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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Heat and Work Along Individual Trajectories of a Quantum Bit
AU - Naghiloo, M.
AU - Tan, D.
AU - Harrington, P.M.
AU - Alonso, J.J.
AU - Lutz, E.
AU - Romito, A.
AU - Murch, K.W.
N1 - © 2020 American Physical Society
PY - 2020/3/20
Y1 - 2020/3/20
N2 - We use a near quantum limited detector to experimentally track individual quantum state trajectories of a driven qubit formed by the hybridization of a waveguide cavity and a transmon circuit. For each measured quantum coherent trajectory, we separately identify energy changes of the qubit as heat and work, and verify the first law of thermodynamics for an open quantum system. We further establish the consistency of these results by comparison with the master equation approach and the two-projective-measurement scheme, both for open and closed dynamics, with the help of a quantum feedback loop that compensates for the exchanged heat and effectively isolates the qubit.
AB - We use a near quantum limited detector to experimentally track individual quantum state trajectories of a driven qubit formed by the hybridization of a waveguide cavity and a transmon circuit. For each measured quantum coherent trajectory, we separately identify energy changes of the qubit as heat and work, and verify the first law of thermodynamics for an open quantum system. We further establish the consistency of these results by comparison with the master equation approach and the two-projective-measurement scheme, both for open and closed dynamics, with the help of a quantum feedback loop that compensates for the exchanged heat and effectively isolates the qubit.
U2 - 10.1103/PhysRevLett.124.110604
DO - 10.1103/PhysRevLett.124.110604
M3 - Journal article
VL - 124
JO - Physical review letters
JF - Physical review letters
SN - 1079-7114
IS - 11
M1 - 110604
ER -