74 citations · 124 across the 14 of their papers we have counts for
16 papers
The quantum Mpemba effect in symmetric random Clifford circuits
Shion Yamashika, Filiberto Ares, Pasquale Calabrese
The quantum Mpemba effect is the counterintuitive phenomenon whereby a quantum state initially farther from equilibrium relaxes faster than one initially closer to it. We demonstra…
The Role of Completeness in Probing Symmetry Breaking
Yuya Kusuki, Hiroyasu Tajima, Shion Yamashika
Completeness is widely recognized in quantum information as an important property of a family of monotones, because it ensures that no information relevant to state conversion is l…
Permutationally Invariant Quantum State Tomography for Fermions
Shion Yamashika, Daisuke Yamamoto
Quantum state tomography provides complete information about a quantum state, but its measurement cost generally grows exponentially with system size. In many-particle quantum simu…
Quantum Many-Body Mpemba Effect through Ruelle-Pollicott Resonances
Shion Yamashika, Ryusuke Hamazaki
Relaxation towards equilibrium is often assumed to be slower when a system starts farther from equilibrium, but this intuition fails in the Mpemba effect. Recent advances in contro…
Dynamics of entanglement asymmetry for space-inversion symmetry of free fermions on honeycomb lattices
Ryogo Hara, Shimpei Endo, Shion Yamashika
We study the entanglement asymmetry for the space-inversion symmetry of free fermions on a two-dimensional honeycomb lattice with an on-site energy imbalance between the two sublat…
Phase Transitions and Noise Robustness of Quantum Graph States
Tatsuya Numajiri, Shion Yamashika, Tomonori Tanizawa +3
Graph states are entangled states that are essential for quantum information processing. As experimental advances enable the realization of large-scale graph states, efficient fide…
Quantum Fisher Information as a Measure of Symmetry Breaking in Quantum Many-Body Systems
Shion Yamashika, Shimpei Endo, Hiroyasu Tajima
Symmetry breaking underlies diverse phenomena from phase transitions in condensed matter to fundamental interactions in gauge theories. Despite many proposed indicators, a general…
Quantum Mpemba effect in long-range spin systems
Shion Yamashika, Filiberto Ares
One of the manifestations of the quantum Mpemba effect (QME) is that a tilted ferromagnet exhibits faster restoration of the spin-rotational symmetry after a quantum quench when st…
Quenching from superfluid to free bosons in two dimensions: entanglement, symmetries, and quantum Mpemba effect
Shion Yamashika, Pasquale Calabrese, Filiberto Ares
We study the non-equilibrium dynamics of bosons in a two-dimensional optical lattice after a sudden quench from the superfluid phase to the free-boson regime. The initial superflui…
Entanglement asymmetry and quantum Mpemba effect in two-dimensional free-fermion systems
Shion Yamashika, Filiberto Ares, Pasquale Calabrese
The quantum Mpemba effect is the counter-intuitive non-equilibrium phenomenon wherein the dynamic restoration of a broken symmetry occurs more rapidly when the initial state exhibi…
Time evolution of entanglement entropy after quenches in two-dimensional free fermion systems: a dimensional reduction treatment
Shion Yamashika, Filiberto Ares, Pasquale Calabrese
We study the time evolution of the Rényi entanglement entropies following a quantum quench in a two-dimensional (2D) free-fermion system. By employing dimensional reduction, we eff…
Simplest fidelity-estimation method for graph states with depolarizing noise
Tomonori Tanizawa, Yuki Takeuchi, Shion Yamashika +2
Graph states are entangled states useful for several quantum information processing tasks such as measurement-based quantum computation and quantum metrology. As the size of graph…
Evolution of entanglement entropy in strongly correlated bosons in an optical lattice
Shion Yamashika, Daichi Kagamihara, Ryosuke Yoshii +1
We investigate the time evolution of the second-order Rényi entropy (RE) for bosons in a one-dimensional optical lattice following a sudden quench of the hopping amplitude . Spe…
Rényi entanglement entropy after a quantum quench starting from insulating states in a free boson system
Daichi Kagamihara, Ryui Kaneko, Shion Yamashika +4
We investigate the time-dependent Rényi entanglement entropy after a quantum quench starting from the Mott-insulating and charge-density-wave states in a one-dimensional free boson…
Stability of supercurrents in a superfluid phase of spin-1 bosons in an optical lattice
Shion Yamashika, Ryosuke Yoshii, Shunji Tsuchiya
We study collective modes and superfluidity of spin-1 bosons with antiferromagnetic interactions in an optical lattice based on the time-dependent Ginzburg-Landau (TDGL) equation d…
Entanglement propagation in thermalization of an isolated quantum system
Ryosuke Yoshii, Shion Yamashika, Shunji Tsuchiya
We study dynamics of entanglement in the thermalization process of an isolated quantum many-body system. We propose a simple setup for measuring the propagation speed of entangleme…