1. International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China 2. Collaborative Innovation Center of Quantum Matter, Beijing 100871, China 3. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China 4. Institute of Modern Physics, Northwest University, Xi'an 710127, China 5. Department of Theoretical Physics, Research School of Physics and Engineering, Australian National University, Canberra ACT 0200, Australia 6. Beijing Academy of Quantum Information Sciences, Beijing 100193, China
Weakly interacting quantum systems in low dimensions have been investigated for a long time, but there still remain a number of open questions and a lack of explicit expressions of physical properties of such systems. In this work, we find power-law scalings of thermodynamic observables in low-dimensional interacting Bose gases at quantum criticality. We present a physical picture for these systems with the repulsive interaction strength approaching zero; namely, the competition between the kinetic and interaction energy scales gives rise to power-law scalings with respect to the interaction strength in characteristic thermodynamic observables. This prediction is supported by exact Bethe ansatz solutions in one dimension, demonstrating a simple 1/3-power-law scaling of the critical entropy per particle. Our method also yields results in agreement with a non-perturbative renormalization-group computation in two dimensions. These results provide a new perspective for understanding many-body phenomena induced by weak interactions in quantum gases.
D. Lee T. , Huang K. , N. Yang C. . Eigenvalues and eigenfunctions of a Bose system of hard spheres and its low-temperature properties. Phys. Rev., 1957, 106( 6): 1135 https://doi.org/10.1103/PhysRev.106.1135
2
N. Yang C. , P. Yang C. . Thermodynamics of a one-dimensional system of bosons with repulsive delta-function interaction. J. Math. Phys., 1969, 10( 7): 1115 https://doi.org/10.1063/1.1664947
3
Dalfovo F. , Giorgini S. , P. Pitaevskii L. , Stringari S. . Theory of Bose−Einstein condensation in trapped gases. Rev. Mod. Phys., 1999, 71( 3): 463 https://doi.org/10.1103/RevModPhys.71.463
4
Prokof’ev N. , Ruebenacker O. , Svistunov B. . Critical point of a weakly interacting two-dimensional Bose gas. Phys. Rev. Lett., 2001, 87( 27): 270402 https://doi.org/10.1103/PhysRevLett.87.270402
5
Prokof’ev N. , Svistunov B. . Two-dimensional weakly interacting Bose gas in the fluctuation region. Phys. Rev. A, 2002, 66( 4): 043608 https://doi.org/10.1103/PhysRevA.66.043608
6
Floerchinger S. , Wetterich C. . Nonperturbative thermodynamics of an interacting Bose gas. Phys. Rev. A, 2009, 79( 6): 063602 https://doi.org/10.1103/PhysRevA.79.063602
7
Z. Jiang Y. , Y. Chen Y. , W. Guan X. . Understanding many-body physics in one dimension from the Lieb–Liniger model. Chin. Phys. B, 2015, 24( 5): 050311 https://doi.org/10.1088/1674-1056/24/5/050311
Bettelheim E. . The Whitham approach to the c → 0 limit of the Lieb–Liniger model and generalized hydrodynamics. J. Phys. A Math. Theor., 2020, 53( 20): 205204 https://doi.org/10.1088/1751-8121/ab8676
W. Guan X. , T. Batchelor M. , Lee C. . Fermi gases in one dimension: From Bethe ansatz to experiments. Rev. Mod. Phys., 2013, 85( 4): 1633 https://doi.org/10.1103/RevModPhys.85.1633
N. Yang C. . Some exact results for the many-body problem in one dimension with repulsive δ-function interaction. Phys. Rev. Lett., 1967, 19( 23): 1312 https://doi.org/10.1103/PhysRevLett.19.1312
14
