Enhancing the robustness of dynamical decoupling sequences with correlated random phases

• URL: http://arxiv.org/abs/2003.13453v1
• Date: Mon, 30 Mar 2020 13:14:27 GMT
• Title: Enhancing the robustness of dynamical decoupling sequences with correlated random phases
• Authors: Zhen-Yu Wang, Jorge Casanova, and Martin B. Plenio
• Abstract summary: We show that the addition of correlated phases to the recently developed method of randomized dynamical decoupling pulse sequences can improve its performance in quantum sensing. In particular, by correlating the relative phases of basic pulse units in dynamical decoupling sequences, we are able to improve the suppression of the signal distortion due to $pi$ pulse imperfections and spurious responses due to finite-width $pi$ pulses.
• Score: 5.592842997214522
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We show that the addition of correlated phases to the recently developed method of randomized dynamical decoupling pulse sequences [Physical Review Letters 122, 200403 (2019)] can improve its performance in quantum sensing. In particular, by correlating the relative phases of basic pulse units in dynamical decoupling sequences, we are able to improve the suppression of the signal distortion due to $\pi$ pulse imperfections and spurious responses due to finite-width $\pi$ pulses. This enhances selectivity of quantum sensors such as those based on NV centers in diamond.

Related papers

• Stochastic action for the entanglement of a noisy monitored two-qubit system [55.2480439325792]
  We study the effect of local unitary noise on the entanglement evolution of a two-qubit system subject to local monitoring and inter-qubit coupling. We construct a Hamiltonian by incorporating the noise into the Chantasri-Dressel-Jordan path integral and use it to identify the optimal entanglement dynamics. Numerical investigation of long-time steady-state entanglement reveals a non-monotonic relationship between concurrence and noise strength.
  arXiv  Detail & Related papers  (2024-03-13T11:14:10Z)
• Slow semiclassical dynamics of a two-dimensional Hubbard model in disorder-free potentials [77.34726150561087]
  We show that introduction of harmonic and spin-dependent linear potentials sufficiently validates fTWA for longer times. In particular, we focus on a finite two-dimensional system and show that at intermediate linear potential strength, the addition of a harmonic potential and spin dependence of the tilt, results in subdiffusive dynamics.
  arXiv  Detail & Related papers  (2022-10-03T16:51:25Z)
• Frequency combs with parity-protected cross-correlations from dynamically modulated qubit arrays [117.44028458220427]
  We develop a general theoretical framework to dynamically engineer quantum correlations in the frequency-comb emission from an array of superconducting qubits in a waveguide. We demonstrate, that when the resonance of the two qubits are periodically modulated with a $pi$ phase shift, it is possible to realize simultaneous bunching and antibunching in cross-correlations of the scattered photons from different sidebands.
  arXiv  Detail & Related papers  (2022-03-01T13:12:45Z)
• Decimation technique for open quantum systems: a case study with driven-dissipative bosonic chains [62.997667081978825]
  Unavoidable coupling of quantum systems to external degrees of freedom leads to dissipative (non-unitary) dynamics. We introduce a method to deal with these systems based on the calculation of (dissipative) lattice Green's function. We illustrate the power of this method with several examples of driven-dissipative bosonic chains of increasing complexity.
  arXiv  Detail & Related papers  (2022-02-15T19:00:09Z)
• Dynamical phases and quantum correlations in an emitter-waveguide system with feedback [0.0]
  We investigate the creation and control of emergent collective behavior and quantum correlations using feedback in an emitter-waveguide system. We show the emergence of a time-crystal phase, the transition to which is controlled by the feedback strength. Our study corroborates the potential of integrated emitter-waveguide systems for the exploration of collective quantum phenomena.
  arXiv  Detail & Related papers  (2021-02-04T16:27:20Z)
• Coherent Dynamics in Quantum Emitters under Dichromatic Excitation [0.0]
  We characterize the coherent dynamics of a two-level quantum emitter driven by a pair of symmetrically-detuned phase-locked pulses. The promise of dichromatic excitation is to spectrally isolate the excitation laser from the quantum emission, enabling background-free photon extraction from the emitter.
  arXiv  Detail & Related papers  (2020-09-04T11:52:39Z)
• Phase-adaptive dynamical decoupling methods for robust spin-spin dynamics in trapped ions [3.8580539160777625]
  Quantum platforms based on trapped ions are main candidates to build a quantum hardware with computational capacities that surpass those of classical devices. Among the available control techniques in these setups, pulsed dynamical decoupling (pulsed DD) revealed as a useful method to process the information encoded in ion registers. We incorporate a pulsed DD technique that uses random pulse phases, or correlated pulse phases, to significantly enhance the robustness of entangling spin-spin dynamics in trapped ions.
  arXiv  Detail & Related papers  (2020-08-25T10:42:36Z)
• Feedback-induced instabilities and dynamics in the Jaynes-Cummings model [62.997667081978825]
  We investigate the coherence and steady-state properties of the Jaynes-Cummings model subjected to time-delayed coherent feedback. The introduced feedback qualitatively modifies the dynamical response and steady-state quantum properties of the system.
  arXiv  Detail & Related papers  (2020-06-20T10:07:01Z)
• Process tomography of Robust Dynamical Decoupling in Superconducting Qubits [91.3755431537592]
  The Rigetti quantum computing platform was used to test different dynamical decoupling sequences. The performance of the sequences was characterized by Quantum Process Tomography and analyzed using the quantum channels formalism.
  arXiv  Detail & Related papers  (2020-06-18T14:48:18Z)
• Remote Individual Addressing of Quantum Emitters with Chirped Pulses [0.0]
  We introduce a family of chirped pulses that dynamically self-compress to sub-wavelength spot sizes during their evolution. We show that the interaction of such pulses with a quantum emitter is highly sensitive to its position due to effective Landau-Zener processes induced by the pulse chirping.
  arXiv  Detail & Related papers  (2020-05-15T12:51:04Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.