TY - JOUR
T1 - Non-Markovian control of qubit thermodynamics by frequent quantum measurements
AU - Bensky, Guy
AU - Bhaktavatsala Rao, D. D.
AU - Gordon, Goren
AU - Erez, Noam
AU - Kurizki, Gershon
N1 - Funding Information:
We acknowledge the support of ISF, GIF and EC.
PY - 2010/1
Y1 - 2010/1
N2 - We explore the effects of frequent, impulsive quantum non-demolition measurements of the energy of two-level systems (TLS), alias qubits, in contact with a thermal bath. The resulting entropy and temperature of both the system and the bath are found to be completely determined by the measurement rate, and unrelated to what is expected by standard thermodynamical rules that hold for Markovian baths. These anomalies allow for very fast control of heating, cooling and state-purification (entropy reduction) of qubits, much sooner than their thermal equilibration time.
AB - We explore the effects of frequent, impulsive quantum non-demolition measurements of the energy of two-level systems (TLS), alias qubits, in contact with a thermal bath. The resulting entropy and temperature of both the system and the bath are found to be completely determined by the measurement rate, and unrelated to what is expected by standard thermodynamical rules that hold for Markovian baths. These anomalies allow for very fast control of heating, cooling and state-purification (entropy reduction) of qubits, much sooner than their thermal equilibration time.
KW - Non-Markovian effects
KW - Quantum measurements
KW - Quantum thermodynamics
UR - https://www.scopus.com/pages/publications/74149092840
U2 - 10.1016/j.physe.2009.06.029
DO - 10.1016/j.physe.2009.06.029
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AN - SCOPUS:74149092840
SN - 1386-9477
VL - 42
SP - 477
EP - 483
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
IS - 3
ER -