Steady-State Tunable Entanglement Thermal Machine Using Quantum Dots

• URL: http://arxiv.org/abs/2112.12020v1
• Date: Wed, 22 Dec 2021 16:47:01 GMT
• Title: Steady-State Tunable Entanglement Thermal Machine Using Quantum Dots
• Authors: Anuranan Das, Adil Anwar Khan, Sattwik Deb Mishra, Parvinder Solanki, Bitan De, Bhaskaran Muralidharan and Sai Vinjanampathy
• Abstract summary: We present a solid state thermal machine based on quantum dots to generate steady-state entanglement between distant spins. The proposed device also works as an entanglement thermal machine under a temperature gradient that can even give rise to entanglement at zero voltage bias.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We present a solid state thermal machine based on quantum dots to generate steady-state entanglement between distant spins. Unlike previous approaches our system is controlled by experimentally feasible steady state currents manipulated by dc voltages. By analyzing the Liouvillian eigenspectrum as a function of the control parameters, we show that our device operates over a large voltage region. As an extension, the proposed device also works as an entanglement thermal machine under a temperature gradient that can even give rise to entanglement at zero voltage bias. Finally, we highlight a post-selection scheme based on currently feasible non-demolition measurement techniques that can generate perfect Bell-pairs from the steady state output of our thermal machine.

Related papers

• 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)
• Steady-state entanglement production in a quantum thermal machine with continuous feedback control [0.0]
  We study entanglement generation in a two-qubit quantum thermal machine in the presence of a continuous feedback protocol. We show that there exists an ideal operation regime where the quality of entanglement is significantly improved.
  arXiv  Detail & Related papers  (2023-09-14T13:15:45Z)
• Unconditional Wigner-negative mechanical entanglement with linear-and-quadratic optomechanical interactions [62.997667081978825]
  We propose two schemes for generating Wigner-negative entangled states unconditionally in mechanical resonators. We show analytically that both schemes stabilize a Wigner-negative entangled state that combines the entanglement of a two-mode squeezed vacuum with a cubic nonlinearity. We then perform extensive numerical simulations to test the robustness of Wigner-negative entanglement attained by approximate CPE states stabilized in the presence of thermal decoherence.
  arXiv  Detail & Related papers  (2023-02-07T19:00:08Z)
• 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)
• The most accurate quantum thermoelectric [0.0]
  Thermodynamic Uncertainty Relations (TURs) represent a benchmark result in non-equilibrium physics. We rigorously demonstrate that the transmission function which maximizes the reliability of thermoelectric devices is a collection of boxcar functions. This allows us to show that TURs can be violated by arbitrarily large amounts, depending on the temperature and chemical potential gradients.
  arXiv  Detail & Related papers  (2021-06-18T16:18:19Z)
• Taking the temperature of a pure quantum state [55.41644538483948]
  Temperature is a deceptively simple concept that still raises deep questions at the forefront of quantum physics research. We propose a scheme to measure the temperature of such pure states through quantum interference.
  arXiv  Detail & Related papers  (2021-03-30T18:18:37Z)
• Adiabatic Sensing Technique for Optimal Temperature Estimation using Trapped Ions [64.31011847952006]
  We propose an adiabatic method for optimal phonon temperature estimation using trapped ions. The relevant information of the phonon thermal distributions can be transferred to the collective spin-degree of freedom. We show that each of the thermal state probabilities is adiabatically mapped onto the respective collective spin-excitation configuration.
  arXiv  Detail & Related papers  (2020-12-16T12:58:08Z)
• Efficient entanglement of spin qubits mediated by a hot mechanical oscillator [0.0]
  Localized electronic and nuclear spin qubits in the solid state constitute a promising platform for storage and manipulation of quantum information. We propose and analyze a scheme that employs a parity measurement in a decoherence free subspace to enable fast and robust entanglement generation. We find that high-fidelity entanglement at cryogenic and even ambient temperatures is feasible with realistic parameters, and show that the entangled pair can be subsequently leveraged for deterministic controlled-NOT operations.
  arXiv  Detail & Related papers  (2020-11-05T02:30:18Z)
• Shortcuts to Squeezed Thermal States [0.0]
  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.
  arXiv  Detail & Related papers  (2020-08-07T18:00:01Z)
• Mechanical oscillator thermometry in the nonlinear optomechanical regime [0.0]
  We study an undriven optomechanical system via non-Gaussian radiation-pressure interaction. We show that the optical probe gets a nonlinear phase, resulting from the non-Gaussian interaction, and undergoes an incoherent phase diffusion process. To efficiently infer the temperature from the entangled light-matter state, we propose using a nonlinear Kerr medium before a homodyne detector.
  arXiv  Detail & Related papers  (2020-06-11T18:00:04Z)

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.