Yevheniia Cheipesh
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View article: Classifying fermionic states via many-body correlation measures
Classifying fermionic states via many-body correlation measures Open
Understanding the structure of quantum correlations in a many-body system is key to its computational treatment. For fermionic systems, correlations can be defined as deviations from Slater determinant states. The link between fermionic co…
View article: Can we use heavy nuclei to detect relic neutrinos?
Can we use heavy nuclei to detect relic neutrinos? Open
View article: Classifying fermionic states via many-body correlation measures
Classifying fermionic states via many-body correlation measures Open
Understanding the structure of quantum correlations in a many-body system is key to its computational treatment. For fermionic systems, correlations can be defined as deviations from Slater determinant states. The link between fermionic co…
View article: Can we really detect relic neutrinos?
Can we really detect relic neutrinos? Open
Detecting relic neutrinos is a longstanding goal in fundamental physics. Experimentally, this goal is extremely challenging as the required energy resolution is defined by the tiny neutrino masses ( \sim 10 meV). The current consensus is …
View article: Energy dynamics, information and heat flow in quenched cooling and the crossover from quantum to classical thermodynamics
Energy dynamics, information and heat flow in quenched cooling and the crossover from quantum to classical thermodynamics Open
View article: Heisenberg’s uncertainty principle in the PTOLEMY project: A theory update
Heisenberg’s uncertainty principle in the PTOLEMY project: A theory update Open
We discuss the consequences of the quantum uncertainty on the spectrum of the electron emitted by the 𝛽-processes of a tritium atom bound to a graphene sheet. We analyze quantitatively the issue recently raised by Cheipesh, Cheianov, and B…
View article: Navigating the pitfalls of relic neutrino detection
Navigating the pitfalls of relic neutrino detection Open
Beta-spectrum of radioactive atoms was long ago predicted to bear an imprint of the Cosmic Neutrino Background (C$ν$B). Over the years, it has been recognised that the best chance of achieving the signal-to-noise ratio required for the obs…
View article: Can we use heavy nuclei to detect relic neutrinos?
Can we use heavy nuclei to detect relic neutrinos? Open
Recent analysis of the viability of solid state-based relic neutrino detectors has revealed the fundamental necessity for the use of heavy, $A>100$, $β$-decayers as neutrino targets. Of all heavy isotopes, $^{171}$Tm and $^{151}$Sm stand o…
View article: Information to energy conversion in quantum composite systems at finite temperature
Information to energy conversion in quantum composite systems at finite temperature Open
It is known that entanglement can be converted to work in quantum composite systems. In this paper we consider a quench protocol for two initially independent reservoirs $A$ and $B$ described by the quantum thermal states. For a free fermi…
View article: Quantum tunneling dynamics in a complex-valued Sachdev-Ye-Kitaev model quench-coupled to a cool bath
Quantum tunneling dynamics in a complex-valued Sachdev-Ye-Kitaev model quench-coupled to a cool bath Open
The Sachdev-Ye-Kitaev (SYK) model describes interacting fermionic zero modes\nin zero spatial dimensions, e.g. quantum dot, with interactions strong enough\nto completely washout quasiparticle excitations in the infrared. In this paper,\nw…
View article: Voltage staircase in a current-biased quantum-dot Josephson junction
Voltage staircase in a current-biased quantum-dot Josephson junction Open
We calculate the current-voltage (I-V) characteristic of a Josephson junction containing a resonant level in the weakly coupled regime (resonance width small compared to the superconducting gap). The phase phi across the junction becomes t…
View article: Heisenberg's uncertainty as a limiting factor for neutrino mass detection in $\beta$-decay
Heisenberg's uncertainty as a limiting factor for neutrino mass detection in $\beta$-decay Open
In order to explore the potential of beta-decay experiments to detect relic neutrinos (C$\nu$B), we study the intrinsic irreducible uncertainty in the energy of electrons resulting from the zero-point motion of the emitter. Motivated by th…
View article: Quantum tunneling dynamics in complex SYK model quenched-coupled to a cool-bath
Quantum tunneling dynamics in complex SYK model quenched-coupled to a cool-bath Open
The Sachdev-Ye-Kitaev (SYK) model describes interacting fermionic zero modes in zero spatial dimensions, e.g. quantum dot, with interactions strong enough to completely washout quasiparticle excitations in the infrared. In this note, we co…
View article: Entanglement correction due to local interactions in many-body systems
Entanglement correction due to local interactions in many-body systems Open
The correction to the area law for the bipartite min-entanglement entropy of weakly and locally interacting fermions is calculated based on a perturbative extension of the flow equation holography method. Explicit calculations for the one-…
View article: Reentrant superconductivity in a quantum dot coupled to a Sachdev-Ye-Kitaev metal
Reentrant superconductivity in a quantum dot coupled to a Sachdev-Ye-Kitaev metal Open
The Planckian relaxation rate $ℏ/t_P = 2πk_BT$ sets a characteristic timescale for both the equilibration of quantum critical systems and maximal quantum chaos. In this Rapid Communication, we show that at the critical coupling between a s…
View article: Planckian superconductor
Planckian superconductor Open
The Planckian relaxation rate $\hbar/t_\mathrm{P} = 2πk_\mathrm{B} T$ sets a characteristic time scale for both equilibration of quantum critical systems and maximal quantum chaos. In this note, we show that at the critical coupling betwee…
View article: Exact description of the boundary theory of the Kitaev toric code with open boundary conditions
Exact description of the boundary theory of the Kitaev toric code with open boundary conditions Open
In this work we consider the Kitaev Toric Code with specific open boundary conditions. Such a physical system has a highly degenerate ground state determined by the degrees of freedom localised at the boundaries. We can write down an expli…