Measuring Time-Dependent Induced Quantum Coherences via Two-Dimensional Coherence Spectroscopy

• URL: http://arxiv.org/abs/2104.03041v2
• Date: Tue, 23 Nov 2021 13:45:27 GMT
• Title: Measuring Time-Dependent Induced Quantum Coherences via Two-Dimensional Coherence Spectroscopy
• Authors: William Barford, Allison Nicole Arber, Fynn McLennan, Max Marcus
• Abstract summary: We propose a two-dimensional spectroscopic protocol for measuring the time-dependent coherences between the stationary states of a system. We also investigate the role of temporally-correlated noise on coherence dephasing.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We propose a two-dimensional spectroscopic protocol for measuring the time-dependent coherences between the stationary states of a system induced by a time-dependent system-bath interaction. We also investigate the role of temporally-correlated noise on coherence dephasing. This protocol enables dynamical information about the system and its coupling to the environment to be determined. Our results are based on the quantum-trajectory method, and are obtained from both approximate, analytical and exact, numerical solutions of the time-dependent Schroedinger equation. As an example, we show how this protocol can be used to investigate exciton dynameds in conjugated polymers induced by the coupling of their torsional modes with the environment.

Related papers

• Certifying Quantum Temporal Correlation via Randomized Measurements: Theory and Experiment [4.83663467727187]
  We consider the certification of temporal quantum correlations using the pseudo-density matrix (PDM) PDM is an extension of the density matrix to the time domain, where negative eigenvalues are key indicators of temporal correlations. We develop an efficient protocol for temporal correlation detection by virtually preparing the PDM within a single time slice.
  arXiv  Detail & Related papers  (2024-09-04T06:40:42Z)
• A quantum analog of Huygen's clock: noise-induced synchronization [4.723476740627709]
  In our proposed model, the relative phase of the two spins become synchronized through interaction with a mutual, correlated, environment. We show that for a system of qubits, several arguments can be made that significantly reduce the cardinality of the set of allowed measurements. We present a numerically efficient method to calculate the degree of quantumness that exists in the correlations of our final density matrix.
  arXiv  Detail & Related papers  (2024-07-24T16:12:27Z)
• 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)
• Qubit-environment entanglement in time-dependent pure dephasing [0.0]
  We show that the methods for quantifying system-environment entanglement can be straightforwardly generalized to time-dependent Hamiltonians. We use these methods to study the nature of the decoherence of a qubit-oscillator system.
  arXiv  Detail & Related papers  (2023-12-05T11:23:25Z)
• Evolution of many-body systems under ancilla quantum measurements [58.720142291102135]
  We study the concept of implementing quantum measurements by coupling a many-body lattice system to an ancillary degree of freedom. We find evidence of a disentangling-entangling measurement-induced transition as was previously observed in more abstract models.
  arXiv  Detail & Related papers  (2023-03-13T13:06:40Z)
• Snapshotting Quantum Dynamics at Multiple Time Points [10.226937603741474]
  We propose a method to extract dynamic information from a quantum system at intermediate time points. We reconstruct a multi-time quasi-probability distribution (QPD) that correctly recovers the probability at the respective time points.
  arXiv  Detail & Related papers  (2022-07-13T10:28:01Z)
• Stochastic entropy production for continuous measurements of an open quantum system [0.0]
  We investigate the total entropy production of a two-level bosonic open quantum system under protocols of time dependent coupling to a harmonic environment. The entropy production depends on the evolution of the system variables and their probability density function, and is expressed through system and environmental contributions.
  arXiv  Detail & Related papers  (2022-05-15T13:55:51Z)
• Neural-Network Quantum States for Periodic Systems in Continuous Space [66.03977113919439]
  We introduce a family of neural quantum states for the simulation of strongly interacting systems in the presence of periodicity. For one-dimensional systems we find very precise estimations of the ground-state energies and the radial distribution functions of the particles. In two dimensions we obtain good estimations of the ground-state energies, comparable to results obtained from more conventional methods.
  arXiv  Detail & Related papers  (2021-12-22T15:27:30Z)
• Finite resolution ancilla-assisted measurements of quantum work distributions [77.34726150561087]
  We consider an ancilla-assisted protocol measuring the work done on a quantum system driven by a time-dependent Hamiltonian. We consider system Hamiltonians which both commute and do not commute at different times, finding corrections to fluctuation relations like the Jarzynski equality and the Crooks relation.
  arXiv  Detail & Related papers  (2021-11-30T15:08:25Z)
• Generalized quantum measurements with matrix product states: Entanglement phase transition and clusterization [58.720142291102135]
  We propose a method for studying the time evolution of many-body quantum lattice systems under continuous and site-resolved measurement. We observe a peculiar phenomenon of measurement-induced particle clusterization that takes place only for frequent moderately strong measurements, but not for strong infrequent measurements.
  arXiv  Detail & Related papers  (2021-04-21T10:36:57Z)
• Controlled coherent dynamics of [VO(TPP)], a prototype molecular nuclear qudit with an electronic ancilla [50.002949299918136]
  We show that [VO(TPP)] (vanadyl tetraphenylporphyrinate) is a promising system suitable to implement quantum computation algorithms. It embeds an electronic spin 1/2 coupled through hyperfine interaction to a nuclear spin 7/2, both characterized by remarkable coherence.
  arXiv  Detail & Related papers  (2021-03-15T21:38:41Z)

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.