TY - JOUR
T1 - Quantum bath refrigeration towards absolute zero
T2 - Challenging the unattainability principle
AU - Kolar, Michal
AU - Gelbwaser-Klimovsky, D.
AU - Alicki, Robert
AU - Kurizki, Gershon
AU - Kolář, M.
N1 - ISF; DIP; Humboldt-Meitner Award; Weston Visiting Professorship; CONACYT; Czech Science Foundation [GAP205/10/1657]The support of ISF, DIP, the Humboldt-Meitner Award (G. K.), the Weston Visiting Professorship (R. A.), CONACYT (D. G.) and the Czech Science Foundation, GAP205/10/1657 (M. K.) are acknowledged. Useful discussions are acknowledged with Nir Gov and Ronnie Kosloff. M. K. and D. G. contributed equally to this work.
PY - 2012/8/27
Y1 - 2012/8/27
N2 - A minimal model of a quantum refrigerator, i.e., a periodically phase-flipped two-level system permanently coupled to a finite-capacity bath (cold bath) and an infinite heat dump (hot bath), is introduced and used to investigate the cooling of the cold bath towards absolute zero (T=0). Remarkably, the temperature scaling of the cold-bath cooling rate reveals that it does not vanish as T→0 for certain realistic quantized baths, e.g., phonons in strongly disordered media (fractons) or quantized spin waves in ferromagnets (magnons). This result challenges Nernst's third-law formulation known as the unattainability principle.
AB - A minimal model of a quantum refrigerator, i.e., a periodically phase-flipped two-level system permanently coupled to a finite-capacity bath (cold bath) and an infinite heat dump (hot bath), is introduced and used to investigate the cooling of the cold bath towards absolute zero (T=0). Remarkably, the temperature scaling of the cold-bath cooling rate reveals that it does not vanish as T→0 for certain realistic quantized baths, e.g., phonons in strongly disordered media (fractons) or quantized spin waves in ferromagnets (magnons). This result challenges Nernst's third-law formulation known as the unattainability principle.
UR - http://www.scopus.com/inward/record.url?scp=84865607403&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.109.090601
DO - 10.1103/PhysRevLett.109.090601
M3 - مقالة
SN - 0031-9007
VL - 109
JO - Physical review letters
JF - Physical review letters
IS - 9
M1 - 090601
ER -