TY - JOUR
T1 - A comparative study of system size dependence of the effect of non-unitary channels on different classes of quantum states
AU - Narang, Geetu
AU - Dogra, Shruti
AU - Arvind,
PY - 2020/11/1
Y1 - 2020/11/1
N2 - We investigate the effect of different types of non-unitary quantum channels on multiqubit quantum systems. For an n-qubit system and a particular channel, in order to draw unbiased conclusions about the system as a whole as opposed to specific states, we evolve a large number of randomly generated states under the given channel. We increase the number of qubits and study the effect of system size on the decoherence processes. The entire scheme is repeated for various types of environments which include dephasing channel, depolarizing channel, collective dephasing channel and zero temperature bath. Non-unitary channels representing the environments are modeled via their Kraus operator decomposition or master equation approach. Further, for a given n we restrict ourselves to the study of particular subclasses of entangled states, namely the GHZ-type and W-type states. We generate random states within these classes and study the class behaviors under different quantum channels for various values of n.
AB - We investigate the effect of different types of non-unitary quantum channels on multiqubit quantum systems. For an n-qubit system and a particular channel, in order to draw unbiased conclusions about the system as a whole as opposed to specific states, we evolve a large number of randomly generated states under the given channel. We increase the number of qubits and study the effect of system size on the decoherence processes. The entire scheme is repeated for various types of environments which include dephasing channel, depolarizing channel, collective dephasing channel and zero temperature bath. Non-unitary channels representing the environments are modeled via their Kraus operator decomposition or master equation approach. Further, for a given n we restrict ourselves to the study of particular subclasses of entangled states, namely the GHZ-type and W-type states. We generate random states within these classes and study the class behaviors under different quantum channels for various values of n.
KW - Quantum channels
KW - Quantum decoherence
KW - Quantum dissipation
UR - http://www.scopus.com/inward/record.url?scp=85094940395&partnerID=8YFLogxK
U2 - 10.1007/s11128-020-02904-1
DO - 10.1007/s11128-020-02904-1
M3 - Article
AN - SCOPUS:85094940395
VL - 19
JO - Quantum Information Processing
JF - Quantum Information Processing
SN - 1570-0755
IS - 11
M1 - 397
ER -