Observation of quantum strong Mpemba effect

Abstract

An ancient and counterintuitive phenomenon know as the Mpemba effect (water can cool faster when initially heated up) showcases the critical role of initial conditions in relaxation processes. How to realize and utilize this effect for speeding up relaxation is an important but challenging task in purely quantum system till now. Here, we report the first experiment, as far as we know,about the strong Mpemba effect in a single trapped ion system in which an exponentially expedited relaxation in time is observed by preparing an optimal initial state with no excitation of the slowest decaying mode. Also, we find that the condition of realizing such effect coincides with the Liouvillian exceptional point, featuring the coalescence of both the eigenvalues and the eigenmodes of the system. Our work provides an efficient strategy to exponentially accelerate relaxations of quantum system to their stationary state, and suggests a link unexplored yet between the Mpemba effect and the non-Hermitian physics. It could open up the door to engineer a wide range of dissipative quantum systems by utilizing the anomalous Mpemba effect, for applications in quantum simulation and quantum information processing.

Accepted by Nature Communications

References in corpus (36)

• Efficient Z-Gates for Quantum Computing
• Quantum exceptional points of non-Hermitian Hamiltonians and Liouvillians: The effects of quantum jumps
• Faster than Hermitian Quantum Mechanics
• Quantum state tomography across the exceptional point in a single dissipative qubit
• Spectral theory of Liouvillians for dissipative phase transitions
• A universal qudit quantum processor with trapped ions
• Qudit Quantum State Tomography
• Engineered Dissipation for Quantum Information Science
• Anomalous cooling and heating - the Mpemba effect and its inverse
• Towards a theory of metastability in open quantum dynamics
• Relaxation times of dissipative many-body quantum systems
• When the Hotter Cools More Quickly: Mpemba Effect in Granular Fluids
• Exponentially faster cooling in a colloidal system
• Entanglement asymmetry as a probe of symmetry breaking
• Quantum jumps in the non-Hermitian dynamics of a superconducting qubit
• Exponentially accelerated approach to stationarity in Markovian open quantum systems through the Mpemba effect
• Geometrical Bounds of the Irreversibility in Markovian Systems
• Dynamical Control of Quantum Heat Engines Using Exceptional Points
• Microscopic origin of the quantum Mpemba effect in integrable systems
• Decoherence Induced Exceptional Points in a Dissipative Superconducting Qubit
• Quantum Mpemba effect in a quantum dot with reservoirs
• Shortcut to Equilibration of an Open Quantum System
• Lindblad dissipative dynamics in presence of phase coexistence
• Pre-Cooling Strategy Allows Exponentially Faster Heating
• Thermodynamics of the quantum Mpemba effect
• Signatures of Liouvillian exceptional points in a quantum thermal machine
• Enhancement of quantum heat engine by encircling a Liouvillian exceptional point
• Multiple quantum Mpemba effect: exceptional points and oscillations
• Heating and Cooling are Fundamentally Asymmetric and Evolve Along Distinct Pathways
• Hyper-acceleration of quantum thermalization dynamics by bypassing long-lived coherences: An analytical treatment
• Accelerating relaxation through Liouvillian exceptional point
• Eigenvalue crossing as a phase transition in relaxation dynamics
• Shortcuts of freely relaxing systems using equilibrium physical observables
• Emergent $\mathcal{P}\mathcal{T}$ symmetry in a double-quantum-dot circuit QED set-up
• Optimized Steering: Quantum State Engineering and Exceptional Points
• Shortcuts to adiabaticity for open quantum systems and a mixed-state inverse engineering scheme

Cited by in corpus (46)

• The quantum Mpemba effects
• Non-Markovian Quantum Mpemba effect
• The quantum Mpemba effect in free-fermionic mixed states
• Speedups in nonequilibrium thermal relaxation: Mpemba and related effects
• Quenching from superfluid to free bosons in two dimensions: entanglement, symmetries, and quantum Mpemba effect
• Anomalous discharging of quantum batteries: the ergotropic Mpemba effect
• Quantum Mpemba Effects from Symmetry Perspectives
• Symmetry restoration and quantum Mpemba effect in many-body localization systems
• Quantum Mpemba effect of localization in the dissipative mosaic model
• Measurement-induced symmetry restoration and quantum Mpemba effect
• Pontus-Mpemba effects
• Intrinsic Quantum Mpemba Effect in Markovian Systems and Quantum Circuits
• Quantum Mpemba effect without global symmetries
• Mpemba effect and super-accelerated thermalization in the damped quantum harmonic oscillator
• Tuning the Quantum Mpemba Effect in Isolated System by Initial State Engineering
• A simpler probe of the quantum Mpemba effect in closed systems
• Enhanced Quantum Mpemba Effect with Squeezed Thermal Reservoirs
• Quantum Mpemba effect from initial system-reservoir entanglement
• Simulating open quantum systems with giant atoms
• Quantum Mpemba effect in long-range spin systems
• Expedited thermalization dynamics in incommensurate systems
• Laser Mpemba effect
• Speeding up Pontus-Mpemba effects via dynamical phase transitions
• Quantum Zeno Effect in Noisy Integrable Quantum Circuits for Impurity Models
• Quantum Mpemba effect in parity-time symmetric systems
• Skin Effect Induced Anomalous Dynamics from Charge-Fluctuating Initial States
• The Mpemba effect in quantum oscillating and two-level systems
• Role of electron-electron interaction in the Mpemba effect in quantum dots
• Solution of the Metropolis dynamics on a complete graph with application to the Markov chain Mpemba effect
• Imaginary-time Mpemba effect in quantum many-body systems
• Relaxation Control of Open Quantum Systems
• Quantum Mpemba Effect Induced by Non-Markovian Exceptional Points
• Quantum Pontus-Mpemba Effect Enabled by the Liouvillian Skin Effect
• Reduced fidelities for free fermions out of equilibrium: From dynamical quantum phase transitions to Mpemba effect
• Quantum Pontus-Mpemba Effects in Real and Imaginary-time Dynamics
• Emergent Liouvillian exceptional points from exact principles
• A General Strategy for Realizing Mpemba Effects in Open Quantum Systems
• Extracting the symmetries of nonequilibrium quantum many-body systems
• Quantum Mpemba Effect in a Four-Site Bose-Hubbard Model
• Robustness of the quantum Mpemba effect against state-preparation errors
• Separation of relaxation timescales via strong system-bath coupling: Dissipative three-level system as a case study
• Adaptive, symmetry-informed Bayesian metrology for precise quantum technology measurements
• Signatures of quantum chaos and complexity in the Ising model on random graphs
• Quantum Mpemba effect in chaotic systems with conservation laws
• Memory Control of Ice Growth During Non-Equilibrium Freezing of Water
• Exponentially accelerated relaxation and quantum Mpemba effect in open quantum systems