Version 2.26.0

[kalzoo]

Announcements

• Quil-T brings the dimension of time to your quantum programs! Quil-T is an extension of
  Quil which allows one to develop quantum programs at the level of pulses and waveforms
  and brings an unprecedented level of fine-grained control over the QPU.

Improvements and Changes

• Unpacking bitstrings is significantly faster (@mhodson-rigetti, @notmgsk, Efficient unpacking of bitstring #1276).
• Parsing is now performed using Lark rather than ANTLR, often allowing a 10x improvement
  in parsing large and complex programs (@notmgsk, Port to Lark parser #1278).
• Gates now generally allow a "formal" qubit label as in DEFCIRCUIT, rather than
  requiring a numeric index (Quilt Extensions #1257).
• Program objects come with additional Quil-T related properties, such as
  calibrations, waveforms, and frames (Quilt Extensions #1257).
• The AbstractCompiler classes come with tools for performing calibration of
  programs. Namely, get_calibration_program provides a program for calibrating against
  recent QPU settings (Quilt Extensions #1257).
• rewrite_arithmetic now converts phase angle from radians to revolutions (Quilt Extensions #1257).
• Readout is more permissive, and does not require the destination to be named "ro"
  (Quilt Extensions #1257).
• The default value for QPU_COMPILER_URL has been updated to point to Rigetti's
  translation service. This changes allows one to use the translation service to translate
  a Quil-T program and receive the binary payload without having a QPU reservation
  (Quilt Extensions #1257).

[notmgsk]

A necessary addition:

• Quilt -> Quil-T #1285
  A potential addition:
• Native pragma support #1282