TY  - JOUR
AU  - Koczor, Bálint
AU  - Zeier, Robert
AU  - Glaser, Steffen J.
TI  - Fast computation of spherical phase-space functions of quantum many-body states
JO  - Physical review / A
VL  - 102
IS  - 6
SN  - 2469-9926
M1  - FZJ-2020-05407
SP  - 062421
PY  - 2020
AB  - Quantum devices are preparing increasingly more complex entangled quantum states. How can one effectively study these states in light of their increasing dimensions? Phase spaces such as Wigner functions provide a suitable framework. We focus on spherical phase spaces for finite-dimensional quantum states of single qudits or permutationally symmetric states of multiple qubits. We present methods to efficiently compute the correspond- ing spherical phase-space functions which are at least an order of magnitude faster than traditional methods. Quantum many-body states in much larger dimensions can now be effectively studied by experimentalists and theorists using spherical phase-space techniques.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000600817700004
DO  - DOI:10.1103/PhysRevA.102.062421
UR  - https://juser.fz-juelich.de/record/889034
ER  -