Decoherence-free quantum information in Markovian systems

TY - JOUR

T1 - Decoherence-free quantum information in Markovian systems

AU - Patra, Manas K.

AU - Brooke, Peter G.

PY - 2008/7/29

Y1 - 2008/7/29

N2 - Decoherence in Markovian systems can result indirectly from the action of a system Hamiltonian which is usually fixed and unavoidable. Here, we show that in general in Markovian systems, because of the system Hamiltonian, quantum information decoheres. We give conditions for the system Hamiltonian that must be satisfied if coherence is to be preserved. Finally, we show how to construct robust subspaces for quantum-information processing.

AB - Decoherence in Markovian systems can result indirectly from the action of a system Hamiltonian which is usually fixed and unavoidable. Here, we show that in general in Markovian systems, because of the system Hamiltonian, quantum information decoheres. We give conditions for the system Hamiltonian that must be satisfied if coherence is to be preserved. Finally, we show how to construct robust subspaces for quantum-information processing.

KW - FREE SUBSPACES

KW - COMPUTATION

KW - MEMORY

KW - BITS

UR - http://www.scopus.com/inward/record.url?scp=48349084808&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.78.010308

DO - 10.1103/PhysRevA.78.010308

M3 - Article

SN - 1050-2947

VL - 78

SP - -

JO - Physical Review A

JF - Physical Review A

IS - 1

M1 - 010308

ER -