Entangled quantum Unruh Otto engine is more efficient

Abstract

We propose a relativistic quantum Otto cycle between an entangled state of two qubits and their composite excited (or ground) state whose efficiency can be greater than the usual single qubit quantum Otto engine. The hot and cold reservoirs are constructed by providing uniform accelerations to these qubits along with the interaction between the background field and individual qubits. The efficiency, as measured from one of the qubits' frame, not only depends on the energy gap of the states but also the relative acceleration between them. For lower acceleration of our observer's qubit compared to the other one, the cycle is more efficient than the single qubit quantum Otto engine. Furthermore, a complete protocol to construct such a cycle is being provided.

arXiv comment6+11 pages, modified version, to appear as a Letter in Phys. Rev. D

References in corpus (24)

• Alice falls into a black hole: Entanglement in non-inertial frames
• The second law, Maxwell's daemon and work derivable from quantum heat engines
• Entanglement from the vacuum
• Effective Field Theory Approach to Gravitationally Induced Decoherence
• A Master Equation for Gravitational Decoherence: Probing the Textures of Spacetime
• Relativistic Quantum Teleportation with Superconducting Circuits
• Teleportation in a non-inertial frame
• Voyage to Alpha Centauri: Entanglement degradation of cavity modes due to motion
• Harvesting Entanglement with Detectors Freely Falling into a Black Hole
• Entangling moving cavities in non-inertial frames
• Harvesting correlations in Schwarzschild and collapsing shell spacetimes
• Entanglement harvesting and divergences in quadratic Unruh-DeWitt detectors pairs
• Boundary effects on radiative processes of two entangled atoms
• New techniques for entanglement harvesting in flat and curved spacetimes
• Quantum teleportation in vacuum using only Unruh-DeWitt detectors
• Radiative process of two entangled uniformly accelerated atoms in a thermal bath: a possible case of anti-Unruh event
• Role of thermal field in entanglement harvesting between two accelerated Unruh-DeWitt detectors
• Entanglement extracted from vacuum into accelerated Unruh-DeWitt detectors and energy conservation
• The Unruh Quantum Otto Engine
• Scalar and fermionic Unruh Otto engines
• Decoherence as Detector of the Unruh Effect
• Unruh Quantum Otto heat engine with level degeneracy
• Field assisted extraction and swelling of quantum coherence for moving Unruh-DeWitt detectors
• Radiative Processes of Entangled Detectors in Rotating Frames

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• Constructing an entangled Unruh Otto engine and its efficiency
• The quantum Otto cycle in a superconducting cavity in the non-adiabatic regime
• Unruh quantum Otto engine in the presence of a reflecting boundary
• Quantum Otto engine driven by quantum fields
• An exactly solvable relativistic quantum Otto engine
• Relativistic quantum Otto engine: Instant work extraction from a quantum field
• Maximum Power of Coupled-Qubit Otto Engines
• A photonic engine fueled by quantum-correlated atoms
• Unruh-Fulling effect in nonlocal field theory: The role of Unruh decomposition
• Quantum thermal machines in BTZ black hole spacetime
• Relativistic quantum Otto heat engine using a three-level Unruh-DeWitt detector
• Accelerated paths and Unruh effect II: finite time detector response in (Anti) de Sitter spacetime and Huygen's Principle
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