Robust mode conversion in NV centers using exceptional points

Abstract

We show that microwave-driven NV centers can function as topological mode switches by utilizing a special degeneracy called an exceptional point (EP). By tuning the intensities and frequencies of the driving fields, we find an EP---where two normal modes of the system coalesce---and, then, use it to simulate the dynamics and demonstrate topological and non-reciprocal mode switching. By comparing density matrices of the input and output states, we find that the quantum correlations decrease by three orders of magnitude at room temperature, and discuss ways for improving this result. This work extends the theory of topological mode switches (originally derived for pure states) to mixed states and is, therefore, applicable to general open quantum systems. Our theory enables exploring new phenomena (e.g., high-order EPs in low-dimensional systems) and presents a crucial step towards incorporating topological mode switches in quantum-information applications.

arXiv comment9 pages, 5 figures

References in corpus (26)

• Non-Abelian Anyons and Topological Quantum Computation
• Berry Phase Effects on Electronic Properties
• Topological Photonics
• The nitrogen-vacancy colour centre in diamond
• High-sensitivity diamond magnetometer with nanoscale resolution
• PT-Symmetric Quantum Mechanics
• Dynamically encircling exceptional points in a waveguide: asymmetric mode switching from the breakdown of adiabaticity
• Topological energy transfer in an optomechanical system with exceptional points
• The Bloch Vector for N-Level Systems
• Observation of parity-time symmetry breaking in a single spin system
• Dynamically encircling exceptional points: Exact evolution and polarization state conversion
• Characterization of the Positivity of the Density Matrix in Terms of the Coherence Vector Representation
• General description of quasi-adiabatic dynamical phenomena near exceptional points
• Adiabatic approximation in open quantum systems
• Dynamically encircling exceptional points: in situ control of encircling loops and the role of the starting point
• Polarization-selective excitation of N-V centers in diamond
• Geometry of the generalized Bloch sphere for qutrits
• Chiral state-conversion without encircling an exceptional point
• Exceptional Points and Asymmetric Mode Switching in Plasmonic Waveguides
• Strong driving of a single spin using arbitrarily polarized fields
• Exceptional points for parameter estimation in open quantum systems: Analysis of the Bloch equations
• Optimal Control for Open Quantum Systems: Qubits and Quantum Gates
• Symmetry recovery of exceptional points and their dynamical encircling in a two-state system
• Parameter estimation in atomic spectroscopy using exceptional points
• Computation of multiple eigenvalues and generalized eigenvectors for matrices dependent on parameters
• A view on the open STIRAP problem

Cited by in corpus (18)

• Non-Hermitian Physics
• Quantum jumps in the non-Hermitian dynamics of a superconducting qubit
• Dynamically encircling an exceptional point in a real quantum system
• Decoherence Induced Exceptional Points in a Dissipative Superconducting Qubit
• High-order exceptional points in supersymmetric arrays
• Emergence of PT-symmetry breaking in open quantum systems
• Quantum simulation of parity-time symmetry breaking with a superconducting quantum processor
• Resolving the topology of encircling multiple exceptional points
• Pontryagin-Optimal Control of a non-Hermitian Qubit
• Near-unit efficiency of chiral state conversion via hybrid-Liouvillian dynamics
• Excepional Points from Hamiltonians of hybrid physical systems: Squeezing and anti-Squeezing
• Liouvillian exceptional points of an open driven two-level system
• Experimental demonstration of the dynamics of quantum coherence evolving under a PT-symmetric Hamiltonian on an NMR quantum processor
• Exploring the topology of a non-Hermitian superconducting qubit using shortcuts to adiabaticity
• Multitype entanglement dynamics induced by exceptional points
• Noise-Canceling Quantum Feedback: non-Hermitian Dynamics with Applications to State Preparation and Magic State Distillation
• Stochastic unravelings for Heisenberg picture and trace-nonpreserving dynamics
• Swanson Hamiltonian: non-PT-symmetry phase