Anders and Briegel in Python
Du kannst nicht mehr als 25 Themen auswählen Themen müssen entweder mit einem Buchstaben oder einer Ziffer beginnen. Sie können Bindestriche („-“) enthalten und bis zu 35 Zeichen lang sein.

#### 87 Zeilen 2.5KB Originalformat Blame Verlauf

 ``````# -*- coding: utf-8 -*- """ This module handles operations on the Clifford group. It makes extensive use of the lookup tables in ``abp.tables``. The code to generate those tables is included in this distribution as ``abp/build_tables.py`` This package emumerates and labels the single-qubit Clifford group, and provides methods for matrix multiplication and conjugation. It also includes the look-up table for the CZ gate. There are 24 members of the single-qubit Clifford group. You can refer to some of them by multiple names. The complete set of aliases for single-qubit Cliffords is as follows: ======= ========================= Index Aliases ======= ========================= 0 ``IA, identity, identity_h`` 1 ``XA, px, px_h`` 2 ``YA, py, py_h`` 3 ``ZA, pz, pz_h`` 4 ``IB`` 5 ``XB, sqz, msqz_h, phase_h`` 6 ``YB, msqz, sqz_h, phase`` 7 ``ZB`` 8 ``IC`` 9 ``XC, msqy, sqy_h`` 10 ``YC, hadamard, hadamard_h`` 11 ``ZC, sqy, msqy_h`` 12 ``ID`` 13 ``XD`` 14 ``YD, sqx, msqx_h`` 15 ``ZD, msqx, sqx_h`` 16 ``IE`` 17 ``XE`` 18 ``YE`` 19 ``ZE`` 20 ``IF`` 21 ``XF`` 22 ``YF`` 23 ``ZF`` ======= ========================= """ from tables import * # Aliases identity = by_name["identity"] hadamard = by_name["hadamard"] px = by_name["px"] py = by_name["py"] pz = by_name["pz"] msqx_h = by_name["msqx_h"] sqz_h = by_name["sqz_h"] def conjugate(operator, unitary): """ Returns transform * vop * transform^dagger and a phase in {+1, -1} """ return measurement_table[operator, unitary] def use_old_cz(): """ Use the CZ lookup table from A&B's code, rather than our own. Useful for testing. """ global cz_table from .anders_cz import cz_table def get_name(i): """ Get the name of this clifford """ return "IXYZ"[i & 0x03] + "ABCDEF"[i / 4] def human_name(i): """ Get the human-readable name of this clifford - slow """ choices = sorted((key for key, value in list(by_name.items()) if value == i), key=len) return choices[-1] def is_diagonal(v): """ Checks if a VOP is diagonal or not """ return v in {0, 3, 5, 6} if __name__ == '__main__': from itertools import groupby for i in range(24): members = [key for key, value in list(by_name.items()) if value == i and str(key)!=str(i)] members = sorted(members, key=len) print("* {}: {}".format(i, ", ".join(members))) ``````