6533b82efe1ef96bd12934b4
RESEARCH PRODUCT
Observation of time-invariant coherence in a nuclear magnetic resonance quantum simulator
Raimund MarxAlexandre M. SouzaDiogo O. Soares-pintoRoberto S. SarthourRosario Lo FrancoI. A. SilvaI. A. SilvaIvan S. OliveiraMarco CianciarusoMarco CianciarusoSteffen J. GlaserEduardo R. DeazevedoThomas R. BromleyGerardo Adessosubject
PhysicsQuantum discordNuclear Magnetic ResonancePOLÍMEROS (MATERIAIS)General Physics and AstronomyQuantum simulatorQuantum correlation01 natural sciencesSettore FIS/03 - Fisica Della MateriaNon-dissipative evolution010305 fluids & plasmasQuantum coherenceOpen quantum systemNuclear magnetic resonanceCoherence theoryQuantum error correctionQuantum stateOpen quantum systemQuantum mechanicsQuantum processFreezing0103 physical sciences010306 general physicsQuantum dissipationdescription
The ability to live in coherent superpositions is a signature trait of quantum systems and constitutes an irreplaceable resource for quantum-enhanced technologies. However, decoherence effects usually destroy quantum superpositions. It was recently predicted that, in a composite quantum system exposed to dephasing noise, quantum coherence in a transversal reference basis can stay protected for an indefinite time. This can occur for a class of quantum states independently of the measure used to quantify coherence, and it requires no control on the system during the dynamics. Here, such an invariant coherence phenomenon is observed experimentally in two different setups based on nuclear magnetic resonance at room temperature, realizing an effective quantum simulator of two- and four-qubit spin systems. Our study further reveals a novel interplay between coherence and various forms of correlations, and it highlights the natural resilience of quantum effects in complex systems.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-10-14 |