization Hypothesis (ETH) has played a major role in understanding thermodynamic phenomena in closed quantum systems. This paper establishes a rigorous link between ETH and fast thermalization to the global Gibbs state. Our results explain finite-time thermalization in chaotic open quantum systems.
arXiv Detail & Related papers (2021-12-14T18:48:31Z)
Pulsed multireservoir engineering for a trapped ion with applications to state synthesis and quantum Otto cycles [68.8204255655161]
Reservoir engineering is a remarkable task that takes dissipation and decoherence as tools rather than impediments. We develop a collisional model to implement reservoir engineering for the one-dimensional harmonic motion of a trapped ion. Having multiple internal levels, we show that multiple reservoirs can be engineered, allowing for more efficient synthesis of well-known non-classical states of motion.
arXiv Detail & Related papers (2021-11-26T08:32:39Z)
Observation of Time-Crystalline Eigenstate Order on a Quantum Processor [80.17270167652622]
Quantum-body systems display rich phase structure in their low-temperature equilibrium states. We experimentally observe an eigenstate-ordered DTC on superconducting qubits. Results establish a scalable approach to study non-equilibrium phases of matter on current quantum processors.
arXiv Detail & Related papers (2021-07-28T18:00:03Z)
Population transfer via a finite temperature state [11.304509970862698]
We study quantum population transfer via a common intermediate state initially in thermal equilibrium with a finite temperature $T$. We show that the finite temperature strongly affects the efficiency of the population transfer. In the continuous case, we adapt the thermofield-based chain-mapping matrix product states algorithm to study the time evolution of the system.
arXiv Detail & Related papers (2020-06-03T23:34:16Z)

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