Refrigeration via purification through repeated measurements
- URL: http://arxiv.org/abs/2206.00633v2
- Date: Thu, 15 Sep 2022 11:28:15 GMT
- Title: Refrigeration via purification through repeated measurements
- Authors: Tanoy Kanti Konar, Srijon Ghosh, Aditi Sen De
- Abstract summary: We design a measurement-based quantum refrigerator with an arbitrary number of qubits situated in a one-dimensional array.
The method proposed is based on repeated evolution followed by a measurement on the single accessible qubit.
We show that the number of subsystems which can be cooled changes depending on the odd or even number of sites in the refrigerator.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We design a measurement-based quantum refrigerator with an arbitrary number
of qubits situated in a one-dimensional array that interact through
variable-range XY interactions. The method proposed is based on repeated
evolution followed by a measurement on the single accessible qubit, which has
the potential to reduce the temperature in the rest of the subsystems, thereby
demonstrating cooling in the device. The performance of the refrigerator is
quantified by the fidelity of each local subsystem with the ground state of the
local Hamiltonian and the corresponding probability of success. We identify
system parameters, which include the interaction strength, range of
interactions, initial temperature of each qubit, and the position of the
measured qubit, so that the fidelities of all the unmeasured qubits approach
unity with a nonvanishing probability. We observe that although strong
interactions during evolution are required to achieve cooling, the long-range
interactions typically deteriorate the performance of the refrigerator, which
indicates that interactions are not ubiquitous. We report the scalability and
the saturation property of the success probability with respect to the system
size, which turns out to be independent of the involved system parameters and
the number of repeated measurements. Furthermore, we show that the number of
subsystems which can be cooled changes depending on the odd or even number of
sites in the refrigerator. We argue that the distribution of entanglement
between unmeasured qubits can give a possible explanation of the dependence of
cooling process on the measured and unmeasured sites.
Related papers
- Measurement-based qudit quantum refrigerator with subspace cooling [0.0]
We develop a method to transform a collection of higher-dimensional spin systems from the thermal state to a low-lying energy eigenstate.
The performance of the protocol is assessed by determining the fidelity of the target state with the output one.
arXiv Detail & Related papers (2024-09-12T19:56:27Z) - Nonlocal thermoelectric detection of interaction and correlations in
edge states [62.997667081978825]
We propose the nonlocal thermoelectric response as a direct indicator of the presence of interactions, nonthermal states and the effect of correlations.
A setup with two controllable quantum point contacts allows thermoelectricity to monitor the interacting system thermalisation.
arXiv Detail & Related papers (2023-07-18T16:28:59Z) - Evolution of many-body systems under ancilla quantum measurements [58.720142291102135]
We study the concept of implementing quantum measurements by coupling a many-body lattice system to an ancillary degree of freedom.
We find evidence of a disentangling-entangling measurement-induced transition as was previously observed in more abstract models.
arXiv Detail & Related papers (2023-03-13T13:06:40Z) - Full counting statistics as probe of measurement-induced transitions in
the quantum Ising chain [62.997667081978825]
We show that local projective measurements induce a modification of the out-of-equilibrium probability distribution function of the local magnetization.
In particular we describe how the probability distribution of the former shows different behaviour in the area-law and volume-law regimes.
arXiv Detail & Related papers (2022-12-19T12:34:37Z) - Observation of partial and infinite-temperature thermalization induced
by repeated measurements on a quantum hardware [62.997667081978825]
We observe partial and infinite-temperature thermalization on a quantum superconducting processor.
We show that the convergence does not tend to a completely mixed (infinite-temperature) state, but to a block-diagonal state in the observable basis.
arXiv Detail & Related papers (2022-11-14T15:18:11Z) - Heat transport and cooling performance in a nanomechanical system with
local and non local interactions [68.8204255655161]
We study heat transport through a one dimensional time-dependent nanomechanical system.
The system presents different stationary transport regimes depending on the driving frequency, temperature gradients and the degree of locality of the interactions.
arXiv Detail & Related papers (2022-02-21T12:03:54Z) - Continuous Measurement Boosted Adiabatic Quantum Thermal Machines [0.0]
We study continuous measurement based quantum thermal machines in static and adiabatically driven systems.
In the adiabatically driven case, we show how measurement based thermodynamic quantities can be attributed geometric characteristics.
arXiv Detail & Related papers (2021-12-07T20:18:16Z) - Taking the temperature of a pure quantum state [55.41644538483948]
Temperature is a deceptively simple concept that still raises deep questions at the forefront of quantum physics research.
We propose a scheme to measure the temperature of such pure states through quantum interference.
arXiv Detail & Related papers (2021-03-30T18:18:37Z) - Distribution of entanglement with variable range interactions [0.0]
We report the possibility of emphitative growth in the equilibrium entanglement between distant sites with an increase in the range interactions.
We reveal that the temperature at which the canonical state becomes entangled from an unentangled one increases with the increase in the range interactions.
arXiv Detail & Related papers (2020-06-16T15:34:31Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.