Thermodynamics of the optical pumping process in Nitrogen-Vacancy centers
- URL: http://arxiv.org/abs/2503.08769v1
- Date: Tue, 11 Mar 2025 18:00:01 GMT
- Title: Thermodynamics of the optical pumping process in Nitrogen-Vacancy centers
- Authors: Ivan Medina, Sérgio R. Muniz, Elisa I. Goettems, Diogo O. Soares-Pinto,
- Abstract summary: We show that the polarization of the electronic spin depends on the amount of work that is provided to the system by the laser pump.<n>We demonstrate that the entropy can be separated into two contributions: one due to the heat produced and the other due to the work provided.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: The optical pumping process is a fundamental tool for quantum protocols using the electronic and nuclear spins in the Nitrogen-Vacancy (NV) centers platform. In this work, we explore the process of electronic spin polarization through optical pumping from a thermodynamic perspective. We identify the sources of work and heat and show that the heat current is direct related to the experimentally accessible fluorescence of the NV center. We also show that the polarization of the electronic spin depends on the amount of work that is provided to the system by the laser pump. Moreover, we study the von Neumann entropy change in the process. We demonstrate that the entropy can be separated into two contributions: one due to the heat produced and the other due to the work provided, which is a consequence of the non-unitary nature of the pumping process. Finally, we show that increasing the power of the laser results in the increasing of the entropy of the final state, which hinders the polarization efficiency.
Related papers
- A novel scheme for modelling dissipation or thermalization in open quantum systems [0.0]
We introduce a novel method for investigating dissipation (gain) and thermalization in an open quantum system.
To demonstrate the efficiency and significance of the method, we apply it to some ubiquitous open quantum systems.
arXiv Detail & Related papers (2024-04-16T05:20:30Z) - Quantum entropy evolution in the photovoltaic process of a quantum dot
photocell [0.0]
We explore the dynamic quantum entropy-related parameters during the photovoltaic output using a double quantum dot (DQD) photocell model.
The findings demonstrate that the dynamic photovoltaic performance is compatible with quantum entropy-related parameters with varying tunneling coupling strengths.
Some thermodynamic criteria may be used to evaluate the photovoltaic process in this proposed photocell model.
arXiv Detail & Related papers (2024-02-08T14:01:40Z) - Thermodynamics of adiabatic quantum pumping in quantum dots [50.24983453990065]
We consider adiabatic quantum pumping through a resonant level model, a single-level quantum dot connected to two fermionic leads.
We develop a self-contained thermodynamic description of this model accounting for the variation of the energy level of the dot and the tunnelling rates with the thermal baths.
arXiv Detail & Related papers (2023-06-14T16:29:18Z) - Quantum field heat engine powered by phonon-photon interactions [58.720142291102135]
We present a quantum heat engine based on a cavity with two oscillating mirrors.
The engine performs an Otto cycle during which the walls and a field mode interact via a nonlinear Hamiltonian.
arXiv Detail & Related papers (2023-05-10T20:27:15Z) - Dynamical nuclear polarization for dissipation-induced entanglement in
NV centers [18.363222978508052]
We propose a two-qubit entanglement engine which denotes a scheme to generate quantum correlations through purely dissipative processes.
On a diamond platform, the electron spin transitions of two Nitrogen-Vacancy (NV) centers play the role of artificial atoms (qubits)
The surrounding Carbon-13 nuclear spins act as spin baths playing the role of thermal reservoirs at well-defined temperatures and exchanging heat through the NV center qubits.
arXiv Detail & Related papers (2023-01-30T17:25:13Z) - Light-matter entanglement after above-threshold ionization processes in
atoms [0.0]
We study the entanglement between light and electrons generated in above-threshold ionization process.
The amount of entanglement has been studied in terms of the entropy of entanglement.
We use the Wigner function of the driving field mode to motivate the entanglement characterization.
arXiv Detail & Related papers (2022-08-10T09:57:22Z) - Self-oscillating pump in a topological dissipative atom-cavity system [55.41644538483948]
We report on an emergent mechanism for pumping in a quantum gas coupled to an optical resonator.
Due to dissipation, the cavity field evolves between its two quadratures, each corresponding to a different centrosymmetric crystal configuration.
This self-oscillation results in a time-periodic potential analogous to that describing the transport of electrons in topological tight-binding models.
arXiv Detail & Related papers (2021-12-21T19:57:30Z) - Inferring work by quantum superposing forward and time-reversal
evolutions [0.0]
The study of thermodynamic fluctuations allows one to relate the free energy difference between two equilibrium states with the work done on a system.
This finding plays a crucial role in the quantum regime, where the definition of work becomes non-trivial.
We develop a simple interferometric method allowing a direct estimation of the work distribution and the average dissipative work during a driven thermodynamic process.
arXiv Detail & Related papers (2021-07-05T18:06:41Z) - Qubit thermodynamics far from equilibrium: two perspectives about the
nature of heat and work in the quantum regime [68.8204255655161]
We develop an alternative theoretical framework for the thermodynamic analysis of two-level systems.
We observe the appearance of a new term of work, which represents the energy cost of rotating the Bloch vector in presence of the external field that defines the local Hamiltonian.
In order to illustrate our findings we study, from both perspectives, matter-radiation interaction processes for two different systems.
arXiv Detail & Related papers (2021-03-16T09:31:20Z) - Entropy production in the quantum walk [62.997667081978825]
We focus on the study of the discrete-time quantum walk on the line, from the entropy production perspective.
We argue that the evolution of the coin can be modeled as an open two-level system that exchanges energy with the lattice at some effective temperature.
arXiv Detail & Related papers (2020-04-09T23:18:29Z) - Reservoir engineering with arbitrary temperatures for spin systems and
quantum thermal machine with maximum efficiency [50.591267188664666]
Reservoir engineering is an important tool for quantum information science and quantum thermodynamics.
We employ this technique to engineer reservoirs with arbitrary (effective) negative and positive temperatures for a single spin system.
arXiv Detail & Related papers (2020-01-28T00:18:00Z)
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.