Hot entanglement? -- Parametrically coupled quantum oscillators in two heat baths: instability, squeezing and driving

• URL: http://arxiv.org/abs/2301.00256v1
• Date: Sat, 31 Dec 2022 17:24:28 GMT
• Title: Hot entanglement? -- Parametrically coupled quantum oscillators in two heat baths: instability, squeezing and driving
• Authors: Onat Ar{\i}soy, Jen-Tsung Hsiang and Bei-Lok Hu
• Abstract summary: Entanglement is a cornerstone of quantum sciences and information processing. Galve et al [Phys. Rev. Lett. textbf105 180501 (2010)] announced that entanglement can be kept at high temperatures. This work probes into the feasibility of hot entanglement' from three aspects listed in the subtitle.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Entanglement being a foundational cornerstone of quantum sciences and the primary resource in quantum information processing, understanding its dynamical evolution in realistic conditions is essential. Unfortunately, numerous model studies show that degradation of entanglement from a quantum system's environment, especially thermal noise, is almost unavoidable. Thus the appellation `hot entanglement' appears like a contradiction, until Galve et al [Phys. Rev. Lett. \textbf{105} 180501 (2010)] announced that entanglement can be kept at high temperatures if one considers a quantum system with time-dependent coupling between the two parties, each interacting with its individual bath. With the goal of understanding the sustenance of entanglement at high temperatures, working with the same model and set up as Galve et al, namely, parametrically-driven coupled harmonic oscillators interacting with their own Markovian baths, this work probes into the feasibility of `hot entanglement' from three aspects listed in the subtitle. Our findings show that 1) hot entanglement functions only in the unstable regimes, 2) instability is a necessary but not sufficient condition, and 3) the power intake required by the drive operating in the unstable regime to sustain entanglement increases exponentially. The last factor indicates that hot entanglement under this modeling is theoretically untenable and its actual implementation likely unattainable.

Related papers

• Impossibility of bosonic autonomous entanglement engines in the weak-coupling limit [3.4137115855910767]
  Entangled states are fragile and maintaining coherence is a central challenge in quantum information processing. We show that a unique steady state is always separable.
  arXiv  Detail & Related papers  (2022-12-26T22:09:54Z)
• Entanglement and thermokinetic uncertainty relations in coherent mesoscopic transport [0.0]
  Coherence leads to entanglement and even nonlocality in quantum systems. Coherence may lead to a suppression of fluctuations, causing violations of thermo-kinetic uncertainty relations. Our results provide guiding principles for the design of out-of-equilibrium devices that exhibit nonclassical behavior.
  arXiv  Detail & Related papers  (2022-12-07T18:26:00Z)
• Quantum coherence-control of thermal energy transport: The V model as a case study [0.0]
  We study the role of quantum coherences in heat transport in the transient regime and in the nonequilibrium steady-state. We find that coherences are maximized when the heat current is suppressed. numerical simulations reveal that the transient behavior of coherences contrasts the steady-state limit.
  arXiv  Detail & Related papers  (2022-07-19T18:50:14Z)
• Floquet-heating-induced Bose condensation in a scar-like mode of an open driven optical-lattice system [62.997667081978825]
  We show that the interplay of bath-induced dissipation and controlled Floquet heating can give rise to non-equilibrium Bose condensation. Our predictions are based on a microscopic model that is solved using kinetic equations of motion derived from Floquet-Born-Markov theory.
  arXiv  Detail & Related papers  (2022-04-14T17:56:03Z)
• 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)
• 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)
• Evolution of a Non-Hermitian Quantum Single-Molecule Junction at Constant Temperature [62.997667081978825]
  We present a theory for describing non-Hermitian quantum systems embedded in constant-temperature environments. We find that the combined action of probability losses and thermal fluctuations assists quantum transport through the molecular junction.
  arXiv  Detail & Related papers  (2021-01-21T14:33:34Z)
• Quantum memory enhanced dissipative entanglement creation in non-equilibrium steady states [0.0]
  Article investigates dissipative preparation of entangled non-equilibrium steady states (NESS) We construct a collision model where the open system consists of two qubits which are coupled to heat reservoirs with different temperatures. We report that only a certain bath temperature range allows for entangled NESS.
  arXiv  Detail & Related papers  (2020-08-10T18:47:21Z)
• Quantum systems correlated with a finite bath: nonequilibrium dynamics and thermodynamics [0.0]
  We derive a master equation that accounts for system-bath correlations and includes, at a coarse-grained level, a dynamically evolving bath. Our work paves the way for studying a variety of nanoscale quantum technologies including engines, refrigerators, or heat pumps.
  arXiv  Detail & Related papers  (2020-08-05T15:19:29Z)
• Probing eigenstate thermalization in quantum simulators via fluctuation-dissipation relations [77.34726150561087]
  The eigenstate thermalization hypothesis (ETH) offers a universal mechanism for the approach to equilibrium of closed quantum many-body systems. Here, we propose a theory-independent route to probe the full ETH in quantum simulators by observing the emergence of fluctuation-dissipation relations. Our work presents a theory-independent way to characterize thermalization in quantum simulators and paves the way to quantum simulate condensed matter pump-probe experiments.
  arXiv  Detail & Related papers  (2020-07-20T18:00:02Z)
• Out-of-equilibrium quantum thermodynamics in the Bloch sphere: temperature and internal entropy production [68.8204255655161]
  An explicit expression for the temperature of an open two-level quantum system is obtained. This temperature coincides with the environment temperature if the system reaches thermal equilibrium with a heat reservoir. We show that within this theoretical framework the total entropy production can be partitioned into two contributions.
  arXiv  Detail & Related papers  (2020-04-09T23:06:43Z)

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.