Thursday, January 11, 2018

Quantum Thermodynamics at APS March Meeting (2018)

American Physics Society organises another March Meeting for a week this year again. The venue will be at Los Angeles. There is aninvited session on quantum thermodynamics and information that contains 5 interesting talk by experimental and theoretical physicists. Highly recommended!

On Thursday morning 8-11AM, the following 5 invited speakers will give their talks:

Session R42: Progress in Quantum Thermodynamics
Sponsoring Units: DQI GSNP
Chair: Mohammad Ansari, Forschungszentrum Julich
Room: LACC 502B

8:00AM - 8:36AM
R42.00001: Progress in Thermodynamics of Superconducting and Hybrid Circuits
Invited Speaker: Jukka Pekola , Jonne Koski , Bayan Karimi , Alberto Ronzani , Jorden Senior , Olli Saira

8:36AM - 9:12AM
R42.00002: Fluctuation Theorem for Many-Body Pure Quantum States
Invited Speaker: Takahiro Sagawa

9:12AM - 9:48AM
R42.00003: Strong coupling quantum thermodynamics and beyond
Invited Speaker: Q. Jens Eisert

9:48AM - 10:24AM
R42.00004: Thermoelectrics of interacting nanosystems - Exploiting fermion-parity superselection instead of time-reversal symmetry

Invited Speaker: Janine Splettstoesser , Jens Schulenborg , Joren Vanherck , Angelo Di Marco , Maarten Wegewijs

10:24AM - 11:00AM
R42.00005: Quantum and Information Thermodynamics: A Unifying Framework Based on Repeated Interactions
Invited Speaker: Massimiliano Esposito

* By the way my own talk will be on the same day, an hour after this session is over, in another room.  I'll give a talk about a new formalism to deal with Transmon-like qubits. More info can be found below:

Session S39: Superconducting Circuits: Modeling
11:15 AM–2:15 PM, Thursday, March 8, 2018
LACC Room: 501B
Sponsoring Unit: DQI
Chair: Antonio Corcoles, IBM T J Watson Res Ctr
12:15 PM–12:27 PM

Abstract: S39.00006 : Effective Hamiltonian in superconducting qubits
Mohammad Ansari 
(Forschungszentrum Juelich)

Qubits with more than two energy levels, such as superconducting transmons, usually are externally driven in order to engineer one and two qubit gates. However due to the presence of higher excited levels the fidelity of the gates requires improvement. Such a system carries a large Hilbert space and recognizing effective qubits requires to use perturbation theory. This puts a lage limitation on the system parameters and interactions. We discuss a method that allows to go beyond regular perturbative limitations and separates classical effects from quantum fluctuations in the Hamiltonian of a weakly-anharmonic qubits. We compare results taken from applying Schrieffer-Wolff transformation, Least action principle, and our method. Our results will become practical tools for experimental efforts in circuit QED.

I may prepare a nice poster too to post on the wall, so please feel free to find my poster about a different topic:


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