Publications
Links to google scholar and arXiv
Preprints
1. C. Weis, M. Fruchart, R. Hanai, K. Kawagoe, P. B. Littlewood, and V. Vitelli
“Coalescence of attractors: exceptional points in non-linear dynamical systems”
Journal Articles
25. S. Begg and R. Hanai
“Universality in Open Quantum Spin Chains with Non-Reciprocity”
Physical Review Letters 132, 120401 (2024); arXiv:2307.03714.
24. R. Hanai
“Non-reciprocal frustration: time crystalline order-by-disorder phenomenon and a spin-glass-like state”
Physical Review X 14, 011029 (2024); arXiv:2208.08577.
[Highlighted in Physics]
23. Y. Hirono and R. Hanai
“Squeezing stationary distributions of stochastic chemical reaction systems”
Journal of Statistical Physics 190, 86 (2023); arXiv:2209.08787.
22. T. Kawamura, R. Hanai, and Y. Ohashi
Fermi-surface-engineered unconventional superfluid states in a driven-dissipative non-equilibrium Fermi gas
Physical Review A 106, 013311 (2022). arXiv:2111.02594
21. A. McDonald, R. Hanai, and A. Clerk
Nonequilibrium stationary states of quantum non-Hermitian lattice models
Physical Review B 105, 064302 (2022). arXiv:2103.01941
[Selected as Editor’s Suggestion]
20. R. Hanai, A. McDonald, and A. Clerk
Intrinsic mechanisms for drive-dependent Purcell decay in superconducting quantum circuits
Physical Review Research 3, 043228 (2021). arXiv:2106.05179
19. M. Steger, R. Hanai, A. Edelman, P. B. Littlewood, D. W. Snoke, J. Beaumariage, K. West, L. Pfeiffer, A. Mascarenhas
“Direct observation of quantum-fluctuation driven amplitude mode in a microcavity polariton condensate”
Physical Review B 103, 205125 (2021). arXiv:1912.06687
[Selected as Editor’s Suggestion]
18. M. Fruchart*, R. Hanai*, P. B. Littlewood, and V. Vitelli (*equal contribution)
Non-reciprocal phase transitions
Nature 592, 363–369 (2021). arXiv:2003.13176
[Highlighted in "News and Views" in Nature and Quanta Magazine]
17. R. Hanai and P. B. Littlewood
Critical fluctuations at a many-body exceptional point
Physical Review Research 2, 033018 (2020). arXiv:1908.03243
16. T. Kawamura, R. Hanai, D. Kagamihara, D. Inotani, and Y. Ohashi
Nonequilibrium strong-coupling theory for a driven-dissipative ultracold Fermi gas in the BCS-BEC crossover region
Physical Review A 101, 013602 (2020). arXiv:1910.12476
15. R. Hanai, A. Edelman, Y. Ohashi, and P. B. Littlewood
Non-Hermitian phase transition from a polariton Bose-Einstein condensate to a photon laser
Physical Review Letters 122, 185301 (2019). arXiv:1809.01273
[Highlighted in Quanta Magazine]
14. R. Hanai, P. B. Littlewood, and Y. Ohashi
Photoluminescence and gain/absorption spectra of a driven-dissipative electron-hole-photon condensate
Physical Review B 97, 245302 (2018). arXiv:1802.00794
[Selected as the Editor’s Suggestion]
13. M. Matsumoto, R. Hanai, D. Inotani, and Y. Ohashi
Pseudogap Regime of a Two-dimensional Uniform Fermi Gas
Journal of Physical Society of Japan 87, 014301 (2018). arXiv:1710.01479
12. R. Hanai, P. B. Littlewood, and Y. Ohashi
Dynamical instability of a driven-dissipative electron-hole condensate in the BCS-BEC crossover region
Physical Review B 96, 125206 (2017). arXiv:1610.08622
11. H. Tajima, P. van Wyk, R. Hanai, D. Kagamihara, D. Inotani, M. Horikoshi, and Y. Ohashi
Strong-coupling corrections to ground-state properties of a superfluid Fermi gas
Physical Review A 95, 043625 (2017). arXiv:1704.01032
10. M. Ota, H. Tajima, R. Hanai, D. Inotani, and Y. Ohashi
Local Photoemission spectra and effects of spatial inhomogeneity in the BCS-BEC crossover regime of a trapped ultracold Fermi gas
Physical Review A 95, 053623 (2017). arXiv:1703.01197
9. H. Tajima, R. Hanai, and Y. Ohashi
Spin susceptibility and effects of a harmonic trap in the BCS-BEC crossover regime of an ultracold Fermi gas
Physical Review A 96 033614 (2017). arXiv:1706.05679
8. D. Kharga, D. Inotani, R. Hanai, and Y. Ohashi
Single-Particle Excitations and Effects of Hetero-Pairing Fluctuations in a Bose–Fermi Mixture with a Feshbach Resonance
Journal of Physical Society of Japan 86, 084301 (2017).