Takahashi M. . Ground state energy of the one-dimensional electron system with short-range interaction (I). Prog. Theor. Phys., 1970, 44 : 348 https://doi.org/10.1143/PTP.44.348
15
Iida T. , Wadati M. . Exact analysis of a one-dimensional attractive δ-function Fermi gas with arbitrary spin polarization. J. Low Temp. Phys., 2007, 148( 3−4): 417 https://doi.org/10.1007/s10909-007-9409-7
16
W. Guan X. . Polaron, molecule and pairing in one-dimensional spin-1/2 Fermi gas with an attractive delta-function interaction. Front. Phys., 2012, 7( 1): 8 https://doi.org/10.1007/s11467-011-0213-0
17
W. Guan X. , Q. Ma Z. . One-dimensional multicomponent fermions with δ-function interaction in strong- and weak-coupling limits: Two-component Fermi gas. Phys. Rev. A, 2012, 85( 3): 033632 https://doi.org/10.1103/PhysRevA.85.033632
18
W. Guan X. , Q. Ma Z. , Wilson B. . One-dimensional multicomponent fermions with δ -function interaction in strong- and weak-coupling limits: κ-component Fermi gas. Phys. Rev. A, 2012, 85( 3): 033633 https://doi.org/10.1103/PhysRevA.85.033633
A. Tracy C. , Widom H. . On the ground state energy of the δ-function Fermi gas. J. Math. Phys., 2016, 57( 10): 103301 https://doi.org/10.1063/1.4964252
21
Prolhac S. . Ground state energy of the δ-Bose and Fermi gas at weak coupling from double extrapolation. J. Phys. A Math. Theor., 2017, 50( 14): 144001 https://doi.org/10.1088/1751-8121/aa5e00
G. Batrouni G. , T. Scalettar R. , T. Zimanyi G. . Quantum critical phenomena in one-dimensional Bose systems. Phys. Rev. Lett., 1990, 65( 14): 1765 https://doi.org/10.1103/PhysRevLett.65.1765
A. Cazalilla M. , Citro R. , Giamarchi T. , Orignac E. , Rigol M. . One dimensional bosons: From condensed matter systems to ultracold gases. Rev. Mod. Phys., 2011, 83( 4): 1405 https://doi.org/10.1103/RevModPhys.83.1405
26
Chin C. Universal Themes of Bose−Einstein Condensation in: by D. Snoke edited Proukakis N. Littlewood P., Cambridge University Press, 2017, Chapter 9, pp 175– 195
L. Ho T. , Zhou Q. . Obtaining the phase diagram and thermodynamic quantities of bulk systems from the densities of trapped gases. Nat. Phys., 2010, 6( 2): 131 https://doi.org/10.1038/nphys1477
29
Pilati S. , Giorgini S. , Prokof’ev N. . Critical temperature of interacting Bose gases in two and three dimensions. Phys. Rev. Lett., 2008, 100( 14): 140405 https://doi.org/10.1103/PhysRevLett.100.140405
Kinast J. , Turlapov A. , E. Thomas J. , Chen Q. , Stajic J. , Levin K. . Heat capacity of a strongly interacting Fermi gas. Science, 2005, 307( 5713): 1296 https://doi.org/10.1126/science.1109220
32
Luo L. , E. Thomas J. . Thermodynamic measurements in a strongly interacting Fermi gas. J. Low Temp. Phys., 2009, 154( 1−2): 1 https://doi.org/10.1007/s10909-008-9850-2
33
Nascimbène S. , Navon N. , J. Jiang K. , Chevy F. , Salomon C. . Exploring the thermodynamics of a universal Fermi gas. Nature, 2010, 463( 7284): 1057 https://doi.org/10.1038/nature08814
34
Navon N. , Nascimbene S. , Chevy F. , Salomon C. . The equation of state of a low-temperature Fermi gas with tunable interactions. Science, 2010, 328( 5979): 729 https://doi.org/10.1126/science.1187582
35
L. Hung C. , Zhang X. , Gemelke N. , Chin C. . Observation of scale invariance and universality in two-dimensional Bose gases. Nature, 2011, 470( 7333): 236 https://doi.org/10.1038/nature09722
36
Yefsah T. , Desbuquois R. , Chomaz L. , J. Gunter K. , Dalibard J. . Exploring the thermodynamics of a two-dimensional Bose gas. Phys. Rev. Lett., 2011, 107( 13): 130401 https://doi.org/10.1103/PhysRevLett.107.130401
37
