Publications by Benjamin Yadin

Clock-Work Trade-Off Relation for Coherence in Quantum Thermodynamics.

Physical review letters 120 (2018) 150602-

H Kwon, H Jeong, D Jennings, B Yadin, MS Kim

In thermodynamics, quantum coherences-superpositions between energy eigenstates-behave in distinctly nonclassical ways. Here we describe how thermodynamic coherence splits into two kinds-"internal" coherence that admits an energetic value in terms of thermodynamic work, and "external" coherence that does not have energetic value, but instead corresponds to the functioning of the system as a quantum clock. For the latter form of coherence, we provide dynamical constraints that relate to quantum metrology and macroscopicity, while for the former, we show that quantum states exist that have finite internal coherence yet with zero deterministic work value. Finally, under minimal thermodynamic assumptions, we establish a clock-work trade-off relation between these two types of coherences. This can be viewed as a form of time-energy conjugate relation within quantum thermodynamics that bounds the total maximum of clock and work resources for a given system.

General measure for macroscopic quantum states beyond 'dead and alive'


P Sekatski, B Yadin, M-O Renou, W Duer, N Gisin, F Frowis

Insufficiency of avoided crossings for witnessing large-scale quantum coherence in flux qubits

Physical Review A 97 (2018)

F Fröwis, B Yadin, N Gisin

© 2018 American Physical Society. Do experiments based on superconducting loops segmented with Josephson junctions (e.g., flux qubits) show macroscopic quantum behavior in the sense of Schrödinger's cat example? Various arguments based on microscopic and phenomenological models were recently adduced in this debate. We approach this problem by adapting (to flux qubits) the framework of large-scale quantum coherence, which was already successfully applied to spin ensembles and photonic systems. We show that contemporary experiments might show quantum coherence more than 100 times larger than experiments in the classical regime. However, we argue that the often-used demonstration of an avoided crossing in the energy spectrum is not sufficient to make a conclusion about the presence of large-scale quantum coherence. Alternative, rigorous witnesses are proposed.

Insufficiency of avoided crossings for witnessing large-scale quantum coherence in flux qubits

PHYSICAL REVIEW A 97 (2018) ARTN 042103

F Frowis, B Yadin, N Gisin

Witnessing Multipartite Entanglement by Detecting Asymmetry

ENTROPY 19 (2017) ARTN 124

D Girolami, B Yadin

Detecting metrologically useful asymmetry and entanglement by a few local measurements

PHYSICAL REVIEW A 96 (2017) ARTN 042327

C Zhang, B Yadin, Z-B Hou, H Cao, B-H Liu, Y-F Huang, R Maity, V Vedral, C-F Li, G-C Guo, D Girolami

General framework for quantum macroscopicity in terms of coherence

PHYSICAL REVIEW A 93 (2016) ARTN 022122

B Yadin, V Vedral

Quantum Processes Which Do Not Use Coherence

PHYSICAL REVIEW X 6 (2016) ARTN 041028

B Yadin, J Ma, D Girolami, M Gu, V Vedral

Converting Coherence to Quantum Correlations.

Physical review letters 116 (2016) 160407-

J Ma, B Yadin, D Girolami, V Vedral, M Gu

Recent results in quantum information theory characterize quantum coherence in the context of resource theories. Here, we study the relation between quantum coherence and quantum discord, a kind of quantum correlation which appears even in nonentangled states. We prove that the creation of quantum discord with multipartite incoherent operations is bounded by the amount of quantum coherence consumed in its subsystems during the process. We show how the interplay between quantum coherence consumption and creation of quantum discord works in the preparation of multipartite quantum correlated states and in the model of deterministic quantum computation with one qubit.

Quantum macroscopicity versus distillation of macroscopic superpositions

PHYSICAL REVIEW A 92 (2015) ARTN 022356

B Yadin, V Vedral

ExoMol line lists - I. The rovibrational spectrum of BeH, MgH and CaH in the X-2 Sigma(+) state


B Yadin, T Veness, P Conti, C Hill, SN Yurchenko, J Tennyson

Evolution of the surface morphology of rubrene under ambient conditions


RJ Thompson, B Yadin, ZJ Grout, S Hudziak, CL Kloc, O Mitrofanov, NJ Curson

Morphology of cleaved rubrene and its evolution in an ambient environment


RJ Thompson, B Yadin, ZJ Grout, S Hudziak, CL Kloc, NJ Curson, O Mitrofanov

Witnessing quantum resource conversion within deterministic quantum computation using one pure superconducting qubit

ArXiv (0)

W Wang, B Yadin, Y Ma, J Ma, Y Xu, L Hu, H Wang, YP Song, M Gu, L Sun

Deterministic quantum computation with one qubit (DQC1) is iconic in highlighting that exponential quantum speedup may be achieved with negligible entanglement. Its discovery catalyzed heated study of general quantum resources, and various conjectures regarding their role in DQC1's performance advantage. Coherence and discord are prominent candidates, respectively characterizing non-classicality within localized and correlated systems. Here we realize DQC1 within a superconducting system, engineered such that the dynamics of coherence and discord can be tracked throughout its execution. We experimentally confirm that DQC1 acts as a resource converter, consuming coherence to generate discord during its operation. Our results highlight superconducting circuits as a promising platform for both realizing DQC1 and related algorithms, and experimentally characterizing resource dynamics within quantum protocols.