7. D. Inotani, R. Hanai, and Y. Ohashi
Triplet pair amplitude in a trapped s-wave superfluid Fermi gas with broken spin rotation symmetry. II. Three dimensional continuum case
Physical Review A 94, 043632 (2016). arXiv:1610.01026
6. P. van Wyk, H. Tajima, R. Hanai, and Y. Ohashi
Specific heat and effects of pairing fluctuations in the BCS-BEC crossover regime of an ultracold Fermi gas
Physical Review A 93, 013621 (2016). arXiv:1509.07232
5. H. Tajima, R. Hanai, Y. Ohashi
Strong-coupling corrections to spin susceptibility in the BCS-BEC crossover regime of a superfluid Fermi gas
Physical Review A 93, 013610 (2016). arXiv:1510.04401
4. R. Hanai and Y. Ohashi
Heteropairing and component-dependent pseudogap phenomena in an ultracold Fermi gas with different species with different masses
Physical Review A 90, 043622 (2014). arXiv:1407.7232
3. Y. Endo, D. Inotani, R. Hanai, and Y. Ohashi
Triplet pair amplitude in a trapped s-wave superfluid Fermi gas with broken spin rotation symmetry
Physical Review A 92, 023610 (2015). arXiv:1505.05640
2. H. Tajima, T. Kashimura, R. Hanai, R. Watanabe, and Y. Ohashi
Uniform spin susceptibility and spin-gap phenomenon in the BCS-BEC-crossover regime of an ultracold Fermi gas
Physical Review A 89, 033617 (2014). arXiv:1312.1035
1. R. Hanai, T. Kashimura, R. Watanabe, D. Inotani, and Y. Ohashi
Excitation properties and effects of mass imbalance in the BCS-BEC crossover regime of an ultracold Fermi gas
Physical Review A 88, 053621 (2013). arXiv:1309.5622
Conference Proceedings
15. T. Kawamura, D. Kagamihara, R. Hanai, and Y. Ohashi
Strong-coupling theory for a non-equilibrium unitary Fermi gas
J. Low Temp. Phys. (2019), doi:10.1007/s10909-019-02310-7 (published online).
14. M. Matsumoto, R. Hanai, D. Inotani, and Y. Ohashi
Pairing fluctuations in a strongly interacting two-dimensional Fermi gas
Journal of Physics: Conference Series 969, 012012 (2018).
13. M. Matsumoto, R. Hanai, D. Inotani, and Y. Ohashi
Pseudogap phenomena near the BKT transition of a two-dimensional ultracold Fermi gas in the crossover region
Journal of Low Temperature Physics 187, 668 (2017).
12. H. Tajima, P. van Wyk, R. Hanai, D. Kagamihara, D. Inotani, M. Horikoshi, and Y. Ohashi
Zero-Temperature Properties of a Strongly Interacting Superfluid Fermi Gas in the BCS-BEC Crossover Region
Journal of Low Temperature Physics 187, 677 (2017).
11. D. Kharga, D. Inotani, R. Hanai, and Y. Ohashi
Single-particle properties of a strongly interacting Bose-Fermi mixture above the BEC phase transition temperature
Journal of Low Temperature Physics 187, 661 (2017).
10. R. Hanai, P. B. Littlewood, and Y. Ohashi
Non-equilibrium properties of a pumped-decaying Bose-condensed electron-hole gas in the BCS-BEC crossover region
Journal of Low Temperature Physics 183, 127 (2016).
9. P. van Wyk, H. Tajima, R. Hanai, and Y. Ohashi
Strong coupling effects on the specific heat of an ultracold Fermi gas in the unitarity limit
Journal of Low Temperature Physics 183, 183 (2016).
8. H. Tajima, R. Hanai, and Y. Ohashi
Spin susceptibility and effects of inhomogeneous strong pairing fluctuations in a trapped ultracold Fermi gas”
Journal of Low Temperature Physics 183, 175 (2016).
7. R. Hanai and Y. Ohashi,
Self-consistent T-matrix approach to an interacting ultracold Fermi gas with mass imbalance
Journal of Low Temperature Physics 175, 272 (2014).
6. H. Tajima, R. Hanai, R. Watanabe, and Y. Ohashi
Spin susceptibility and strong coupling effects in an ultracold Fermi gas
Journal of Low Temperature Physics 175, 279 (2014).
5. R. Hanai and Y. Ohashi
Single-particle excitations and hetero-pairing effects in an ultracold Fermi gas with mass imbalance
JPS Conference Proceedings 1, 012094 (2014).
4. H. Tajima, T. Kashimura, R. Hanai, R. Watanabe, and Y. Ohashi
Spin-gap temperature in the BCS-BEC crossover regime of an ultracold Fermi gas
JPS Conference Proceedings 1, 012096 (2014).
3. H. Tajima, R. Hanai, and Y. Ohashi
Spin-gap phenomenon in a strongly interacting ultracold Fermi gas
Journal of Physics: Conference Series 568, 012019 (2014)
2. R. Hanai and Y. Ohashi
Hetero-pairing and pseudogap phenomena in an ultracold Fermi gas with mass imbalance
Journal of Physics: Conference Series 568, 012004 (2014).
1. R. Hanai, T. Kashimura, R. Watanabe, D. Inotani, and Y. Ohashi
Superfluid phase transition and strong-coupling effects in an ultracold Fermi gas with mass imbalance
Journal of Low Temperature Physics 171, 389 (2013).