J. H. Ku M. , T. Sommer A. , W. Cheuk L. , W. Zwierlein M. . Revealing the superfluid lambda transition in the universal thermodynamics of a unitary Fermi gas. Science, 2012, 335( 6068): 563 https://doi.org/10.1126/science.1214987
38
Zhang X. , L. Hung C. , K. Tung S. , Chin C. . Observation of quantum criticality with ultracold atoms in optical lattices. Science, 2012, 335( 6072): 1070 https://doi.org/10.1126/science.1217990
39
C. Ha L. , L. Hung C. , Zhang X. , Eismann U. , K. Tung S. , Chin C. . Strongly interacting two-dimensional Bose gases. Phys. Rev. Lett., 2013, 110( 14): 145302 https://doi.org/10.1103/PhysRevLett.110.145302
40
Vogler A. Labouvie R. Stubenrauch F. Barontini G. Guarrera V. Ott H., Thermodynamics of strongly correlated one-dimensional Bose gases, Phys. Rev. A 88, 031603(R) ( 2013)
41
Yang B. , Y. Chen Y. , G. Zheng Y. , Sun H. , N. Dai H. , W. Guan X. , S. Yuan Z. , W. Pan J. . Quantum criticality and the Tomonaga−Luttinger liquid in one-dimensional Bose gases. Phys. Rev. Lett., 2017, 119( 16): 165701 https://doi.org/10.1103/PhysRevLett.119.165701
42
Zhang X. , Y. Chen Y. , X. Liu L. , J. Deng Y. , W. Guan X. . Interaction-induced particle−hole symmetry breaking and fractional exclusion statistics. Natl. Sci. Rev.,, 2022, nwac027 https://doi.org/10.1093/nsr/nwac027
43
P. A. Fisher M. , B. Weichman P. , Grinstein G. , S. Fisher D. . Boson localization and the superfluid−insulator transition. Phys. Rev. B, 1989, 40( 1): 546 https://doi.org/10.1103/PhysRevB.40.546
44
A. Khare, Fractional Statistics and Quantum Theory, World Scientific Publishing Co. Pte. Ltd., 5 Toh Tuck Link, Singapore 596224, 2005, Chapter 5, 2nd Ed
45
Grüter P. , Ceperley D. , Laloe F. . Critical temperature of Bose−Einstein condensation of hard-sphere gases. Phys. Rev. Lett., 1997, 79( 19): 3549 https://doi.org/10.1103/PhysRevLett.79.3549
46
H. Lieb E. , Liniger W. . Exact analysis of an interacting Bose gas (I): The general solution and the ground state. Phys. Rev., 1963, 130( 4): 1605 https://doi.org/10.1103/PhysRev.130.1605
47
W. Guan X. , T. Batchelor M. . Polylogs, thermodynamics and scaling functions of one-dimensional quantum many-body systems. J. Phys. A Math. Theor., 2011, 44( 10): 102001 https://doi.org/10.1088/1751-8113/44/10/102001
48
Tonks L. . The complete equation of state of one, two and three-dimensional gases of hard elastic spheres. Phys. Rev., 1936, 50( 10): 955 https://doi.org/10.1103/PhysRev.50.955
49
Girardeau M. . Relationship between systems of impenetrable bosons and fermions in one dimension. J. Math. Phys., 1960, 1( 6): 516 https://doi.org/10.1063/1.1703687
50
Paredes B. , Widera A. , Murg V. , Mandel O. , Folling S. , Cirac I. , V. Shlyapnikov G. , W. Hansch T. , Bloch I. . Tonks–Girardeau gas of ultracold atoms in an optical lattice. Nature, 2004, 429( 6989): 277 https://doi.org/10.1038/nature02530
51
Kinoshita T. , Wenger T. , S. Weiss D. . Observation of a one-dimensional Tonks−Girardeau gas. Science, 2004, 305( 5687): 1125 https://doi.org/10.1126/science.1100700
52
Supporting information is available as supplementary materials.
Wolf B. , Tsui Y. , Jaiswal-Nagar D. , Tutsch U. , Honecker A. , Remović-Langer K. , Hofmann G. , Prokofiev A. , Assmus W. , Donath G. , Lang M. . Magnetocaloric effect and magnetic cooling near a field-induced quantum-critical point. Proc. Natl. Acad. Sci. USA, 2011, 108( 17): 6862 https://doi.org/10.1073/pnas.1017047108
57
Y. Chen Y. , Watanabe G. , C. Yu Y. , W. Guan X. , del Campo A. . An interaction-driven many-particle quantum heat engine and its universal behavior. npj Quantum Inf., 2019, 5 : 88 https://doi.org/10.1038/s41534-019-0204-5