TY - JOUR
T1 - Detecting the Universal Fractional Entropy of Majorana Zero Modes
AU - Sela, Eran
AU - Oreg, Yuval
AU - Plugge, Stephan
AU - Hartman, Nikolaus
AU - Lüscher, Silvia
AU - Folk, Joshua
N1 - Publisher Copyright:
© 2019 American Physical Society.
PY - 2019
Y1 - 2019
N2 - A pair of Majorana zero modes (MZMs) constitutes a nonlocal qubit whose entropy is log2. Upon strongly coupling one of the constituent MZMs to a reservoir with a continuous density of states, a universal entropy change of 12log2 is expected to be observed across an intermediate temperature plateau. We adapt the entropy-measurement scheme that was the basis of a recent experiment by Hartman et al. [Nat. Phys. 14, 1083 (2018)10.1038/s41567-018-0250-5] to the case of a proximitized topological system hosting MZMs and propose a method to measure this 12log2 entropy change - an unambiguous signature of the nonlocal nature of the topological state. This approach offers an experimental strategy to distinguish MZMs from non topological states.
AB - A pair of Majorana zero modes (MZMs) constitutes a nonlocal qubit whose entropy is log2. Upon strongly coupling one of the constituent MZMs to a reservoir with a continuous density of states, a universal entropy change of 12log2 is expected to be observed across an intermediate temperature plateau. We adapt the entropy-measurement scheme that was the basis of a recent experiment by Hartman et al. [Nat. Phys. 14, 1083 (2018)10.1038/s41567-018-0250-5] to the case of a proximitized topological system hosting MZMs and propose a method to measure this 12log2 entropy change - an unambiguous signature of the nonlocal nature of the topological state. This approach offers an experimental strategy to distinguish MZMs from non topological states.
UR - http://www.scopus.com/inward/record.url?scp=85073073476&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.123.147702
DO - 10.1103/PhysRevLett.123.147702
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:85073073476
SN - 0031-9007
VL - 123
JO - Physical Review Letters
JF - Physical Review Letters
IS - 14
M1 - 147702
ER -