Discussion Overview
The discussion revolves around the decoherence time scales associated with different physical realizations of qubits, including photons, spin electrons, nuclei, and ion traps. Participants seek to understand the variability in decoherence times and the factors influencing these times across various implementations.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- One participant, Gioia, inquires about the specific decoherence times for various qubit realizations, expressing difficulty in finding this information.
- Another participant suggests that decoherence times can range from 1 femtosecond to 1 second, indicating that the times depend on both the physical system and its implementation.
- Gioia acknowledges the variability but requests specific numerical estimates for decoherence times for different particles.
- A different participant advises looking up recent papers rather than textbooks, noting that superconducting qubits have seen significant improvements in coherence times, from about 10 nanoseconds to at least 10 microseconds over a decade.
- Gioia expresses intent to search for more information specifically about optical quantum computation and ion traps.
Areas of Agreement / Disagreement
Participants generally agree on the variability of decoherence times across different qubit realizations, but there is no consensus on specific values or sources for these times. The discussion remains unresolved regarding exact figures for each type of qubit.
Contextual Notes
The discussion highlights the limitations in available data and the rapid evolution of the field, suggesting that past information may no longer be relevant.