Decoherence Dynamics of Complex Photon States in a Superconducting Circuit
H. Wang, M. Hofheinz, M. Ansmann, R. C. Bialczak, Erik Lucero, M. Neeley, A. D. O’Connell, D. Sank, M. Weides, J. Wenner, A. N. Cleland, John M. Martinis
DOI 10.1103/PhysRevLett.103.200404 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Quantum states inevitably decay with time into a probabilistic mixture of classical states due to their interaction with the environment and measurement instrumentation. We present the first measurement of the decoherence dynamics of complex photon states in a condensed-matter system. By controllably preparing a number of distinct quantum-superposed photon states in a superconducting microwave resonator, we show that the subsequent decay dynamics can be quantitatively described by taking into account only two distinct decay channels: energy relaxation and pure dephasing. Our ability to prepare specific initial quantum states allows us to measure the evolution of specific elements in the quantum density matrix in a very detailed manner that can be compared with theory.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Decoherence in a superconducting quantum bit circuit
similarity 0.98G. Ithier et al.
Source status unknown — claims are unverified
Dephasing of a Superconducting Qubit Induced by Photon Noise
similarity 0.97P. Bertet et al.
Source status unknown — claims are unverified
Dispersive measurements of superconducting qubit coherence with a fast latching readout
similarity 0.96I. Siddiqi et al.
Source status unknown — claims are unverified
Spectroscopy of low-frequency noise and its temperature dependence in a superconducting qubit
similarity 0.96Fei Yan et al.
Source status unknown — claims are unverified
Spectroscopy on Two Coupled Superconducting Flux Qubits
similarity 0.96J. B. Majer et al.
Source status unknown — claims are unverified
Spectral Signatures of Nontrivial Topology in a Superconducting Circuit
similarity 0.96L. Peyruchat et al.
Source status unknown — claims are unverified