Negative Full Counting Statistics Arise from Interference Effects
Hofer, Patrick P. LU
and Clerk, A. A.
(2016)
In Physical Review Letters
116(1).
- Abstract
The Keldysh-ordered full counting statistics is a quasiprobability distribution describing the fluctuations of a time-integrated quantum observable. While it is well known that this distribution can fail to be positive, the interpretation and origin of this negativity has been somewhat unclear. Here, we show how the full counting statistics can be tied to trajectories through Hilbert space, and how this directly connects negative quasiprobabilities to an unusual interference effect. Our findings are illustrated with the example of energy fluctuations in a driven bosonic resonator; we discuss how negative quasiprobability here could be detected experimentally using superconducting microwave circuits.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/f1866b5d-9082-4e99-9f68-8b13eeb63a00
- author
- Hofer, Patrick P.
LU
and Clerk, A. A.
- publishing date
- 2016-01-07
- type
- Contribution to journal
- publication status
- published
- in
- Physical Review Letters
- volume
- 116
- issue
- 1
- article number
- 013603
- publisher
- American Physical Society
- external identifiers
-
- scopus:84954426406
- ISSN
- 0031-9007
- DOI
- 10.1103/PhysRevLett.116.013603
- language
- English
- LU publication?
- no
- id
- f1866b5d-9082-4e99-9f68-8b13eeb63a00
- date added to LUP
- 2019-05-14 09:50:15
- date last changed
- 2022-04-10 08:20:00
@article{f1866b5d-9082-4e99-9f68-8b13eeb63a00,
abstract = {{<p>The Keldysh-ordered full counting statistics is a quasiprobability distribution describing the fluctuations of a time-integrated quantum observable. While it is well known that this distribution can fail to be positive, the interpretation and origin of this negativity has been somewhat unclear. Here, we show how the full counting statistics can be tied to trajectories through Hilbert space, and how this directly connects negative quasiprobabilities to an unusual interference effect. Our findings are illustrated with the example of energy fluctuations in a driven bosonic resonator; we discuss how negative quasiprobability here could be detected experimentally using superconducting microwave circuits.</p>}},
author = {{Hofer, Patrick P. and Clerk, A. A.}},
issn = {{0031-9007}},
language = {{eng}},
month = {{01}},
number = {{1}},
publisher = {{American Physical Society}},
series = {{Physical Review Letters}},
title = {{Negative Full Counting Statistics Arise from Interference Effects}},
url = {{http://dx.doi.org/10.1103/PhysRevLett.116.013603}},
doi = {{10.1103/PhysRevLett.116.013603}},
volume = {{116}},
year = {{2016}},
}