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Published April 23, 2021 | Version v0.15.0
Software Open

XanaduAI/thewalrus: Version 0.15.0

Creators

  • 1. @XanaduAI
  • 2. Xanadu Quantum Technologies
  • 3. University of York
  • 4. Slovak Academy of Sciences
  • 5. Dept. of Maths, UniTS | @aicps-units | @sissa

Description

New features

  • Adds the function random_banded_interferometer to generate unitary matrices with a given bandwidth. #208

  • Adds the function tvd_cutoff_bounds to calculate bounds in the total variation distance between a Fock-truncated and an ideal GBS distribution. #210

  • Adds function for calculating threshold detection probabilities for Gaussian states with displacement. #220

  • Adds new functions total_photon_number_distribution and characteristic_function to study properties of the total photon number distribution of a k identical lossy squeezers. #230

  • Adds new functions xxpp_to_xpxp and xpxp_to_xxpp in the symplectic module to swap the ordering of the quadrature operators in vectors and matrices. #237

Improvements

  • The hafnians and loop hafnians of diagonal matrices are now calculated in polynomial time. #212

  • Refactors setup.py to avoid issues with CFLAGS. #229

  • The fidelity function in quantum/gaussian_checks.py is rewritten to add clarity. #226

  • Simplifies logic of normal_ordered_expectation by removing mutually cancelling np.conj. #228

Bug fixes

  • Removes unnecessary np.real_if_close statements in quantum/fock_tensors.py causing the probabilities to not be normalized. #215

  • Fixes the prefactor in pure_state_amplitude. #231

Contributors

This release contains contributions from (in alphabetical order):

Jack Brown, Jake Bulmer, Rachel Chadwick, Stefano Paesani, Nicolas Quesada

Files

XanaduAI/thewalrus-v0.15.0.zip

Files (2.0 MB)

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md5:24fa0a7db66f9fe0b566471a6d5118fb
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Additional details

Related works

Is supplement to
https://github.com/XanaduAI/thewalrus/tree/v0.15.0 (URL)