Extended quantum Maxwell demon acting over macroscopic distances
arXiv:1811.05349 · doi:10.1103/PhysRevB.98.214502
Abstract
A quantum Maxwell demon is a device that can lower the entropy of a quantum system by providing it with purity. The functionality of such a quantum demon is rooted in a quantum mechanical SWAP operation exchanging mixed and pure states. We describe the setup and performance of a quantum Maxwell demon that purifies an energy-isolated system from a distance. Our cQED-based design involves two transmon qubits, where the mixed-state target qubit is purified by a pure-state demon qubit connected via an off-resonant transmission line; this configuration naturally generates an iSWAP gate. Although less powerful than a full SWAP gate, we show that assuming present-day performance characteristics of a cQED implementation, such an extended quantum Maxwell demon can purify the target qubit over macroscopic distances on the order of meters and tolerates elevated temperatures of the order of a few Kelvin in the transmission line.
arXiv comment10 pages, 4 figures
References in corpus (31)
- Charge insensitive qubit design derived from the Cooper pair box
- Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km
- Coupling Superconducting Qubits via a Cavity Bus
- Information heat engine: converting information to energy by feedback control
- Time Optimal Control in Spin Systems
- The Physics of Maxwell's demon and information
- Experimental realization of a Szilard engine with a single electron
- Quantum Equivalence and Quantum Signatures in Heat Engines
- Deterministic Quantum State Transfer and Generation of Remote Entanglement using Microwave Photons
- Experimental study of mutual information in a Maxwell Demon
- Observation of measurement-induced entanglement and quantum trajectories of remote superconducting qubits
- Observing a quantum Maxwell demon at work
- Quantum Szilard Engine
- On-demand quantum state transfer and entanglement between remote microwave cavity memories
- Thermodynamics with continuous information flow
- Natural two-qubit gate for quantum computation using the XY interaction
- A quantum-mechanical Maxwell's demon
- Universal features in the energetics of symmetry breaking
- Photonic Maxwell's demon
- Deterministic remote entanglement of superconducting circuits through microwave two-photon transitions
- Quantum Heat Engines Using Superconducting Quantum Circuits
- Experimental rectification of entropy production by a Maxwell's Demon in a quantum system
- Autonomous Quantum Refrigerator in a Circuit-QED Architecture Based on a Josephson Junction
- Autonomous quantum thermal machine for generating steady-state entanglement
- Interaction cost of non-local gates
- Maxwell's Demon Based on a Single Qubit
- H-theorem in quantum physics
- Trading coherence and entropy by a quantum Maxwell demon
- Entropy Dynamics in the System of Interacting Qubits
- H-theorem and Maxwell Demon in Quantum Physics
- Deterministic Bidirectional Communication and Remote Entanglement Generation Between Superconducting Quantum Processors